UnitConMPG to L/100km Converter
Convert US miles per gallon to liters per 100 kilometers for international car comparisons, fuel economy labels, and road test reviews. The US uses the higher-is-better mpg scale while most of the world uses the lower-is-better L/100km scale.
Formula
Divide 235.215 by US mpg to get L/100km. To reverse, divide 235.215 by L/100km to get US mpg.
Quick reference
| Miles per Gallon (US) (US mpg) | Liter per 100 km (L/100km) |
|---|---|
| 10 | 23.52146 |
| 15 | 15.68097 |
| 20 | 11.76073 |
| 25 | 9.408583 |
| 30 | 7.840486 |
| 35 | 6.720417 |
| 40 | 5.880365 |
| 45 | 5.226991 |
| 50 | 4.704292 |
| 60 | 3.920243 |
About these units
Miles per Gallon (US)
Miles per gallon became the US fuel economy standard with the Energy Policy and Conservation Act of 1975, which mandated EPA fuel economy ratings. It is an efficiency metric where higher numbers indicate better fuel economy.
Liter per 100 km
Liters per 100 kilometers is the EU-mandated fuel consumption metric, expressing how much fuel is consumed per unit distance. Its inverse relationship to mpg means that comparing fuel economy across standards requires the reciprocal formula, not a simple multiplication.
Frequently asked questions
235.215 ÷ 30 ≈ 7.84 L/100km.
235.215 ÷ 6 ≈ 39.2 mpg.
Because mpg and L/100km are inversely related — one measures distance per volume, the other volume per distance. The constant 235.215 equals (3.78541 L/gal × 100 km) ÷ 1.60934 km/mi.