Fuel Cost Calculator

Enter trip distance in kilometres, consumption in litres per 100 km, and the price you pay per litre to see fuel needed, total cost and cost per km.

How it works

Metric fuel economy is usually quoted as litres per 100 kilometres. Litres required are (distance ÷ 100) × consumption; cost is that volume times the pump price. Cost per kilometre is total cost divided by distance. This first version uses km and L/100 km only — not miles per gallon. US and Imperial gallons are different sizes, so mixing them with litres would be misleading.

Formula

Litres = (distance km ÷ 100) × L/100 km
Total cost = litres × price per litre
Cost per km = total cost ÷ distance

Worked examples

100 km, 8 L/100 km, 1.50 per litre → 8 L, cost 12.00, 0.12 per km
250 km, 6.5 L/100 km, 1.80 per litre → 16.25 L, cost 29.25, 0.117 per km

Useful notes

Consumption is L/100 km, the common figure on European and many other dashboards. Lower is more efficient.
The result is a planning estimate. Real use varies with speed, load, weather and driving style.

FAQ

How do I calculate fuel cost for a trip?: Work out litres as (km ÷ 100) × L/100 km, then multiply by the price per litre. For 100 km at 8 L/100 km and 1.50/L that is 8 × 1.50 = 12.
Can I use miles and MPG?: Not on this page. Convert miles to kilometres first if needed. US MPG and Imperial MPG are not interchangeable with L/100 km without stating which gallon you mean.
Does this include tolls or parking?: No. It is fuel only. Add other trip costs separately.

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