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Fuel Economy Calculator
Convert between L/100km, MPG (US), MPG (UK), and km/L.
Inputs
Enter your values below.
Result
Your answer appears here.
Enter values and press Calculate — the result appears here.
How it works
The formula behind this calculator.
L/100km = (fuel / distance) × 100; MPG(US) = mi / gal; L/100km = 235.215 / MPG(US)
- distance, fuel
- Distance covered and fuel used
L/100km and MPG are inverses. To convert MPG(US) to L/100km, divide 235.215 by MPG. To convert MPG(UK), use 282.481.
Example: 500 km on 40 L → 8 L/100km = 29.4 MPG(US)
Ref: ISO 7800 (Road vehicles — Fuel consumption)
Tips
- 💡 L/100 km and MPG are inverses — a 10 L/100 km car is ~23.5 MPG US, ~28.2 MPG UK.
- 💡 To convert MPG US to L/100 km: 235.215 / MPG. MPG UK: 282.481 / MPG.