L/100km Calculator — Liters per 100 Kilometers
Calculate your vehicle’s fuel consumption in L/100km from distance driven and fuel used. Also see km/L, MPG (US), MPG (UK), and estimated annual fuel cost.
L/100km Reference Table
| L/100km | km/L | MPG (US) | MPG (UK) | Efficiency Rating |
|---|---|---|---|---|
| 4 | 25.0 | 58.8 | 70.6 | Excellent |
| 5 | 20.0 | 47.0 | 56.5 | Excellent |
| 6 | 16.7 | 39.2 | 47.1 | Good |
| 7 | 14.3 | 33.6 | 40.4 | Good |
| 8 | 12.5 | 29.4 | 35.3 | Average |
| 9 | 11.1 | 26.1 | 31.4 | Average |
| 10 | 10.0 | 23.5 | 28.2 | Average |
| 12 | 8.3 | 19.6 | 23.5 | Below average |
| 15 | 6.7 | 15.7 | 18.8 | Poor |
| 20 | 5.0 | 11.8 | 14.1 | Poor |
MPG (US) = 235.215 ÷ L/100km. MPG (UK) = 282.481 ÷ L/100km. Lower L/100km means better fuel efficiency.
How to Calculate L/100km
To measure your car’s real fuel consumption:
- Fill up the tank completely and note the odometer reading (or reset the trip meter)
- Drive normally until the tank is low
- Fill up again and note how many liters were pumped
- Divide liters by kilometers driven, then multiply by 100
Example: You drove 500 km and used 35 liters. L/100km = (35 ÷ 500) × 100 = 7.0 L/100km.
L/100km vs MPG — Which Is Better?
L/100km measures how much fuel you use (lower is better). MPG measures how far you go on a gallon (higher is better). L/100km is considered more intuitive for comparing costs because it scales linearly — going from 10 to 8 L/100km saves the same amount of fuel as going from 6 to 4.8 L/100km.
With MPG, the relationship is not linear: improving from 15 to 20 MPG saves much more fuel than improving from 35 to 40 MPG, even though both are a 5 MPG improvement.
Frequently Asked Questions
What is L/100km?
L/100km (liters per 100 kilometers) is a metric fuel consumption measure used in most countries outside the US. It tells you how many liters of fuel your vehicle needs to travel 100 km. Lower is better — a car using 6 L/100km is more efficient than one using 10 L/100km.
What is a good L/100km?
For a passenger car, 5-7 L/100km is good, under 5 is excellent (typically hybrids). SUVs average 8-10 L/100km. Pickup trucks and large SUVs often use 12-15 L/100km. Typical new cars in Europe range from 4-7 L/100km depending on size and powertrain: compact cars often achieve 4-5 L/100km, while SUVs may use 7-9 L/100km.
How to convert L/100km to MPG?
MPG (US) = 235.215 / L/100km. For example, 8 L/100km = 235.215 / 8 = 29.4 MPG. For MPG (UK), use 282.481 / L/100km. The difference is because a US gallon (3.785 L) is smaller than an Imperial gallon (4.546 L).
Related Calculators
- km/L Calculator — calculate kilometers per liter
- MPG Calculator — calculate miles per gallon
- Cost per Mile Calculator — how much does driving cost per mile?
- Annual Gas Cost Calculator — estimate yearly fuel spending
- Fuel Consumption Calculator — compare vehicles side by side
- Speed Converter — L/100km depends on cruising speed
- All Fuel Calculators
Fuel consumption calculated using L/100km = (liters ÷ km) × 100. MPG conversion: MPG (US) = 235.215 ÷ L/100km. MPG (UK) = 282.481 ÷ L/100km. Annual cost assumes 20,000 km/year.