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Viralrang

269 free tools ยท no signup

Decide in minutes, not afternoons.

Fast, accurate calculators and converters for home, money, health, energy, travel, and the kitchen โ€” measure, enter, and get a number you can trust.

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10 collections, 269 tools โ€” pick a category to see everything in it.

Home Improvement

Plan the project before you swing the hammer โ€” budgeting, financing, and material math without the spreadsheet.

21 calculators โ†’

Travel

Plan the trip before you book it โ€” budgets, fuel, packing, and the small decisions that add up.

6 calculators โ†’

Cooking & Baking

Cups to grams for real ingredients, plus oven temperatures โ€” weigh it right and bake it at the correct heat.

15 calculators โ†’

Health & Fitness

Calories, body metrics, hydration, protein, and training numbers โ€” clear estimates for general guidance, never medical advice.

19 calculators โ†’

Electricity & Energy

Run-cost, appliance, and solar math in plain dollars โ€” what a device costs, what a system makes, and your bill line by line.

32 calculators โ†’

Finance & Math

Percentages, tips, discounts, tax, markup, pay, and interest โ€” the everyday money math, worked out clearly. General information, not financial advice.

24 calculators โ†’

Dates & Time

Exact ages, gaps between two dates, and working-day counts โ€” calendar math that handles leap years and month lengths so you do not have to.

11 calculators โ†’

Math

Fractions, ratios, averages and the rest of school-and-spreadsheet arithmetic โ€” each one showing the working, not just the answer.

12 calculators โ†’

Unit Converters

Fast, exact unit conversions โ€” metric to imperial and back, each with the real factor and a one-tap swap.

112 calculators โ†’

Utilities

Everyday text and web tools โ€” counting, generating, and encoding. Everything runs in your browser; nothing you type is uploaded.

17 calculators โ†’

A few of the most useful tools across the site to get you started.

Guides & how-tos

Practical answers with the math shown โ€” every guide pairs with a free calculator.

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How Are Loan Payments Calculated? Amortization, Explained

One level payment, front-loaded interest โ€” the formula worked by hand, the two levers you control, and why the smaller payment is often the costlier loan.

July 23, 2026 ยท 13 min read

How Does Inflation Work? The Math That Shrinks Money

One growth factor, two answers โ€” what today's money will buy later, and how many future dollars it takes to keep up.

July 23, 2026 ยท 13 min read

How Is Sales Tax Calculated? Rates, Rules, and the Reverse Math

The combined-rate reality, the one-multiplication forward formula, and the division that pulls the tax back out of any total.

July 23, 2026 ยท 13 min read

How Many Grams in a Cup? Every Ingredient, One Chart

One formula, fourteen densities. Why flour is 120 g, honey is 340 g, and the ingredient โ€” not the cup โ€” decides the number.

July 23, 2026 ยท 14 min read

How Many Solar Panels Do I Need? Sizing From Your Real Usage

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.

July 23, 2026 ยท 13 min read

How Much Does Heating Cost? By Fuel, Per Month, With Math

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.

July 23, 2026 ยท 13 min read