Free · No sign-up · Works in your units
Know what your trip will cost before you go.
Clear, honest calculators for fuel, flights versus driving, trip budgets and splitting costs with friends — with every formula explained.
Calculators
Road Trip Fuel Cost Calculator
Fuel and cost for any drive, in mpg or L/100km.
Driving vs Flying Cost Calculator
Compare the full cost of driving and flying, including the hidden extras.
Vacation Budget Calculator
Total trip budget, cost per person and a weekly savings target.
Group Trip Expense Splitter
Who owes whom, settled in the fewest payments.
Accommodation Cost Splitter
Fairly split an Airbnb or hotel by nights and room.
EV Charging Cost Calculator
What an electric road trip costs to charge, losses included.
Cost Per Mile Calculator
The true cost of driving per mile or km — fuel, wear, tolls.
Fuel costs in your country's units
US gallons and UK gallons aren't the same size, and much of the world uses L/100 km. Pick your version so the maths is right.
Formulas shown
Every calculator explains exactly how the result is worked out, with a worked example you can check.
Your prices, not guesses
We never pretend to know today's fuel or flight prices. Defaults are examples you replace with real numbers.
Private by design
No accounts. Inputs stay in your browser. AI explanations are currently disabled.