Mpg to Litres Per 100km
Convert MPG to litres per 100km instantly. Free fuel economy converter for vehicles.
Formula
L/100km = 282.481 / mpg
Common Conversions
How to Convert MPG to L/100km
Formula: L/100km = 282.48 / MPG (using UK gallons), or L/100km = 235.21 / MPG (using US gallons). UK MPG is the standard in the UK; US MPG is used in the US (different gallon size). So 50 UK MPG = 5.65 L/100km; 50 US MPG = 4.70 L/100km. The metric L/100km represents fuel consumed per 100 km traveled - lower is more efficient.
European cars are typically rated in L/100km. UK cars sometimes show both. American cars exclusively show MPG. A 'good' fuel economy in metric: 5-6 L/100km (mid-size petrol), 4-5 L/100km (mid-size diesel), 2-4 L/100km (hybrid). In MPG equivalents: 47-56 UK MPG (40-47 US MPG) is good for petrol cars.
MPG to L/100km Reference
| UK MPG | US MPG | L/100km |
|---|---|---|
| 20 | 16.7 | 14.12 |
| 30 | 25.0 | 9.42 |
| 40 | 33.3 | 7.06 |
| 50 | 41.7 | 5.65 |
| 60 | 50.0 | 4.71 |
| 70 | 58.3 | 4.03 |
| 80 | 66.7 | 3.53 |
| 100 | 83.3 | 2.82 |
Frequently Asked Questions
Why do UK and US MPG differ?
Different gallon sizes: UK gallon = 4.546 L, US gallon = 3.785 L. So UK MPG is about 20% higher than US MPG for the same vehicle. UK car MPG figures are not directly comparable to American figures - always check which system is being quoted.
Is lower L/100km always better?
Yes. L/100km is fuel consumption (lower = more efficient). MPG is fuel economy (higher = more efficient). They're inverse measurements. A car at 4.7 L/100km uses less fuel than one at 7.06 L/100km.
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