MPG vs L/100km: What's the Difference?
MPG rewards higher numbers; L/100km rewards lower numbers — same physics, different scale.
By Gas Tracker Editorial · Published 2026-02-01 · Updated 2026-03-01
Short answer
MPG = miles per gallon (US). L/100km = liters of fuel per 100 kilometers. They invert the same idea: efficiency vs consumption.
Convert roughly
- L/100km ≈ 235.2 ÷ MPG (US)
- MPG ≈ 235.2 ÷ L/100km
Use the L/100km Calculator for trip inputs.
Which to track?
Use what your dashboard and local pumps use. Gas Tracker AI focuses on US gallons and MPG with calculator support for L/100km.