Free tool

Fuel cost for a trip

Estimate fuel cost from the distance, the fuel economy, and the price you type. Miles or kilometers, gallons or litres. Tolls are added once.

Bunk Ledger DeskNotes follow the editorial standards.Updated 21 May 2026

Assumptions

With miles per gallon: gallons = miles ÷ miles per gallon, and fuel cost = gallons × price per gallon.
With litres per 100 km: litres = (L/100 km × kilometres) ÷ 100, and fuel cost = litres × price per litre.
A round trip doubles the distance before that math. It does not double the tolls. Type the tolls for the whole plan.
Kilometres and miles convert at 1.609344 kilometres per mile. A US gallon is 3.785411784 litres. L/100 km and miles per gallon convert with those two factors. The currency label is USD or CAD. This page does not convert one currency into the other.
DEF, idle fuel, out-of-route miles, and grade are not in the figure. Your truck’s real economy is the number you type, not a number this page knows.
The result is a planning total. It is not a tax figure, a settlement, or a reimbursement.

How the trip cost is built

In miles per gallon, divide the miles by the economy you type. That is gallons. Multiply gallons by the price per gallon. Add the tolls you typed. A round trip doubles the distance first. Tolls stay as a single number so you can type the whole trip’s tolls once.

In litres per 100 km, multiply that economy by the kilometres and divide by 100. That is litres. Multiply by the price per litre. Kilometres and miles meet at 1.609344 kilometres per mile. A US gallon is 3.785411784 litres. Switching the unit buttons converts the number you already typed. Switching country does not apply an exchange rate. The USD or CAD label follows the header switch. The Canada starting example is 1,931 km at 34.6 L/100 km. The price in that example is a number you can replace. It is not a pump quote and not a conversion of a US gallon price.

The total leaves out diesel exhaust fluid, fuel burned at idle, and any distance that was not in the box. Hills, wind, and a loaded trailer change the economy. Type the economy you have been seeing, not the one in a brochure. The result is not a tax number and not a settlement.

Related: tire gauges, because a low tire changes the economy this page cannot see.