TravelCostKit is a small, independent collection of travel cost calculators. We built it because most trip calculators either hide their maths, mix up units, or ask for an email before showing a result.
What we stand for
- Correct units. US and UK gallons are different sizes; many countries use L/100 km. Each fuel calculator uses its country's real units.
- Transparent maths. Every page explains the formula and includes a worked example you can check by hand. The calculations are covered by automated tests using those examples.
- No made-up data. We don't show live fuel or flight prices. Defaults are examples, and you enter what you actually pay.
- Free and private. No accounts, no payments. Inputs are stored in your browser. AI explanations are currently disabled; see our privacy policy.
How the site is funded
The site is free to use. In future it may show advertising to cover running costs. Ads will never be required to use a calculator and won't affect results.
Found a mistake?
We take accuracy seriously. If a result looks wrong, please get in touch with the numbers you entered.