Fuel Economy Conversion: MPG to L/100km Calculator and Comparison Guide
Convert fuel economy between MPG (US and UK) and L/100km. Compare fuel efficiency standards across countries with our conversion charts and calculator.
Fuel Economy Units Around the World
Different countries measure fuel efficiency differently, which creates confusion when comparing vehicles internationally.
- MPG (miles per gallon) — USA (US gallons) and UK (Imperial gallons)
- L/100km (litres per 100 kilometres) — Europe, Australia, Canada
- km/L (kilometres per litre) — Japan, India, parts of Asia
- US MPG to L/100km: 235.215 / MPG
- UK MPG to L/100km: 282.481 / MPG
- L/100km to US MPG: 235.215 / (L/100km)
- km/L to L/100km: 100 / (km/L)
- Maintain correct tire pressure — under-inflated tires increase fuel use by 3%
- Drive smoothly — aggressive acceleration wastes fuel
- Remove roof racks when not in use — they increase drag
- Use cruise control on highways for consistent speed
Important: Higher MPG = better efficiency, but lower L/100km = better efficiency. They work inversely.
MPG to L/100km Conversion Table
| US MPG | UK MPG | L/100km | km/L |
| 20 | 24 | 11.8 | 8.5 |
| 25 | 30 | 9.4 | 10.6 |
| 30 | 36 | 7.8 | 12.8 |
| 35 | 42 | 6.7 | 14.9 |
| 40 | 48 | 5.9 | 17.0 |
| 45 | 54 | 5.2 | 19.1 |
| 50 | 60 | 4.7 | 21.3 |
| 60 | 72 | 3.9 | 25.5 |
| 80 | 96 | 2.9 | 34.0 |
| 100 | 120 | 2.4 | 42.5 |
| Vehicle Type | L/100km | US MPG | |
| Compact car | 5.5-7.0 | 34-43 | |
| Mid-size sedan | 6.5-8.5 | 28-36 | |
| SUV | 8.0-12.0 | 20-29 | |
| Pickup truck | 10.0-14.0 | 17-24 | |
| Hybrid | 3.5-5.0 | 47-67 | |
| Plug-in hybrid | 1.5-3.0 | 78-157 |
Tips for Better Fuel Economy
For instant fuel economy and volume conversions, use our free Volume Converter.
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