Enter the trip distance, your vehicle's fuel efficiency and the fuel price - the fuel needed, total cost and cost per mile or km update as you type. A units dropdown switches between miles + MPG and km + L/100km, a round-trip checkbox doubles the distance, and a travelers field splits the cost per person.
Fuel Cost Calculator
The fuel cost calculator turns three numbers - trip distance, your vehicle's fuel efficiency, and the local fuel price - into the fuel a trip needs and what it costs: per trip, per mile or km, and per person. It works in miles + MPG or km + L/100km, entirely in your browser.
Key features
- US or metric units. Pick miles, MPG and price per gallon, or switch to km, L/100km and price per liter.
- In-place unit conversion. Switching units converts the values you have already typed in place - 300 miles becomes 482.8 km, 30 MPG becomes 7.8 L/100km - so the result stays equivalent instead of resetting.
- Round trip. A round-trip checkbox doubles the distance for the return leg.
- Cost per person. If several people share the ride, enter the traveler count and the total is split per person - handy for carpools and shared road trips.
- Your own currency. The price field takes whatever you pay at the pump; the tool shows plain numbers rather than guessing a currency symbol, and it never fetches live prices.
Private by design
Every calculation runs locally in the page - nothing you enter leaves your device, and no account is needed.
Frequently Asked Questions
What does the fuel cost calculator work out?
From trip distance, fuel efficiency and fuel price it computes the fuel needed (gallons or liters), the total trip fuel cost, the cost per mile or km, and - when you enter more than one traveler - the per-person share. Results update live as you type.
Can I use kilometers and L/100km instead of miles and MPG?
Yes. The units dropdown switches between US (miles, MPG, price per gallon) and metric (km, L/100km, price per liter), and it converts the values already in the form so the result stays equivalent rather than resetting.
Does the tool fetch live fuel prices?
No. You enter the price you actually pay, in your own currency - that is why the outputs are plain numbers without a currency symbol. Real-world consumption also varies with traffic, terrain and load, so treat the result as a planning estimate.
Is anything I type uploaded?
No. The arithmetic runs in the page itself - distance, efficiency, price and traveler count never leave your device, and no signup is needed.