Enter distance, fuel efficiency and fuel price to estimate how much fuel a trip uses and what it costs.
The method behind this calculator
Planning a drive? This fuel cost calculator estimates the fuel a trip needs and the cost. Enter the distance, your vehicle’s efficiency (MPG, km/L or L/100km) and the current fuel price.
It works in both US and metric units, so it suits gallons-and-miles or litres-and-kilometres.
Getting your answer
- Enter the trip distance and choose miles or km.
- Enter your fuel efficiency and its unit.
- Enter the fuel price to see the total trip cost.
The calculation
MPG: fuel = distance ÷ MPG
L/100km: fuel = distance ÷ 100 × L/100km
cost = fuel × price per unit
Worked example
Take the starting scenario, a distance of 300, fuel efficiency of 30, fuel price of 3.5. That gives a trip cost of $35. Underneath, Fuel needed comes out at 10 gal and Cost per mile/km at $0.12. Change any field and every figure updates as you type.
Frequently asked questions
How do I calculate trip fuel cost?
Divide the distance by your fuel efficiency to get the fuel used, then multiply by the price per gallon or litre.
What units does it support?
Miles or kilometres for distance, and MPG, km/L or L/100km for efficiency, so it works in the US and elsewhere.
How can I lower fuel cost?
Steady speeds, correct tyre pressure and less weight all help. A more efficient vehicle makes the biggest long-term difference.