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Fuel Cost Calculator

Estimate trip fuel use and cost from distance, consumption and price.

Built and maintained by The NumberPrism Editorial TeamEditorial policy

Your details

km
L/100km
/L
people
Results update as you type. The formula and assumptions are explained below the calculator.

Trip fuel cost

$38.25

Fuel used22.5 L
Cost per km$0.13
Cost per person$38.25
Round trip$76.50

Consumption varies with speed, load, terrain and weather. Use a real average from your trip computer.

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How to estimate fuel cost

Use distance, average consumption and the pump price.

1

Enter the distance

Use the route distance, not the odometer.

2

Use real consumption

Take an average from the trip computer or a full-tank calculation.

3

Add other costs

Tolls, parking and wear are separate.

What does this tool do?

Fuel cost is distance multiplied by consumption and price. This calculator uses litres per 100 km and price per litre, and shows the cost per kilometre and per passenger if you split it.

The Formula

Litres = Distance × L/100km ÷ 100; Cost = Litres × Price per litre

Frequently Asked Questions

How do I convert MPG to L/100km?

L/100km = 235.215 ÷ US MPG. For UK MPG, use 282.481 ÷ MPG.

Does this include tolls and parking?

No. Add those separately; they can exceed fuel cost on some routes.