US gal/100mi to L/100km Converter
Enter a value below to convert US gallons per 100 miles to liters per 100 km - you multiply, since L/100km = gal (US)/100mi × 2.35214583, so 8 gal (US)/100mi is 18.82 L/100km. For the opposite direction, use our L/100km to gal (US)/100mi converter.
8 gal (US)/100mi = 18.82 L/100km. Convert US gallons per 100 miles to liters per 100 km. Need the reverse? See L/100km to gal (US)/100mi.
US gallons per 100 miles
- Definition
- US gallons per 100 miles (symbol: gal (US)/100mi) is a measure of fuel consumption: the number of US gallons of fuel a vehicle burns to travel 100 miles. One US gallon is 3.785 liters - smaller than the UK (Imperial) gallon of 4.546 liters - and because the distance is fixed, a lower number means a more efficient car.
- History / origin
- It pairs the US customary gallon with the statute mile, expressing economy as fuel-per-distance rather than the distance-per-fuel of MPG. The fixed-distance form makes fuel costs easy to scale, which is why it appears alongside MPG on US fuel-economy labels.
- Current use
- Gallons per 100 miles is shown on the United States EPA fuel-economy window sticker beside the MPG figure, helping buyers compare how much fuel different cars actually use over the same trip.
Liters per 100 kilometers
- Definition
- Liters per 100 km (symbol: L/100km) is a measure of fuel consumption: the volume of fuel, in liters, a vehicle burns to travel 100 kilometers. Like gal (US)/100mi it is a fuel-per-distance figure, so a lower number means a more efficient car.
- History / origin
- It is the metric standard for fuel economy, defined from the liter and the kilometer. As Europe and most of the world adopted SI units, L/100km replaced gallon-based figures on car specifications and dashboards.
- Current use
- L/100km is the official fuel-economy unit across Europe, Australia, New Zealand, South Africa and much of Asia, quoted on manufacturer brochures, window stickers and trip computers.
US gallons per 100 miles to L/100km conversion table
| US gallons per 100 miles [gal (US)/100mi] | Liters per 100 km [L/100km] |
|---|---|
| 2 gal (US)/100mi | 4.7042916667 L/100km |
| 3 gal (US)/100mi | 7.0564375 L/100km |
| 4 gal (US)/100mi | 9.4085833333 L/100km |
| 5 gal (US)/100mi | 11.7607291667 L/100km |
| 6 gal (US)/100mi | 14.112875 L/100km |
| 7 gal (US)/100mi | 16.4650208333 L/100km |
| 8 gal (US)/100mi | 18.8171666667 L/100km |
| 9 gal (US)/100mi | 21.1693125 L/100km |
| 10 gal (US)/100mi | 23.5214583333 L/100km |
| 12 gal (US)/100mi | 28.22575 L/100km |
Popular US gallons per 100 miles to L/100km conversions
Everyday fuel-economy figures, rounded to two decimals - the kind of numbers you meet on real car specifications.
| US gallons per 100 miles [gal (US)/100mi] | Liters per 100 km [L/100km] |
|---|---|
| 3 gal (US)/100mi | 7.06 L/100km |
| 4 gal (US)/100mi | 9.41 L/100km |
| 5 gal (US)/100mi | 11.76 L/100km |
| 6 gal (US)/100mi | 14.11 L/100km |
| 7 gal (US)/100mi | 16.47 L/100km |
| 8 gal (US)/100mi | 18.82 L/100km |
| 9 gal (US)/100mi | 21.17 L/100km |
| 10 gal (US)/100mi | 23.52 L/100km |
| 11 gal (US)/100mi | 25.87 L/100km |
| 12 gal (US)/100mi | 28.23 L/100km |
How to convert US gallons per 100 miles to L/100km
To convert gal (US)/100mi to L/100km, multiply the gal (US)/100mi value by 2.35214583. Both units are fuel-per-distance measures of the same thing, so the conversion is a single multiplication, not a reciprocal. For example, 8 gal (US)/100mi = 8 × 2.35214583 = 18.82 L/100km.
The constant 2.35214583 comes from the US gallon (3.785411784 liters) and the mile (1.609344 km). The same constant works in both directions:
L/100km = gal (US)/100mi × 2.35214583
gal (US)/100mi = L/100km × 0.42514371
Example. A car rated at 5 gal (US)/100mi does 5 × 2.35214583 = 11.76 L/100km, while a thirstier 12 gal (US)/100mi does 12 × 2.35214583 = 28.23 L/100km.
When you need to convert US gallons per 100 miles to L/100km
Drivers and buyers move between US gallons per 100 miles and liters per 100 km whenever US and metric figures meet. Common cases:
- Reading a US EPA gallons-per-100-miles rating as a familiar European L/100km number.
- Comparing a US-market spec sheet against an imported model's L/100km rating.
- Working out the L/100km of a US rental car whose label quotes gallons per 100 miles.
- Translating a US manufacturer's fuel-use claim into L/100km to compare two cars fairly.
- Budgeting fuel for a road trip abroad when the brochure quotes liters per 100 km.
Frequently asked questions
How do I convert US gallons per 100 miles to liters per 100 km?
Multiply the gal (US)/100mi value by 2.35214583. For example, 8 gal (US)/100mi equals 8 × 2.35214583 = 18.82 L/100km. Both units measure fuel used over a fixed distance, so they move in the same direction.
What is 8 gal (US)/100mi in L/100km?
8 gal (US)/100mi is about 18.82 L/100km, found by multiplying 8 by 2.35214583. A leaner 5 gal (US)/100mi works out to 11.76 L/100km.
What is the gal (US)/100mi to L/100km formula?
The formula is L/100km = gal (US)/100mi × 2.35214583. Because both are fuel-per-distance measures of the same thing, the conversion is a single multiplication, and dividing by the same constant converts back the other way.
Is this the US or UK gallon?
This page uses the US gallon of 3.785 liters, not the larger UK (Imperial) gallon of 4.546 liters. With UK gallons, 8 gal (UK)/100mi would instead be 22.60 L/100km, so the gallon you start from matters.
What is a good gal (US)/100mi figure in L/100km?
Around 4 to 5 gal (US)/100mi, or about 9.41 to 11.76 L/100km, is efficient for a modern petrol car. 8 gal (US)/100mi is roughly 18.82 L/100km, while over 12 gal (US)/100mi, above 28 L/100km, is thirsty.
How do I convert L/100km back to gal (US)/100mi?
Multiply the L/100km value by 0.42514371, or use our full fuel consumption converter. For example, 10 L/100km is 10 × 0.42514371 = 4.25 gal (US)/100mi.
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