Fuel Economy Converter
Convert a fuel economy figure between km/l, miles per gallon (US and UK), and liters per 100km.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Your result
6.667
Converted value
AI explanation
Formula
Converts via km/l as a common intermediate; l/100km is handled as a reciprocal (100 ÷ km/l), since it measures consumption per distance rather than distance per fuel unitWorked example
15 km/l to liters per 100km
| Field | Value |
|---|---|
| Amount | 15 |
| From unit | kmpl |
| To unit | l100km |
| Converted value | 6.6667 |
Assumptions
- US mpg uses the US gallon (3.785411784 liters); UK/imperial mpg uses the larger imperial gallon (4.54609 liters) — the same physical fuel efficiency gives a higher UK mpg number than US mpg.
- l/100km is a consumption figure (lower is more efficient), the opposite direction from km/l and mpg (where higher is more efficient) — the conversion correctly reflects this inverse relationship.
Frequently asked questions
Why is l/100km a "smaller is better" unit while km/l is "bigger is better"?
l/100km measures how much fuel you consume to travel a fixed distance (so less fuel used means a smaller, better number), while km/l measures how far you travel per unit of fuel (so more distance means a bigger, better number) — they're reciprocal measures of the same efficiency.
Why do US and UK mpg figures differ for the same car?
A UK (imperial) gallon is about 20% larger than a US gallon, so the same physical fuel efficiency produces a higher mpg number under the UK convention than the US convention.
Which unit does India use for fuel efficiency?
Km/l is the standard unit used in India and most countries outside the US/UK — manufacturer spec sheets and ARAI test certifications quote mileage in km/l.