MPG (US) vs Kilometers per Liter
Compare mpg (us) and kilometers per liter side by side, convert in both directions, and see the exact factor - Fuel Consumption units.
= 0.425144 km/L
= 2.3521 mpg
1 mile per gallon (US) = 0.425144 km/L · 1 kilometer per liter = 2.3521 mpg
The MPG (US) is the smaller unit - the same amount has a smaller number when measured in it.
| MPG (US) (mpg) | Kilometers per Liter (km/L) | Kilometers per Liter (km/L) | MPG (US) (mpg) |
|---|---|---|---|
| 1 | 0.425144 | 1 | 2.3521 |
| 2 | 0.850287 | 2 | 4.7043 |
| 5 | 2.1257 | 5 | 11.7607 |
| 10 | 4.2514 | 10 | 23.5215 |
| 25 | 10.6286 | 25 | 58.8036 |
| 50 | 21.2572 | 50 | 117.6 |
| 100 | 42.5144 | 100 | 235.2 |
| 250 | 106.3 | 250 | 588 |
| 500 | 212.6 | 500 | 1,176 |
| 1000 | 425.1 | 1000 | 2,352 |
Quick Answer
1 mile per gallon (US) (mpg) = 0.425144 kilometers per liter (km/L), and 1 kilometer per liter = 2.3521 mpg (us). Kilometers per Liter is the larger unit, so the same physical amount needs a bigger number when measured in mpg (us). Convert either way with the live tool below or the dedicated converter pages.
Key Facts
- 1 mile per gallon (US) (mpg) = 0.425144 km/L
- 1 kilometer per liter (km/L) = 2.3521 mpg
- Conversion is exact multiplication - no rounding in the factor
- Table below covers common values in both directions
- Dedicated converters: mpg→km/L and km/L→mpg pages with live tools
Frequently Asked Questions
Which is bigger, a mile per gallon (US) or a kilometer per liter?
One mile per gallon (US) equals 0.425144 km/L, and one kilometer per liter equals 2.3521 mpg. The unit with the larger factor is the physically bigger one.
How do I convert mpg (us) to kilometers per liter?
Multiply by the factor: value in km/L = value in mpg × 0.425144. Example: 5 mpg = 2.1257 km/L. Reverse: divide by 0.425144 (or multiply by 2.3521).
Why are mpg (us) and kilometers per liter different?
They come from different measurement systems - MPG (US) belongs to the metric (SI) world, Kilometers per Liter to the US customary world (or another convention). The conversion is exact: 0.425144 km/L per mile per gallon (US), no rounding needed for the factor itself.
Is there a quick way to convert without a calculator?
Memorize the 1-to factor: 1 mile per gallon (US) ≈ 0.425144 km/L. Then multiply. For 2 mpg that's ≈ 0.850287 km/L.
Frequently Asked Questions
One mile per gallon (US) equals 0.425144 km/L, and one kilometer per liter equals 2.3521 mpg. The unit with the larger factor is the physically bigger one.
Multiply by the factor: value in km/L = value in mpg × 0.425144. Example: 5 mpg = 2.1257 km/L. Reverse: divide by 0.425144 (or multiply by 2.3521).
They come from different measurement systems - MPG (US) belongs to the metric (SI) world, Kilometers per Liter to the US customary world (or another convention). The conversion is exact: 0.425144 km/L per mile per gallon (US), no rounding needed for the factor itself.
Memorize the 1-to factor: 1 mile per gallon (US) ≈ 0.425144 km/L. Then multiply. For 2 mpg that's ≈ 0.850287 km/L.