Cars & Vehicles
Fuel economy converter
L/100 km ↔ mpg (US/UK) ↔ km/L, exact conversions.
- Instant
- Free
- Private (processed locally)
- No sign-up
Convert fuel economy
Type a value in any field (L/100 km, mpg US, mpg UK or km/L): the others update instantly.
Reference
| L/100 km | mpg US | mpg UK | km/L |
|---|---|---|---|
| 5 | 47.0 | 56.5 | 20.0 |
| 7 | 33.6 | 40.4 | 14.3 |
| 10 | 23.5 | 28.2 | 10.0 |
Exact conversions. 100% local calculation.
Frequently asked questions
Why do US and UK mpg differ?
The US gallon (3.785 L) is smaller than the imperial gallon (4.546 L), so UK mpg is higher for the same consumption.
Which formulas?
mpg US = 235.215 ÷ (L/100km); mpg UK = 282.481 ÷ (L/100km); km/L = 100 ÷ (L/100km).
Lower or higher is better?
In L/100 km, lower is better. In mpg and km/L it is the opposite: higher is better.