Fuel Consumption Calculator
Convert distance and fuel used into L/100 km and MPG, and estimate the full cost of a trip including fuel price and tolls.
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How to measure correctly
Fill the tank completely, reset the odometer, drive normally, then fill again to the same level. Consumption = fuel added ÷ distance × 100.
- L/100 km = fuel(L) ÷ distance(km) × 100
- MPG = distance(miles) × 4.546 ÷ litres (imperial)
- City traffic, cold starts and short trips raise consumption
- Correct tyre pressure and a clean air filter help
FAQ
For a modern compact car, 5–7 L/100 km on the motorway is excellent, 7–9 in town is normal. A diesel often beats a petrol in highway economy.
Check: tire pressure, winter tires, loaded roof box, dirty air filter, faulty oxygen sensor, dragging brake, or the way you drive. Also a leaking fuel system.
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