Miles per US gallon to Kilometres per litre
Type a value in Miles per US gallon and get the result in Kilometres per litre, calculated exactly.
30 Miles per US gallon ≈ 12.75431122 Kilometres per litre
Precision
Exact factorRounded for display to about 10 significant digits.
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Formula
km/L = mpg (US) × 0.42514370743
To convert Miles per US gallon to Kilometres per litre, multiply the value by 0.42514370743.
Worked examples
- 1 mpg (US) × 0.42514370743 ≈ 0.4251437074 km/L
- 30 mpg (US) × 0.42514370743 ≈ 12.75431122 km/L
- 100 mpg (US) × 0.42514370743 ≈ 42.51437074 km/L
This factor is exact by definition.
Conversion table
| Miles per US gallon (mpg (US)) | Kilometres per litre (km/L) |
|---|---|
| 10 | ≈ 4.251437 |
| 15 | ≈ 6.377156 |
| 20 | ≈ 8.502874 |
| 25 | ≈ 10.62859 |
| 30 | ≈ 12.75431 |
| 35 | ≈ 14.88003 |
| 40 | ≈ 17.00575 |
| 45 | ≈ 19.13147 |
| 50 | ≈ 21.25719 |
| 60 | ≈ 25.50862 |
| 70 | ≈ 29.76006 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Kilometres per litre to Miles per US gallon
| Kilometres per litre (km/L) | Miles per US gallon (mpg (US)) |
|---|---|
| 10 | ≈ 23.52146 |
| 15 | 35.2821875 |
| 20 | ≈ 47.04292 |
| 25 | ≈ 58.80365 |
| 30 | 70.564375 |
| 35 | ≈ 82.3251 |
| 40 | ≈ 94.08583 |
| 45 | 105.8465625 |
| 50 | ≈ 117.6073 |
| 60 | 141.12875 |
| 70 | ≈ 164.6502 |
Unit definitions
- Miles per US gallon mpg (US)
- Miles travelled per US gallon: about 0.425144 km/L.
- Kilometres per litre km/L
- Kilometres travelled on one litre of fuel.
Questions people ask
Miles per US gallon to Kilometres per litre: what is the conversion factor?
One mpg (US) is ≈ 0.4251437074 km/L.
How do I convert Miles per US gallon to Kilometres per litre?
Use the formula above. For example, 30 mpg (US) = ≈ 12.75431122 km/L.
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.