Fuel Consumption Converter
Convert between L/100km, MPG (US), MPG (UK), and km/L. Ideal for car comparisons, road trips, and import/export vehicles.
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Fuel Economy Conversion
Quick Examples
Fuel Economy Guide
Common Units (L/100km ↔ MPG ↔ km/L)
- L/100km: Widely used in Europe, Asia, Australia. Lower is better (less fuel for the same distance).
- MPG (US): Miles per US gallon (3.785 L). Higher is better.
- MPG (UK/Imperial): Uses the larger Imperial gallon (4.546 L), so the number is higher than US MPG for the same car.
- km/L: Kilometers traveled per liter. Common in Japan and parts of Asia. Higher is better.
Quick Reference Conversion Table
| L/100km | MPG (US) | MPG (UK) | km/L |
|---|---|---|---|
| 3.0 | 78.4 | 94.2 | 33.33 |
| 4.0 | 58.8 | 70.6 | 25.00 |
| 5.0 | 47.0 | 56.5 | 20.00 |
| 6.0 | 39.2 | 47.1 | 16.67 |
| 7.0 | 33.6 | 40.4 | 14.29 |
| 8.0 | 29.4 | 35.3 | 12.50 |
| 9.0 | 26.1 | 31.4 | 11.11 |
| 10.0 | 23.5 | 28.2 | 10.00 |
Real‑World Factors That Change Fuel Economy
- Driving style: Hard acceleration and high speeds increase consumption.
- Load & aerodynamics: Roof boxes, bike racks, and heavy cargo can reduce MPG by 5–20%.
- Tyre pressure & alignment: Underinflated tires increase rolling resistance.
- Weather & AC usage: Cold starts and constant AC draw reduce efficiency.
- Trip length: Short city trips are less efficient than steady motorway cruising.
Typical Economy by Vehicle Class (estimates)
| Class | L/100km | MPG (US) | MPG (UK) | km/L |
|---|---|---|---|---|
| Small city car (petrol) | 5.5 | 42.8 | 51.4 | 18.18 |
| Family hatchback (diesel) | 4.5 | 52.3 | 62.8 | 22.22 |
| Compact SUV (petrol) | 7.5 | 31.4 | 37.7 | 13.33 |
| Large SUV (petrol) | 9.5 | 24.8 | 29.7 | 10.53 |
| Hybrid sedan | 4.2 | 56.0 | 67.3 | 23.81 |
Example Conversions (step‑by‑step)
- 5.0 L/100km ≈ 47.0 MPG (US) ≈ 56.5 MPG (UK) ≈ 20.00 km/L
- 30 MPG (US) ≈ 7.84 L/100km
- 20 km/L ≈ 5.00 L/100km
Long‑Tail Use Cases
- "compare L/100km to MPG US for used car import 2025"
- "fuel economy calculator for Europe road trip consumption"
- "convert mpg uk to km per liter for Japanese cars"
- "hybrid vs petrol car fuel efficiency comparison table"
Official ratings depend on test cycles: EPA (US), WLTP (EU/UK), and JC08/WTLC (JP). Real‑world results vary by route, weather, load, and driving style.