Fuel Economy Converter
Convert MPG, km/L, and L/100km.
MPG (US)
mi/gal
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MPG (UK)
mi/imp gal
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km/L
km/L
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L/100km
L/100km
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Note: L/100km has an inverse relationship with the other units. Higher L/100km means lower fuel economy (more fuel consumed per distance).
Ctrl+Enter to convert from first field
Common Conversions
| MPG (US) | MPG (UK) | km/L | L/100km |
|---|---|---|---|
| 20 | 24.02 | 8.50 | 11.76 |
| 25 | 30.02 | 10.63 | 9.41 |
| 30 | 36.03 | 12.75 | 7.84 |
| 35 | 42.03 | 14.88 | 6.72 |
| 40 | 48.04 | 17.01 | 5.88 |
| 50 | 60.05 | 21.26 | 4.70 |
Frequently Asked Questions
How do I convert MPG to L/100km? +
Divide 235.215 by your MPG (US) value to get L/100km. For example, 30 MPG (US) = 235.215 / 30 = 7.84 L/100km. The relationship is inverse, so higher MPG means lower L/100km.
What is the difference between US MPG and UK MPG? +
A US gallon is 3.785 liters while a UK (imperial) gallon is 4.546 liters. So UK MPG numbers are always higher than US MPG for the same vehicle. Multiply US MPG by 1.20095 to get UK MPG.
Why does L/100km go up when fuel economy goes down? +
L/100km measures fuel consumption (how much fuel you use), while MPG measures fuel economy (how far you go on fuel). They have an inverse relationship. A gas-guzzler has high L/100km but low MPG.
How do I convert km/L to MPG (US)? +
Multiply km/L by 2.35215 to get US MPG. For example, 15 km/L equals about 35.28 MPG (US). Km/L is commonly used in Japan and several South American countries.