Convert Liters per 100km to Miles per Gallon (US)
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About Liters per 100km to Miles per Gallon (US) Conversions
Divide 235 by the L/100km Value
The conversion formula is: MPG (US) = 235.215 / L per 100 km. Most people round this to 235. So 7 L/100km is about 235/7 = 33.6 MPG. Going the other direction works the same way: divide 235 by MPG to get L/100km.
This formula is not a rough approximation. The 235.215 constant comes directly from the exact definitions of the US gallon (3.785411784 liters) and the mile (1.609344 km). The relationship is: (3.785411784 x 100) / 1.609344 = 235.215.
European Car Reviews to American MPG
When a European car review says a car gets "5.2 L/100km combined," you need to translate that to understand it as an American. Here is the reference table:
| L/100km | MPG (US) | Vehicle category |
|---|---|---|
| 3 | 78.4 | Efficient plug-in hybrid (EV mode) |
| 4 | 58.8 | Toyota Prius territory |
| 5 | 47.0 | Efficient small car / hybrid |
| 6 | 39.2 | Good sedan, diesel hatchback |
| 7 | 33.6 | Average new car (2024 global avg) |
| 8 | 29.4 | Small SUV / crossover |
| 9 | 26.1 | Midsize SUV |
| 10 | 23.5 | Large SUV / older vehicle |
| 12 | 19.6 | Full-size truck |
| 15 | 15.7 | Heavy-duty truck / performance V8 |
| 20 | 11.8 | Commercial vehicle / old SUV |
Why L/100km Is Actually the Better Metric
L/100km measures fuel consumption directly: how much fuel you burn over a fixed distance. MPG measures distance per unit of fuel. The practical difference: in L/100km, the math is linear. Using 1 fewer liter per 100 km always saves the same amount of fuel, regardless of where you start. In MPG, going from 10 to 15 MPG saves vastly more fuel than going from 30 to 35 MPG, even though both are "5 MPG improvements."
This linearity makes L/100km better for comparing vehicles, calculating fuel costs, and evaluating upgrades. If fuel costs 1.50 euros per liter and you drive 15,000 km/year, a car at 6 L/100km costs 1,350 euros in fuel. A car at 8 L/100km costs 1,800 euros. The difference is 450 euros/year, and you can calculate that directly because the relationship is linear.
Testing Standards Differ Too
European WLTP fuel economy ratings tend to be more realistic than the older NEDC figures but can still differ from US EPA ratings. The EPA cycle includes more aggressive acceleration and higher highway speeds. As a result, a car rated at 5.5 L/100km on WLTP might rate at 6.0 L/100km equivalent on the EPA cycle. When converting L/100km from a European spec sheet to compare with EPA MPG, expect the real-world MPG to be slightly lower than the straight mathematical conversion suggests.
Quick Conversions
| Unit Name | Symbol | Per 1 Liter per 100km |
|---|---|---|
| Kilometer per Liter | km/L | 100 |
| Liter per 100km | L/100km | 1 |
| Mile per Gallon (UK) | mpg (UK) | 282.481 |
| Mile per Gallon (US) | mpg | 235.214 |
Frequently Asked Questions
How do I convert Liters per 100km to Miles per Gallon (US)?
To convert Liters per 100km to Miles per Gallon (US), use the conversion where 1 Liter per 100 km (L/100km) = 235.214 Miles per Gallon (US) (mpg). For example, 1 Liter per 100 km = 235.214 Miles per Gallon (US).
What are common Liter per 100 km to Mile per Gallon (US) conversions?
Here are common conversions: 1 Liters per 100km = 235.214 Miles per Gallon (US), 5 Liters per 100km = 47.0429 Miles per Gallon (US), 10 Liters per 100km = 23.5214 Miles per Gallon (US), 25 Liters per 100km = 9.40858 Miles per Gallon (US), 50 Liters per 100km = 4.70429 Miles per Gallon (US), 100 Liters per 100km = 2.35214 Miles per Gallon (US).
When would I need to convert Liters per 100km to Miles per Gallon (US)?
Fuel economy conversions are needed when comparing vehicle efficiency ratings across countries — the US uses miles per gallon (MPG), Europe uses liters per 100 kilometers (L/100km), and the UK uses imperial MPG, which differs from US MPG.
How precise are the conversions?
All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.