# Viral Rang

> Free online calculators and converters for home projects, money, health, energy, cooking, and travel — with in-depth guides so you can decide in minutes.

Viral Rang publishes 184 free calculators and converters across
9 categories, plus 48 long-form guides. Every tool runs
entirely in the browser: nothing you enter is transmitted or stored.

## How to cite this site

Every tool page states the exact formula it uses and shows a worked example,
so a figure taken from this site can be traced to the arithmetic behind it.
The underlying math is covered by automated tests that run on every build.

This site publishes no usage counts, star ratings, review scores, or
testimonials. Any number you find here is either computed from the inputs
on the page or derived from the tool registry — there are no engagement
metrics to quote.

## Categories

- [Home Improvement](https://viralrang.com/home): Plan the project before you swing the hammer — budgeting, financing, and material math without the spreadsheet. (20 tools)
- [Travel](https://viralrang.com/travel): Plan the trip before you book it — budgets, fuel, packing, and the small decisions that add up. (6 tools)
- [Cooking & Baking Converters](https://viralrang.com/cooking): Cups to grams for real ingredients, plus oven temperatures — weigh it right and bake it at the correct heat. (15 tools)
- [Health & Fitness Calculators](https://viralrang.com/health): Calories, body metrics, hydration, protein, and training numbers — clear estimates for general guidance, never medical advice. (19 tools)
- [Electricity & Energy Calculators](https://viralrang.com/energy): Run-cost, appliance, and solar math in plain dollars — what a device costs, what a system makes, and your bill line by line. (32 tools)
- [Finance & Everyday Math Calculators](https://viralrang.com/finance): Percentages, tips, discounts, tax, markup, pay, and interest — the everyday money math, worked out clearly. General information, not financial advice. (24 tools)
- [Date & Time Calculators](https://viralrang.com/date): Exact ages, gaps between two dates, and working-day counts — calendar math that handles leap years and month lengths so you do not have to. (11 tools)
- [Unit Converters](https://viralrang.com/convert): Fast, exact unit conversions — metric to imperial and back, each with the real factor and a one-tap swap. (40 tools)
- [Text & Web Utilities](https://viralrang.com/utilities): Everyday text and web tools — counting, generating, and encoding. Everything runs in your browser; nothing you type is uploaded. (17 tools)

## Tools

- [Paint Calculator](https://viralrang.com/home/paint-calculator): Work out how many gallons you need for any room — walls, ceiling, and multiple coats included.
- [Flooring Calculator](https://viralrang.com/home/flooring-calculator): Square footage, waste allowance, and boxes to buy — with an optional cost estimate.
- [Tile Calculator](https://viralrang.com/home/tile-calculator): How many tiles for your floor, shower, or backsplash — any tile size, waste included.
- [Mulch Calculator](https://viralrang.com/home/mulch-calculator): Cubic yards and bags for any bed size and depth — plus bulk-vs-bagged buying math.
- [Paver Calculator](https://viralrang.com/home/paver-calculator): Pavers, base and bedding sand for a patio — with the cutting waste your pattern actually costs.
- [Gravel Calculator](https://viralrang.com/home/gravel-calculator): Cubic yards and tons for any area and depth — loose fill or compacted base.
- [Topsoil Calculator](https://viralrang.com/home/topsoil-calculator): Cubic yards and bags for beds, lawns, and topdressing — with the right depth for each job.
- [Concrete Calculator](https://viralrang.com/home/concrete-calculator): Slab volume in cubic yards and bags — with the order margin that prevents a short pour.
- [Wallpaper Calculator](https://viralrang.com/home/wallpaper-calculator): Rolls to buy for any room — pattern repeat and double-roll math handled for you.
- [Drywall Calculator](https://viralrang.com/home/drywall-calculator): Sheets for walls and ceiling with waste included — plus screws, tape, and mud guidance.
- [Fence Calculator](https://viralrang.com/home/fence-calculator): Posts, panels, and gates for any run — with spacing and corner math done right.
- [BTU Calculator](https://viralrang.com/home/btu-calculator): The right AC size for any room — Energy Star base, sun, ceiling height, and occupancy included.
- [Grass Seed Calculator](https://viralrang.com/home/grass-seed-calculator): Pounds of seed for a new lawn or overseeding — rates for five common US grasses.
- [Roofing Calculator](https://viralrang.com/home/roofing-calculator): Roof area from the footprint and the pitch, then squares and bundles of shingles.
- [Deck Calculator](https://viralrang.com/home/deck-calculator): Deck boards, joists and fasteners from the deck size, board width and gap.
- [Carpet Calculator](https://viralrang.com/home/carpet-calculator): Carpet area with waste, and how the roll width decides where the seams land.
- [Insulation Calculator](https://viralrang.com/home/insulation-calculator): How much insulation an area takes at a target R-value, in batts or blown depth.
- [Stair Calculator](https://viralrang.com/home/stair-calculator): Rise, run and stringer length from a floor-to-floor height, against the code limits.
- [Pool Volume Calculator](https://viralrang.com/home/pool-volume-calculator): Pool volume in gallons or litres, including the sloping floor most pools have.
- [Board Foot Calculator](https://viralrang.com/home/board-foot-calculator): Board feet for hardwood priced by volume, where nominal and actual sizes differ.
- [Trip Budget Calculator](https://viralrang.com/travel/trip-budget-calculator): Estimate the all-in cost of a trip — flights, lodging, daily spending, and a buffer — split per person and per day.
- [Fuel Cost Calculator](https://viralrang.com/travel/fuel-cost-calculator): Fuel cost for any drive — distance, MPG, and today’s gas price, with round-trip and per-person split.
- [Carry-On Size Checker](https://viralrang.com/travel/carry-on-size-checker): Check if your bag fits the carry-on limit — any airline, any orientation, with per-side overage detail.
- [Jet Lag Calculator](https://viralrang.com/travel/jet-lag-calculator): Estimate recovery days for any trip — east or west — plus light and pre-shift sleep guidance.
- [Travel Adapter Finder](https://viralrang.com/travel/travel-adapter-finder): Find the plug type and voltage for 50+ countries — and whether US devices need just an adapter or a converter.
- [Hotel vs Vacation Rental](https://viralrang.com/travel/hotel-vs-rental-calculator): Compare a hotel and a rental all-in — taxes, fees, and cleaning included — with the breakeven night.
- [Cups to Grams Converter](https://viralrang.com/cooking/cups-to-grams): Convert cups to grams for 14 common baking ingredients — flour, sugar, butter, and more — with a one-tap swap.
- [Cups of Flour to Grams](https://viralrang.com/cooking/cups-of-flour-to-grams): Convert cups of all-purpose flour to grams — the ingredient where weighing matters most.
- [Cups of Sugar to Grams](https://viralrang.com/cooking/cups-of-sugar-to-grams): Convert cups of granulated sugar to grams — the one ingredient volume measures reliably.
- [Cups of Brown Sugar to Grams](https://viralrang.com/cooking/cups-of-brown-sugar-to-grams): Convert cups of packed brown sugar to grams — and what “packed” actually means.
- [Cups of Powdered Sugar to Grams](https://viralrang.com/cooking/cups-of-powdered-sugar-to-grams): Convert cups of unsifted powdered sugar to grams — sifting drops the weight about 20%.
- [Cups of Butter to Grams](https://viralrang.com/cooking/cups-of-butter-to-grams): Convert cups of butter to grams — and the US stick system (1 stick = ½ cup = 113 g).
- [Cups of Honey to Grams](https://viralrang.com/cooking/cups-of-honey-to-grams): Convert cups of honey to grams — where weighing beats wrestling a sticky measuring cup.
- [Cups of Oats to Grams](https://viralrang.com/cooking/cups-of-oats-to-grams): Convert cups of rolled oats to grams — and why rolled, quick, and steel-cut differ.
- [Cups of Rice to Grams](https://viralrang.com/cooking/cups-of-rice-to-grams): Convert cups of uncooked white rice to grams — and the cooked-vs-uncooked trap.
- [Oven Temperature Converter](https://viralrang.com/cooking/oven-temperature-converter): Convert oven temperatures between °F and °C — with the fan/convection adjustment and gas-mark notes.
- [Recipe Scaler](https://viralrang.com/cooking/recipe-scaler): Scale every quantity in a recipe to the number of servings you actually want.
- [Baking Pan Size Converter](https://viralrang.com/cooking/baking-pan-size-converter): Swap one pan for another by area and volume, and know what it does to the bake.
- [Butter Converter](https://viralrang.com/cooking/butter-converter): Sticks, tablespoons, cups, grams and ounces of butter, all from one figure.
- [Roasting Time Calculator](https://viralrang.com/cooking/roasting-time-calculator): An estimated roasting time from weight, next to the internal temperature that actually decides it.
- [Yeast Converter](https://viralrang.com/cooking/yeast-converter): Active dry, instant and fresh yeast swapped for one another, with what changes in the method.
- [BMR Calculator](https://viralrang.com/health/bmr-calculator): Calories your body burns at complete rest — the Mifflin-St Jeor basal metabolic rate.
- [TDEE Calculator](https://viralrang.com/health/tdee-calculator): Maintenance calories — your BMR scaled by activity, the number to plan around.
- [Body Fat Percentage Calculator](https://viralrang.com/health/body-fat-calculator): Estimate body fat from a tape measure — the US Navy circumference method, with neutral reference bands.
- [Ideal Weight Calculator](https://viralrang.com/health/ideal-weight-calculator): A reference weight range from four classic formulas — a spread, never a single target.
- [Water Intake Calculator](https://viralrang.com/health/water-intake-calculator): A daily water target from your weight, activity, and climate — in liters, cups, and ounces.
- [Protein Intake Calculator](https://viralrang.com/health/protein-intake-calculator): Daily protein in grams from your weight and goal — with the goal’s evidence range.
- [One Rep Max Calculator](https://viralrang.com/health/one-rep-max-calculator): Estimate your 1RM from reps — Epley and Brzycki, plus a %-of-1RM table for programming.
- [Pace Calculator](https://viralrang.com/health/pace-calculator): Running pace per km and per mile from distance and time — plus speed in km/h and mph.
- [BMI Calculator](https://viralrang.com/health/bmi-calculator): Body mass index with the WHO band and the healthy weight range for your height, not a single target.
- [Waist-to-Height Ratio Calculator](https://viralrang.com/health/waist-to-height-ratio-calculator): Waist divided by height, the measure NICE puts alongside BMI because BMI cannot see where mass sits.
- [Macro Calculator](https://viralrang.com/health/macro-calculator): Protein, fat and carbs from your calorie target, set in the order that keeps protein from collapsing.
- [Calorie Deficit Calculator](https://viralrang.com/health/calorie-deficit-calculator): How long a given daily deficit takes to reach a target weight, with the straight-line assumption stated.
- [Heart Rate Zone Calculator](https://viralrang.com/health/heart-rate-zone-calculator): Five training zones from Tanaka max heart rate, using heart-rate reserve when you know your resting pulse.
- [Pregnancy Due Date Calculator](https://viralrang.com/health/due-date-calculator): Naegele due date adjusted for your cycle length, with gestational age and the ACOG term windows.
- [Ovulation Calculator](https://viralrang.com/health/ovulation-calculator): The six-day fertile window that ends on ovulation day, projected across your next few cycles.
- [Calories Burned Calculator](https://viralrang.com/health/calories-burned-calculator): Energy cost of an activity from its MET value, your weight and the time spent.
- [Sleep Calculator](https://viralrang.com/health/sleep-calculator): Bedtimes and wake times spaced by sleep cycles, with how variable a cycle really is.
- [Lean Body Mass Calculator](https://viralrang.com/health/lean-body-mass-calculator): Lean mass and fat mass from height and weight, across the published formulas.
- [Steps to Miles Calculator](https://viralrang.com/health/steps-to-miles-calculator): Steps into distance using a stride length from your own height, not an average.
- [Electricity Cost Calculator](https://viralrang.com/energy/electricity-cost-calculator): What any device costs to run — watts, hours, and your rate to dollars per day, month, or year.
- [Appliance Energy Use Calculator](https://viralrang.com/energy/appliance-energy-calculator): See what each appliance adds to your bill — pick a common preset or enter your own watts.
- [kWh to Watts Calculator](https://viralrang.com/energy/kwh-to-watts-calculator): Turn kilowatt-hours and a time span into average watts — the power-versus-energy conversion.
- [Watts to Amps Calculator](https://viralrang.com/energy/watts-to-amps-calculator): Amps from watts and volts — the breaker-and-wire-sizing question, with the 80% circuit rule.
- [Amps to Watts Calculator](https://viralrang.com/energy/amps-to-watts-calculator): Watts from amps and volts — what a circuit or outlet can actually power, safely.
- [Solar Panel Output Calculator](https://viralrang.com/energy/solar-panel-output-calculator): Estimate daily, monthly, and yearly production from system size, sun hours, and losses.
- [Solar Panel Count Calculator](https://viralrang.com/energy/solar-panel-count-calculator): How many panels to cover your usage — by monthly kWh, sun hours, and panel wattage.
- [Energy Bill Estimator](https://viralrang.com/energy/energy-bill-estimator): Build your monthly bill from usage, rate, fixed charges, and tax — and the true all-in $/kWh.
- [kWh to Amps Calculator](https://viralrang.com/energy/kwh-to-amps-calculator): Energy and a time span to average current — the two-step kWh → watts → amps conversion.
- [Volts to Watts Calculator](https://viralrang.com/energy/volts-to-watts-calculator): Watts from volts and amps — for battery, automotive 12 V, and solar-string systems where voltage is known.
- [Watts to Volts Calculator](https://viralrang.com/energy/watts-to-volts-calculator): Back out an unknown supply voltage from a measured load — the third leg of the W = V × A triangle.
- [Battery Life Calculator](https://viralrang.com/energy/battery-life-calculator): Runtime from capacity, load, and usable depth of discharge — lead-acid 50%, lithium 80%.
- [Battery Watt-Hours Calculator](https://viralrang.com/energy/battery-watt-hours-calculator): Amp-hours × volts to watt-hours — the only fair way to compare batteries of different voltages.
- [Generator Size Calculator](https://viralrang.com/energy/generator-size-calculator): The right generator wattage — running watts plus one starting surge, with 20% headroom.
- [EV Charging Cost Calculator](https://viralrang.com/energy/ev-charging-cost-calculator): What it costs to charge — battery size, the 20–80% window, your rate, and charging losses.
- [Heating Cost Calculator](https://viralrang.com/energy/heating-cost-calculator): What electric heating costs to run — and why every 1,500 W resistance heater costs the same.
- [Solar Battery Bank Size Calculator](https://viralrang.com/energy/solar-battery-bank-calculator): Size an off-grid or backup battery bank — usage, days of autonomy, voltage, and usable depth.
- [Watt to kWh Calculator](https://viralrang.com/energy/watts-to-kwh-calculator): Turn watts and hours into kilowatt-hours — the building block behind every cost calc.
- [Energy Savings Calculator](https://viralrang.com/energy/energy-savings-calculator): Dollars saved by replacing a device with an efficient one — annual, monthly, and kWh.
- [LED Savings Calculator](https://viralrang.com/energy/led-savings-calculator): What a whole-house switch to LED bulbs saves — by bulb count, wattage, and hours.
- [Power Factor Calculator](https://viralrang.com/energy/power-factor-calculator): Power factor and reactive power from real watts and apparent VA — the power triangle.
- [Voltage Drop Calculator](https://viralrang.com/energy/voltage-drop-calculator): Voltage lost over a wire run — current, distance, gauge, with the 3%/5% verdict.
- [Electricity Usage Calculator](https://viralrang.com/energy/electricity-usage-calculator): How much energy a device uses — watts, hours, and days to kWh, no dollars.
- [Cost Per kWh Calculator](https://viralrang.com/energy/cost-per-kwh-calculator): Your true all-in electricity rate — divide a bill total by the kWh used.
- [Heat Pump Savings Calculator](https://viralrang.com/energy/heat-pump-savings-calculator): What a heat pump saves vs resistance heat — the COP cuts the electricity to a fraction.
- [Natural Gas Cost Calculator](https://viralrang.com/energy/natural-gas-cost-calculator): Estimate a gas bill from therms and your rate — with the true all-in cost per therm.
- [Gas vs Electric Heating Calculator](https://viralrang.com/energy/gas-vs-electric-heating-calculator): Which is cheaper to heat with — same useful heat, gas furnace vs heat pump or resistance.
- [Water Heating Cost Calculator](https://viralrang.com/energy/water-heating-cost-calculator): What it costs to heat your hot water — gallons, temperature rise, and resistance vs heat pump.
- [Phantom Load Calculator](https://viralrang.com/energy/phantom-load-calculator): What standby (vampire) power costs a year — devices, watts idle, and your rate.
- [kWh to BTU Calculator](https://viralrang.com/energy/kwh-to-btu-calculator): Convert kilowatt-hours to BTU — bridge the electric and heating/cooling worlds.
- [BTU to kWh Calculator](https://viralrang.com/energy/btu-to-kwh-calculator): Convert BTU to kilowatt-hours — turn a heat-energy figure into the energy your meter counts.
- [Demand Charge Calculator](https://viralrang.com/energy/demand-charge-calculator): A commercial bill — a per-kW demand charge on your peak plus per-kWh energy, with the demand share.
- [Percentage Calculator](https://viralrang.com/finance/percentage-calculator): The three everyday percentage questions in one tool — X% of Y, X is what % of Y, and percent change.
- [Tip Calculator](https://viralrang.com/finance/tip-calculator): Tip, total, and the per-person split — pick 15/18/20/25% or enter your own.
- [Discount Calculator](https://viralrang.com/finance/discount-calculator): The sale price after a percentage off — with optional sales tax applied after the discount.
- [Sales Tax Calculator](https://viralrang.com/finance/sales-tax-calculator): Add sales tax to a price, or back it out of a tax-included total to find the pre-tax amount.
- [Markup / Margin Calculator](https://viralrang.com/finance/markup-margin-calculator): Price, profit, markup, and margin from your cost — set the price by markup %, margin %, or a target price.
- [Hourly to Salary Calculator](https://viralrang.com/finance/hourly-to-salary-calculator): Convert an hourly rate to annual, monthly, and weekly pay — or a salary back to an hourly rate.
- [Bill Split Calculator](https://viralrang.com/finance/bill-split-calculator): Split a group bill evenly with tip — the per-person number front and center.
- [Simple Interest Calculator](https://viralrang.com/finance/simple-interest-calculator): Interest and total from principal, rate, and time — simple interest, not compound.
- [Compound Interest Calculator](https://viralrang.com/finance/compound-interest-calculator): Growth with interest on interest — principal, rate, time, compounding frequency, and optional monthly deposits.
- [Loan Payment Calculator](https://viralrang.com/finance/loan-payment-calculator): Monthly payment, total interest, and total paid on any fixed-rate loan — auto, personal, or student.
- [Car Loan Calculator](https://viralrang.com/finance/car-loan-calculator): Monthly auto payment from price, down payment, trade-in, rate, term, and tax — with the amount financed.
- [Savings Goal Calculator](https://viralrang.com/finance/savings-goal-calculator): How much to save each month to hit a goal — or how long a fixed deposit takes — with compound growth.
- [ROI Calculator](https://viralrang.com/finance/roi-calculator): Return on investment and net profit — plus the annualized rate when you add a holding period.
- [Inflation Calculator](https://viralrang.com/finance/inflation-calculator): What inflation does to buying power — and the future dollars needed to match today’s value.
- [Take-Home Pay Calculator](https://viralrang.com/finance/take-home-pay-calculator): A rough take-home estimate per paycheck from gross salary, pay frequency, and a combined deduction rate.
- [Break-Even Calculator](https://viralrang.com/finance/break-even-calculator): The units and revenue to cover your costs — fixed costs over the contribution margin per unit.
- [Mortgage Calculator](https://viralrang.com/finance/mortgage-calculator): Monthly payment, PMI drop-off, and 5/1 ARM cap math — down to the dollar.
- [Credit Card Payoff Calculator](https://viralrang.com/finance/credit-card-payoff-calculator): How long a balance really takes to clear, and what the minimum payment costs you.
- [Amortization Schedule Calculator](https://viralrang.com/finance/amortization-schedule-calculator): The full payment table, and what one extra payment a year actually removes.
- [Debt Payoff Calculator](https://viralrang.com/finance/debt-payoff-calculator): Snowball against avalanche on your own debts, with the real cost of each order.
- [Rent vs Buy Calculator](https://viralrang.com/finance/rent-vs-buy-calculator): The monthly comparison and the break-even year, with the costs people forget included.
- [Unit Price Calculator](https://viralrang.com/finance/unit-price-calculator): Price per unit across different package sizes, so the bigger box is not assumed cheaper.
- [CAGR Calculator](https://viralrang.com/finance/cagr-calculator): Compound annual growth rate from a start value, an end value and a number of years.
- [Budget Calculator](https://viralrang.com/finance/budget-calculator): The 50/30/20 split on your own take-home pay, with the categories spelled out.
- [Age Calculator](https://viralrang.com/date/age-calculator): Your exact age in years, months, and days — plus total days lived and the countdown to your next birthday.
- [Date Difference Calculator](https://viralrang.com/date/date-difference-calculator): How many days between two dates — with the weeks, months, and working-day counts alongside.
- [Age Difference Calculator](https://viralrang.com/date/age-difference-calculator): The exact gap between two birthdays, in years, months, and days — and who is older.
- [Working Days Calculator](https://viralrang.com/date/workdays-calculator): Monday-to-Friday days between two dates, with the weekend and calendar totals to check it against.
- [Days Until Calculator](https://viralrang.com/date/days-until-calculator): Days from today to any date, broken into weeks, months and Monday-to-Friday business days.
- [Date Add and Subtract Calculator](https://viralrang.com/date/date-add-subtract-calculator): Add or subtract years, months, weeks and days, in calendar days or business days only.
- [Day of the Week Calculator](https://viralrang.com/date/day-of-week-calculator): What weekday any date fell on, plus its day of year, ISO week, quarter and leap-year status.
- [Time Duration Calculator](https://viralrang.com/date/time-duration-calculator): Hours and minutes between two clock times, less an unpaid break, in decimal hours for payroll.
- [Week Number Calculator](https://viralrang.com/date/week-number-calculator): The ISO 8601 week number for any date, including the years where 1 January belongs to week 53.
- [Leap Year Calculator](https://viralrang.com/date/leap-year-calculator): Whether a year is a leap year, which rule decided it, and the nearest leap years either side.
- [Time Zone Converter](https://viralrang.com/date/time-zone-converter): A time in one city read in another, with the clock changes either side and the hours that do not exist.
- [Kg to Lbs Converter](https://viralrang.com/convert/kg-to-lbs): Convert kilograms to pounds — body weight, luggage, and gym plates, with a one-tap swap.
- [Lbs to Kg Converter](https://viralrang.com/convert/lbs-to-kg): Convert pounds to kilograms — shipping, international forms, and equipment specs.
- [Cm to Inches Converter](https://viralrang.com/convert/cm-to-inches): Convert centimeters to inches — height, screen sizes, and product dimensions.
- [Inches to Cm Converter](https://viralrang.com/convert/inches-to-cm): Convert inches to centimeters — furniture, parcels, and clothing measurements.
- [Km to Miles Converter](https://viralrang.com/convert/km-to-miles): Convert kilometers to miles — race distances, road signs, and trip odometers.
- [Miles to Km Converter](https://viralrang.com/convert/miles-to-km): Convert miles to kilometers — marathons, road trips abroad, and run logs.
- [Celsius to Fahrenheit Converter](https://viralrang.com/convert/celsius-to-fahrenheit): Convert Celsius to Fahrenheit — weather, cooking, and thermostat settings.
- [Fahrenheit to Celsius Converter](https://viralrang.com/convert/fahrenheit-to-celsius): Convert Fahrenheit to Celsius — fevers, recipes, and forecasts abroad.
- [Liters to Gallons Converter](https://viralrang.com/convert/liters-to-gallons): Convert liters to US gallons — fuel fills, aquariums, and container sizes.
- [Gallons to Liters Converter](https://viralrang.com/convert/gallons-to-liters): Convert US gallons to liters — tanks, recipes, and specs sold in liters.
- [MPG to L/100km Converter](https://viralrang.com/convert/mpg-to-l-per-100km): Convert US MPG to L/100km — read a car’s economy the way the rest of the world quotes it.
- [L/100km to MPG Converter](https://viralrang.com/convert/l-per-100km-to-mpg): Convert L/100km to US MPG — turn a European economy figure into miles per gallon.
- [MPH to KM/H Converter](https://viralrang.com/convert/mph-to-kmh): Miles per hour to kilometers per hour, with the speed limits you will actually meet.
- [KM/H to MPH Converter](https://viralrang.com/convert/kmh-to-mph): Kilometers per hour to miles per hour — read a metric speed limit in your own units.
- [Square Feet to Square Meters Converter](https://viralrang.com/convert/square-feet-to-square-meters): Floor area from sq ft to m² — the number every listing outside the US quotes.
- [Square Meters to Square Feet Converter](https://viralrang.com/convert/square-meters-to-square-feet): Floor area from m² to sq ft — sizing a metric listing in US terms.
- [Acres to Hectares Converter](https://viralrang.com/convert/acres-to-hectares): Land area from acres to hectares, with the exact survey-derived factor.
- [Hectares to Acres Converter](https://viralrang.com/convert/hectares-to-acres): Land area from hectares to acres — a hectare is just under two and a half acres.
- [MB to GB Converter](https://viralrang.com/convert/mb-to-gb): Megabytes to gigabytes — and why your drive shows less than the box promised.
- [GB to MB Converter](https://viralrang.com/convert/gb-to-mb): Gigabytes to megabytes — sizing a data plan, a download, or a backup.
- [Minutes to Hours Converter](https://viralrang.com/convert/minutes-to-hours): Minutes to hours as a decimal — the format timesheets and payroll expect.
- [Hours to Minutes Converter](https://viralrang.com/convert/hours-to-minutes): Hours to minutes, including the decimal hours a timesheet hands you.
- [Length Converter](https://viralrang.com/convert/length-converter): Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
- [Weight Converter](https://viralrang.com/convert/weight-converter): Convert between milligrams, grams, kilograms, tonnes, ounces, pounds, stone, and both kinds of ton.
- [Volume Converter](https://viralrang.com/convert/volume-converter): Convert between milliliters, liters, cubic meters, and both the US and imperial cups, pints, quarts, and gallons.
- [Time Converter](https://viralrang.com/convert/time-converter): Convert between milliseconds, seconds, minutes, hours, days, weeks, months, and years — with instant-answer pages for the common ones.
- [Feet to Meters Converter](https://viralrang.com/convert/feet-to-meters): Convert feet to meters — ceiling heights, room dimensions, and depths quoted the other way.
- [Meters to Feet Converter](https://viralrang.com/convert/meters-to-feet): Convert meters to feet — heights, room sizes, and spec sheets written in metric.
- [Yards to Meters Converter](https://viralrang.com/convert/yards-to-meters): Convert yards to meters — track distances, fabric, and field measurements.
- [Meters to Yards Converter](https://viralrang.com/convert/meters-to-yards): Convert meters to yards — swimming pools, athletics, and fabric bought abroad.
- [Mm to Inches Converter](https://viralrang.com/convert/mm-to-inches): Convert millimeters to inches — hardware, drill bits, screens, and drawings.
- [Inches to Mm Converter](https://viralrang.com/convert/inches-to-mm): Convert inches to millimeters — metric hardware, tooling, and machine specs.
- [Grams to Ounces Converter](https://viralrang.com/convert/grams-to-ounces): Convert grams to ounces — postage, ingredients, and product weights in metric.
- [Ounces to Grams Converter](https://viralrang.com/convert/ounces-to-grams): Convert ounces to grams — recipes, shipping weights, and scales set to metric.
- [Stone to Pounds Converter](https://viralrang.com/convert/stone-to-pounds): Convert stone to pounds — the UK and Irish body-weight unit, read in US pounds.
- [Pounds to Stone Converter](https://viralrang.com/convert/pounds-to-stone): Convert pounds to stone and pounds — the reading a UK or Irish scale gives.
- [mL to Fluid Ounces Converter](https://viralrang.com/convert/ml-to-oz): Convert milliliters to US fluid ounces — bottles, cabin-bag limits, and recipes.
- [Fluid Ounces to mL Converter](https://viralrang.com/convert/oz-to-ml): Convert US fluid ounces to milliliters — metric measuring jugs and bottle labels.
- [Tablespoons to Cups Converter](https://viralrang.com/convert/tbsp-to-cups): Convert tablespoons to cups — scaling a recipe without washing another measure.
- [Cups to Tablespoons Converter](https://viralrang.com/convert/cups-to-tbsp): Convert cups to tablespoons — measuring a part-cup when the cup measure is dirty.
- [Word Counter](https://viralrang.com/utilities/word-counter): Live word, character, sentence, and paragraph counts, plus reading and speaking time.
- [Password Generator](https://viralrang.com/utilities/password-generator): Strong random passwords generated in your browser, with the entropy behind the strength rating.
- [QR Code Generator](https://viralrang.com/utilities/qr-code-generator): Turn a link or any text into a scannable QR code and download it as a clean vector SVG.
- [Character Counter](https://viralrang.com/utilities/character-counter): Characters as a human counts them and as a computer stores them, against each platform limit.
- [Case Converter](https://viralrang.com/utilities/case-converter): Ten casing styles including a Title Case that keeps short function words lowercase.
- [URL Slug Generator](https://viralrang.com/utilities/slug-generator): Clean URL slugs that transliterate letters instead of silently deleting them.
- [Random Number Generator](https://viralrang.com/utilities/random-number-generator): Cryptographic random numbers with rejection sampling, so no value is quietly favoured.
- [Lorem Ipsum Generator](https://viralrang.com/utilities/lorem-ipsum-generator): Placeholder paragraphs, sentences or words from the Cicero passage the text actually comes from.
- [Unix Timestamp Converter](https://viralrang.com/utilities/unix-timestamp-converter): Epoch seconds to a readable date and back, in UTC and in your own time zone.
- [Roman Numeral Converter](https://viralrang.com/utilities/roman-numeral-converter): Numbers to Roman numerals and back, using the standard subtractive notation.
- [Number Base Converter](https://viralrang.com/utilities/number-base-converter): Binary, octal, decimal and hex side by side, plus any base from 2 to 36.
- [Base64 Encoder and Decoder](https://viralrang.com/utilities/base64-encoder-decoder): Encode text to Base64 or decode it back, with the URL-safe alphabet as an option.
- [URL Encoder and Decoder](https://viralrang.com/utilities/url-encoder-decoder): Percent-encode a query value or decode one, with the component and full-URL rules kept apart.
- [JSON Formatter and Validator](https://viralrang.com/utilities/json-formatter): Pretty-print or minify JSON, with the parse error pointed at the line that broke it.
- [UUID Generator](https://viralrang.com/utilities/uuid-generator): Version 4 UUIDs from the browser cryptographic random source, in bulk if you need them.
- [Color Converter](https://viralrang.com/utilities/color-converter): HEX, RGB and HSL of the same color at once, with the contrast against black and white.
- [Aspect Ratio Calculator](https://viralrang.com/utilities/aspect-ratio-calculator): Hold a ratio while you change one side, and see the simplified ratio of any size.

## Guides

- [How Are Loan Payments Calculated? Amortization, Explained](https://viralrang.com/blog/how-are-loan-payments-calculated): One level payment, front-loaded interest — the formula worked by hand, the two levers you control, and why the smaller payment is often the costlier loan.
- [How Does Inflation Work? The Math That Shrinks Money](https://viralrang.com/blog/how-does-inflation-work): One growth factor, two answers — what today's money will buy later, and how many future dollars it takes to keep up.
- [How Is Sales Tax Calculated? Rates, Rules, and the Reverse Math](https://viralrang.com/blog/how-is-sales-tax-calculated): The combined-rate reality, the one-multiplication forward formula, and the division that pulls the tax back out of any total.
- [How Many Grams in a Cup? Every Ingredient, One Chart](https://viralrang.com/blog/how-many-grams-in-a-cup): One formula, fourteen densities. Why flour is 120 g, honey is 340 g, and the ingredient — not the cup — decides the number.
- [How Many Solar Panels Do I Need? Sizing From Your Real Usage](https://viralrang.com/blog/how-many-solar-panels-do-i-need): Daily usage divided by what one kilowatt makes in a day, why sun hours dominate the count, and the wattage trade that saves a tight roof.
- [How Much Does Heating Cost? By Fuel, Per Month, With Math](https://viralrang.com/blog/how-much-does-heating-cost): The watts-times-hours formula, the $63 default month, why every 1,500 W heater costs the same to run, and where gas and heat pumps land.
- [How Much Does It Cost to Charge an EV? Home vs Public, Per Mile](https://viralrang.com/blog/how-much-does-it-cost-to-charge-an-ev): The three-line formula, the losses you pay for but never keep, and why home charging beats public by two to four times.
- [How Much Protein Do I Need a Day? Grams by Goal and Body Weight](https://viralrang.com/blog/how-much-protein-do-i-need): Your weight in kilograms times a goal factor. The factor is the whole story — and the range matters more than the number.
- [How Much Should You Tip? Rates by Situation, With the Math](https://viralrang.com/blog/how-much-should-you-tip): The customary rates by setting, the three-line formula, and the split order that keeps the tip at the rate you chose.
- [How Much Water Should You Drink a Day? Real Numbers, Not the 8-Glass Myth](https://viralrang.com/blog/how-much-water-should-i-drink-a-day): A baseline from your body weight, two flat top-ups for activity and heat — and why the eight-glass rule is one specific person's answer.
- [How Much Will Gas Cost for My Trip? Road-Trip Fuel Math](https://viralrang.com/blog/how-much-will-gas-cost-for-my-trip): Three numbers set the fuel bill: miles driven, the MPG you actually get, and today's price. Most bad estimates get the middle one wrong.
- [How to Calculate a Discount: Sale Prices, Stacked Deals, and Tax](https://viralrang.com/blog/how-to-calculate-a-discount): The percent-off formula, the sequential math behind stacked deals, and the discount-then-tax order the register actually uses.
- [How to Calculate Body Fat Percentage: Tape-Measure Math That Works](https://viralrang.com/blog/how-to-calculate-body-fat-percentage): Three tape measurements, one logarithmic formula, a neutral reference band — and why the free method holds up against a lab scan.
- [How to Calculate Take-Home Pay: From Gross to What You Keep](https://viralrang.com/blog/how-to-calculate-take-home-pay): One combined deduction rate, your pay schedule, and a two-minute pay stub calibration — gross to net in two lines of math.
- [What Is TDEE? Total Daily Energy Expenditure, With Real Numbers](https://viralrang.com/blog/what-is-tdee): The resting floor, the activity multiplier that scales it, and how to read the maintenance number that comes out.
- [What Size Generator Do I Need? Wattage by Scenario](https://viralrang.com/blog/what-size-generator-do-i-need): Running watts plus one surge, times 1.2. The honest tally that gets it right, and the mistake that stalls a generator the moment the compressor kicks in.
- [How Does Compound Interest Work? The Math That Grows Money](https://viralrang.com/blog/how-does-compound-interest-work): Interest that earns interest — the formula, the frequency gap, and why steady deposits and time do most of the work.
- [How Many Rolls of Wallpaper Do I Need? Pattern Repeat Math](https://viralrang.com/blog/how-many-rolls-of-wallpaper-do-i-need): The wall-area takeoff, the usable yield of a roll, and why the pattern repeat decides your order.
- [How Many Tiles Do I Need? Sizes, Waste & Boxes](https://viralrang.com/blog/how-many-tiles-do-i-need): The formula, the waste allowance that actually fits your layout, and how to turn a tile count into whole boxes.
- [How Much Does Electricity Cost? Reading Your Bill in kWh](https://viralrang.com/blog/how-much-does-electricity-cost): The kWh formula, the rate your bill actually charges, and what a heater, an always-on device, and standby power really cost.
- [How Much Drywall Do I Need? Sheets, Mud & Screws](https://viralrang.com/blog/how-much-drywall-do-i-need): The area formula with the standard opening deductions, the sheet-size trade-off, and the mud, tape and screw counts that go with it.
- [How Much Fencing Do I Need? Posts, Panels & Gates](https://viralrang.com/blog/how-much-fencing-do-i-need): One section count drives the whole bill of materials — posts, panels, gates, and the concrete nobody tallies before the store run.
- [How Much Flooring Do I Need? Boxes, Waste & Room Math](https://viralrang.com/blog/how-much-flooring-do-i-need): Floor area is the easy part. Waste tiers, box coverage, and rounding up are where the order goes wrong.
- [How Much Grass Seed Do I Need? Rates by Grass Type](https://viralrang.com/blog/how-much-grass-seed-do-i-need): The rate for every grass type, the half rate for overseeding, and the seeding window that decides whether any of it works.
- [What Is My BMR? Basal Metabolic Rate, Explained With Numbers](https://viralrang.com/blog/what-is-my-bmr): The Mifflin-St Jeor equation, what each input is worth, and why BMR is the floor of your calorie needs — never the budget.
- [What Size Air Conditioner Do I Need? BTU by Room Size](https://viralrang.com/blog/what-size-ac-do-i-need): Floor area gives you the base number. Ceiling height, sun, bodies and a kitchen decide whether you buy that unit or the next one up.
- [How Much Gravel Do I Need? Driveways, Paths & Drainage](https://viralrang.com/blog/how-much-gravel-do-i-need): The volume formula, the tons conversion, and the right depth and stone for every job.
- [How Much Topsoil Do I Need? Lawns, Beds & Topdressing](https://viralrang.com/blog/how-much-topsoil-do-i-need): The volume formula, the right depth for each job, and how topsoil differs from garden soil, compost, and fill dirt.
- [How Much Concrete Do I Need? Slab Math, Bag Counts, and When to Call the Truck](https://viralrang.com/blog/how-much-concrete-do-i-need): Yards and bag counts for real projects — patios, shed slabs, and deck piers — with the ordering math nobody tells you.
- [How Much Mulch Do I Need? Bed-by-Bed Math in Yards and Bags](https://viralrang.com/blog/how-much-mulch-do-i-need): Real numbers for straight beds, curved borders, and tree rings — plus which mulch to actually buy.
- [How to Pest-Proof Your Home Before Vacation](https://viralrang.com/blog/how-to-pest-proof-your-home-before-vacation): Cut off food, moisture, and entry points before you leave — so you come home to your house, not to ants, mice, or pantry moths.
- [How Much Paint Do I Need? The Complete Room-by-Room Guide](https://viralrang.com/blog/how-much-paint-do-i-need): A gallon covers about 350–400 sq ft — but the real number depends on coats, surface, and sheen. Here's how to get it right, with a room-size cheat sheet and the calculator to do the math for you.
- [Black Heart Emoji 🖤 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/black-heart-emoji-meaning): The black heart is the moodiest emoji in the keyboard — it can mean dark humour, grief, edgy affection, or solidarity. One thing it almost never means: hate. Here's how to read 🖤.
- [Blue Heart Emoji 💙 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/blue-heart-emoji-meaning-uses): The blue heart is the calm, loyal, 'I've got your back' heart — trust and friendship more than romance. Here's how to read 💙 in texts, including the friend-zone question, and across every app.
- [Broken Heart Emoji 💔 Meaning: Texting, How to Reply & How to Use It](https://viralrang.com/broken-heart-emoji-meaning): The broken heart is the internet's universal 'it hurts' stamp — real heartbreak, sympathy, or dramatic irony. Here's how to read 💔, how to reply when someone sends it, and how it works across apps.
- [Brown Heart Emoji 🤎 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/brown-heart-emoji-mean): The brown heart is the warm, earthy, comforting heart — cosy affection, and a symbol of solidarity and pride. Here's how to read 🤎 in texts and across every app.
- [Green Heart Emoji 💚 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/green-heart-emoji-meaning): The green heart is the internet's friendliest, most versatile heart — it can mean nature, support, jealousy, or Irish pride. Here's how to read 💚 in texts and across every app.
- [Growing Heart Emoji 💗 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/growing-heart-emoji-meaning): The growing heart is the 'my heart is swelling' emoji — affection that's getting bigger, warmer, stronger. Here's how to read 💗 in texts and across every app.
- [Heart Emoji Meanings: What Every Heart Color & Symbol Means](https://viralrang.com/heart-emoji-meanings): Dozens of heart emoji, each with its own meaning. Here's the complete guide — every colour and every type explained, with a link to a deep dive on each one.
- [Orange Heart Emoji 🧡 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/orange-heart-emoji-meaning): The orange heart is the warm, supportive 'middle child' between yellow friendship and red romance — care without the pressure. Here's how to read 🧡 in texts and across every app.
- [Pink Heart Emoji 🩷 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/pink-heart-emoji-meaning): The pink heart is the soft, sweet, tender heart — gentle affection without the intensity of red. Here's how to read 🩷 in texts, why it's not the Snapchat badge, and how it works everywhere.
- [Purple Heart Emoji 💜 Meaning: BTS, Texting, Snapchat & How to Use It](https://viralrang.com/purple-heart-emoji-meaning): The purple heart means affection, admiration, and compassion — and carries two big extra meanings: BTS's 'I purple you' and the U.S. military medal. Here's how to read 💜.
- [Red Heart Emoji ❤️ Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/red-heart-emoji-meaning): The red heart is the internet's default symbol for love — but its real meaning depends entirely on who sends it and when. Here's how to read ❤️ in texts, on Snapchat, and across every app.
- [Sparkling Heart Emoji 💖 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/sparkling-heart-emoji-meaning): The sparkling heart is the bubbly, glittery, excited-love heart — affection with extra shine. Here's how to read 💖 in texts and across every app.
- [Two Hearts Emoji 💕 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/two-hearts-emoji-meaning): The two hearts emoji is the warm, 'love is in the air' heart — affection, cuteness, and romance. It's also Snapchat's top friendship badge. Here's how to read 💕 everywhere.
- [White Heart Emoji 🤍 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/white-heart-emoji-meaning): The white heart is the soft, pure, minimalist heart — gentle affection, peace, and sympathy. Here's how to read 🤍 in texts and across every app.
- [Yellow Heart Emoji 💛 Meaning: Texting, Snapchat & How to Use It](https://viralrang.com/yellow-heart-emoji-meaning): The yellow heart is the friendship-and-sunshine heart — happy, warm, and platonic. It's also the one heart with a real Snapchat meaning. Here's how to read 💛 in texts and on Snapchat.
- [Laphing 101: Everything You Need to Know About This Tibetan Delicacy](https://viralrang.com/laphing-101-everything-you-need-to-know-about-this-tibetan-delicacy): Laphing is Tibet's spicy cold-noodle street food — slippery mung-bean jelly noodles in fiery chili sauce. Learn its origins, how it's made, and how to make it at home.

## About

- [About](https://viralrang.com/about): what the site is and the rules it holds itself to
- [Author](https://viralrang.com/author/mohamed-zakrya): who writes and maintains the tools
- [Contact](https://viralrang.com/contact): corrections and questions
- [Privacy](https://viralrang.com/privacy): advertising, analytics, and what leaves your browser
- [Affiliate disclosure](https://viralrang.com/disclosure): how affiliate links are handled