Fuel cost
calculator
Distance, your car's MPG, the price at the pump — that's the whole trip-cost formula. See what the drive costs, per mile and per passenger, before you leave.
The trip-cost triangle
Distance divided by fuel economy gives the gallons; gallons times pump price gives the money. That's every fuel-cost estimate on the planet.
Real-world MPG
Use your actual economy, not the sticker: highway cruising beats the EPA combined figure, while cold starts, roof boxes, and 80 mph headwinds fall short of it. Two fill-ups and the MPG calculator give your true number in five minutes.
Fuel is not the whole cost
Per-mile fuel is the visible slice; tires, maintenance and depreciation typically double-to-triple the true cost of driving a mile — worth remembering when comparing a drive against a flight or a train. Splitting with passengers, though, gas-only is the fair number, and it's computed above. Considering electric? The EV charging calculator runs the same trip on electrons.
Fuel cost FAQ
Divide the distance by your car's MPG to get gallons, then multiply by the price per gallon. 300 miles at 30 MPG and $3.40/gal costs $34.
Your real-world figure — track a couple of tank fills rather than trusting the window sticker. Highway trips usually beat the combined rating; city driving and heavy loads fall below it.
Total fuel divided by people is the standard for shared trips. Some groups add a small per-mile allowance for wear on the driver's car — fuel alone understates their true cost.
Convert economy to L/100km (the MPG calculator does it), then cost = distance ÷ 100 × L/100km × price per liter. The structure is identical.