Miles per US gallon to Litres per 100 km
Type a value in Miles per US gallon and get the result in Litres per 100 km, calculated exactly.
30 Miles per US gallon ≈ 7.840486111 Litres per 100 km
Exact factorRounded for display to about 10 significant digits.
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Formula
L/100 km = 235.214583333 ÷ mpg (US)
Miles per US gallon and Litres per 100 km are inversely related: divide 235.214583333 by the value in Miles per US gallon to get Litres per 100 km.
Worked examples
- 1 mpg (US) ≈ 235.2145833 L/100 km
- 30 mpg (US) ≈ 7.840486111 L/100 km
- 100 mpg (US) ≈ 2.352145833 L/100 km
This factor is exact by definition.
Conversion table
| Miles per US gallon (mpg (US)) | Litres per 100 km (L/100 km) |
|---|---|
| 10 | ≈ 23.52146 |
| 15 | ≈ 15.68097 |
| 20 | ≈ 11.76073 |
| 25 | ≈ 9.408583 |
| 30 | ≈ 7.840486 |
| 35 | ≈ 6.720417 |
| 40 | ≈ 5.880365 |
| 45 | ≈ 5.226991 |
| 50 | ≈ 4.704292 |
| 60 | ≈ 3.920243 |
| 70 | ≈ 3.360208 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Litres per 100 km to Miles per US gallon
| Litres per 100 km (L/100 km) | Miles per US gallon (mpg (US)) |
|---|---|
| 10 | ≈ 23.52146 |
| 15 | ≈ 15.68097 |
| 20 | ≈ 11.76073 |
| 25 | ≈ 9.408583 |
| 30 | ≈ 7.840486 |
| 35 | ≈ 6.720417 |
| 40 | ≈ 5.880365 |
| 45 | ≈ 5.226991 |
| 50 | ≈ 4.704292 |
| 60 | ≈ 3.920243 |
| 70 | ≈ 3.360208 |
Unit definitions
- Miles per US gallon mpg (US)
- Miles travelled per US gallon: about 0.425144 km/L.
- Litres per 100 km L/100 km
- Litres of fuel used to travel 100 kilometres; lower is more economical.
Questions people ask
Miles per US gallon to Litres per 100 km: what is the conversion factor?
One mpg (US) is ≈ 235.2145833 L/100 km.
How do I convert Miles per US gallon to Litres per 100 km?
Use the formula above. For example, 30 mpg (US) = ≈ 7.840486111 L/100 km.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.