Travel calculators
Plan the trip before you book it — budgets, fuel, packing, and the small decisions that add up.
8 free calculators · updated August 2026
The main divide is between comparing choices and checking a fixed constraint. Hotel vs Vacation Rental exposes taxes, cleaning charges, and the stay length where one option overtakes the other; Carry-On Size & Weight Checker tests each side of a bag, and the scale, rather than treating total dimensions as enough. Fuel Cost Calculator and Mileage Reimbursement Calculator answer different questions—what the drive costs and what a reimbursement policy values it at. Travel Adapter Finder also separates plug shape from voltage compatibility, since fitting the socket does not establish that a device can use the supply.
Trip Budget Calculator
Estimate the all-in cost of a trip — flights, lodging, daily spending, and a buffer — split per person and per day.
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Fuel Cost Calculator
Fuel cost for any drive — distance, MPG, and today’s gas price, with round-trip and per-person split.
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Carry-On Size & Weight Checker
Check your bag against 20 airlines — size and weight cap together, in inches or cm, with per-side overage detail.
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Jet Lag Calculator
Estimate recovery days for any trip — east or west — plus light and pre-shift sleep guidance.
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Travel Adapter Finder
Find the plug type and voltage for 50+ countries — and whether US devices need just an adapter or a converter.
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Hotel vs Vacation Rental
Compare a hotel and a rental all-in — taxes, fees, and cleaning included — with the breakeven night.
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Mileage Reimbursement Calculator
What a drive is worth at the standard rate — and the gap when your employer pays less.
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Per Diem Calculator
A trip of N nights spans N+1 days, and the first and last pay three quarters — the two rules people miss.
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Guides for these tools
Long-form answers behind 3 of the calculators above.
- How Much Will Gas Cost for My Trip? Road-Trip Fuel MathThree numbers set the fuel bill: miles driven, the MPG you actually get, and today's price. Most bad estimates get the middle one wrong.
- Carry-On Weight Limits by Airline: What Each One Actually PublishesThe question assumes a rule that the three largest US airlines do not have. What they publish instead is stranger, and more useful to know.
- How to Claim a Trip Back: Mileage or Actual Cost, Per Diem or ReceiptsA method-first guide to choosing vehicle, meal, and lodging claims that match the claimant, governing rules, and available evidence.