Fuel Economy Calculator
Calculate fuel consumption, estimate trip fuel cost, and convert fuel economy units. Results update in real-time.
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Typical Fuel Consumption by Vehicle Type
| Vehicle Type | L/100km | MPG (US) |
|---|---|---|
| Compact Car (Civic, Corolla) | 6 - 8 | 29 - 39 |
| Mid-size Sedan (Camry, Accord) | 7 - 9 | 26 - 34 |
| Compact SUV (CR-V, RAV4) | 7 - 10 | 24 - 34 |
| Full-size SUV (Tahoe, Expedition) | 10 - 14 | 17 - 24 |
| Pickup Truck (F-150, Silverado) | 10 - 14 | 17 - 24 |
| Hybrid (Prius, Camry Hybrid) | 4 - 5 | 47 - 59 |
| Plug-in Hybrid (gas mode) | 5 - 7 | 34 - 47 |
Understanding Fuel Economy Units
There are two main ways to measure fuel economy: how much fuel is consumed per distance (L/100km), and how far you can travel per unit of fuel (MPG, km/L). They are inversely related:
- L/100km to MPG (US): MPG = 235.215 / (L/100km)
- L/100km to MPG (UK): MPG = 282.481 / (L/100km)
- L/100km to km/L: km/L = 100 / (L/100km)
- Example: 8 L/100km = 29.4 MPG (US) = 35.3 MPG (UK) = 12.5 km/L
Europe, China, and Australia use L/100km (lower is better). The US uses MPG (higher is better). The UK uses imperial MPG, which is about 20% higher than US MPG for the same consumption.
Tips to Improve Fuel Economy
- Maintain steady speeds; the most efficient range is typically 45-65 mph (70-105 km/h)
- Avoid aggressive acceleration and hard braking — smooth driving saves 10-20% on fuel
- Check tire pressure regularly; under-inflated tires increase fuel consumption by 3-5%
- Remove unnecessary weight; every extra 100 lbs (~45 kg) reduces fuel economy by about 1-2%
- Use cruise control on highways and reduce idling time