Fuel Economy Calculator
Calculate MPG or L/100km from distance travelled and fuel used.
Your actual fuel economy — calculated from real driving, not the window sticker — is the number that matters for budgeting and comparing vehicles honestly.
MPG vs. L/100km — opposite directions of measurement
MPG measures how far you go per unit of fuel (higher is better). L/100km measures fuel used per fixed distance (lower is better) — the scales run in opposite directions.
Frequently asked questions
Why did my calculated MPG differ from my dashboard estimate?
Dashboard trip computers use real-time sensor estimates that can drift — calculating manually from a full tank fill-up is generally more reliable.
How many L/100km is a "good" fuel economy?
Under about 6 L/100km is considered efficient for most vehicle classes, though it varies by type.