Fuel Consumption Calculator
L/100km
8.0
MPG (US)
29.4
km/L
12.5
Cost/100km
$12
Different regions use different standards to measure fuel efficiency. The United States primarily uses MPG (Miles Per Gallon), while most of the world uses the metric system with L/100km (Liters Per 100 Kilometers).
| Measurement | What It Measures | Better = ? |
|---|---|---|
| MPG (US) | Distance traveled per gallon of fuel | Higher is better โ |
| L/100km | Liters of fuel used per 100 km | Lower is better โ |
| km/L | Kilometers traveled per liter of fuel | Higher is better โ |
"Most vehicles achieve peak fuel efficiency between 55-65 mph. Every 5 mph over 60 mph is like paying an extra $0.20 per gallon. Aggressive driving (rapid acceleration and hard braking) can lower your gas mileage by 33% on highways and 5% in the city. Use cruise control on highways to maintain steady speed."
Formula verified against standard references
| MPG (US) | L/100km | km/L | Efficiency |
|---|---|---|---|
| 50 MPG | 4.7 L/100km | 21.3 km/L | Excellent (Hybrid) |
| 30 MPG | 7.8 L/100km | 12.8 km/L | Good (Compact) |
| 20 MPG | 11.8 L/100km | 8.5 km/L | Average (SUV) |
| 15 MPG | 15.7 L/100km | 6.4 km/L | Poor (Truck) |
Good fuel economy depends on vehicle type:
Formula: L/100km = 235.2 รท MPG
For example: 30 MPG = 235.2 รท 30 = 7.84 L/100km
Note that MPG measures distance per fuel (higher is better), while L/100km measures fuel per distance (lower is better). Our Fuel Consumption makes this easy.
EPA ratings are tested in controlled lab conditions. Use the Fuel Consumption above to verify. Real-world MPG is typically 10-30% lower due to:
Highway driving usually gets closer to EPA estimates than city driving.
Best practices to maximize MPG: