US gallons per 100 miles to kilometers per liter
Type a value in US gallons per 100 miles to see it in kilometers per liter straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the US gallons per 100 miles box.
- Read the result in kilometers per liter as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
km/L = 42.51437074 ÷ gal (US)/100 mi
Divide 42.51437074 by the value in US gallons per 100 miles, because the two units are reciprocal.
Example
To convert 25 gal (US)/100 mi to kilometers per liter: 42.51437074 ÷ 25 = 1.70057 km/L.
Conversion table
| US gallons per 100 miles (gal (US)/100 mi) | Kilometers per liter (km/L) |
|---|---|
| 1 | 42.5144 |
| 2 | 21.2572 |
| 3 | 14.1715 |
| 5 | 8.50287 |
| 10 | 4.25144 |
| 20 | 2.12572 |
| 25 | 1.70057 |
| 50 | 0.850287 |
| 100 | 0.425144 |
| 250 | 0.170057 |
| 500 | 0.0850287 |
| 1,000 | 0.0425144 |
About the units
- US gallon per 100 miles
- US gallons used to travel 100 miles, shown on US fuel economy labels. It equals 100 divided by US mpg.
- Kilometer per liter
- The number of kilometers a vehicle travels on one liter of fuel. A higher number means better economy.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilometers per liter are in one US gallon per 100 miles?
1 gal (US)/100 mi = 42.5144 km/L exactly.
How do I convert US gallons per 100 miles to kilometers per liter?
Use km/L = 42.51437074 ÷ gal (US)/100 mi. For example, 25 gal (US)/100 mi = 1.70057 km/L.
How many US gallons per 100 miles are in one kilometer per liter?
1 km/L = 42.5144 gal (US)/100 mi.
Why is mpg to L/100 km not a simple multiplication?
The units are reciprocal: one is distance per fuel, the other fuel per distance. You divide about 235.215 by the US mpg value, so 30 mpg is about 7.84 L/100 km.
Why do US and UK mpg differ?
The imperial gallon is 4.54609 L and the US gallon is 3.785411784 L, so the same car shows about 20% more miles per gallon in UK figures.