Math calculator
Fuel Cost Calculator
Estimate trip fuel cost from distance, fuel economy, and price per litre.
How this calculation works
Fuel used (litres) = distance (km) × consumption (L/100 km) ÷ 100; cost = fuel used × price per litre. Use the calculator above to enter your values. Inputs are checked before a result is shown, and calculations run locally in your browser.
300 km at 7 L/100 km and $1.80/L: 21 L and $37.80.
100 km at 8 L/100 km and $1.50/L: 8 L and $12.
450 km at 6 L/100 km and $2/L: 27 L and $54.
Frequently asked questions
How does the fuel cost calculator work?
Fuel used (litres) = distance (km) × consumption (L/100 km) ÷ 100; cost = fuel used × price per litre.
What is an example?
For 300 km at 7 L/100 km and $1.80/L, fuel costs $37.80.
Can I enter decimal values?
Yes. Enter decimal values where appropriate. The calculator checks required inputs and displays a readable result.
Are results rounded?
Results are formatted for readability. Check the displayed formula and units when using the result.
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