Fuel economy converter
Convert fuel economy between miles per gallon (US/UK), litres per 100 km and km per litre. Compare efficiency across standards.
- Free, no sign-up
- No data stored
- Reviewed 2026-01-15
Your details
Results
Converted value
43.458606UK
6.5 l/100 km = 43.458606 UK
- Conversion factor
- 1 l/100 km = 282.4809363 UK
- Inverse factor
- 1 UK = 282.4809363 l/100 km
- Scientific
- 4.345861e+1
All units
| Unit | Value | Per one |
|---|---|---|
| Litres per 100 km (l/100 km) | 6.500000 | 1 |
| Kilometres per litre (km/l) | 15.384615 | 100 |
| Miles per gallon (UK) | 43.458606 | 282.4809363 |
| Miles per gallon (US) | 36.186859 | 235.2145833 |
| Miles per litre | 9.559557 | 62.13711922 |
Quick reference
| l/100 km | UK |
|---|---|
| 1 l/100 km | 282.4809 UK |
| 2 l/100 km | 141.2405 UK |
| 5 l/100 km | 56.4962 UK |
| 10 l/100 km | 28.2481 UK |
| 20 l/100 km | 14.1240 UK |
| 25 l/100 km | 11.2992 UK |
| 50 l/100 km | 5.6496 UK |
| 100 l/100 km | 2.8248 UK |
| 500 l/100 km | 0.5650 UK |
| 1,000 l/100 km | 0.2825 UK |
About the Fuel Economy Converter
Convert fuel consumption figures between UK mpg (imperial gallon), US mpg (US gallon), litres per 100 kilometres and kilometres per litre. Note that UK mpg values are higher than US mpg for the same efficiency because the imperial gallon is larger.
How to use the Fuel Economy Converter
- Enter the fuel economy value.
- Select the source unit.
- Select the target unit.
- View the equivalent.
Frequently asked questions
Why are UK and US mpg different?
The UK uses the imperial gallon (4.546 L) while the US uses the US gallon (3.785 L). Same distance, different gallon sizes.
How do I convert mpg to L/100km?
L/100km = 282.481 / UK mpg (or 235.215 / US mpg). Lower L/100km = better efficiency.
Which unit do car manufacturers use?
In Europe: L/100km. In the UK: mpg (imperial). In the US: mpg (US). Japan: km/L.