Convert mpg (imp) to km/L instantly — with a table, typical fuel-economy values, and a live calculator.
1 mpg (imp) equals 0.354 km/L.
Consumption (L/100km) and efficiency (mpg, km/L) are reciprocals of each other: a higher mpg means a lower L/100km. Double the mpg and you halve the L/100km — so the conversion follows a hyperbola, not a straight line. Concretely: L/100km = 235.21 ÷ mpg (US).
| mpg (imp) | km/L |
|---|---|
| 10 mpg (imp) | 3.54 km/L |
| 15 mpg (imp) | 5.31 km/L |
| 20 mpg (imp) | 7.08 km/L |
| 25 mpg (imp) | 8.85 km/L |
| 30 mpg (imp) | 10.62 km/L |
| 35 mpg (imp) | 12.39 km/L |
| 40 mpg (imp) | 14.16 km/L |
| 45 mpg (imp) | 15.93 km/L |
| 50 mpg (imp) | 17.7 km/L |
| 60 mpg (imp) | 21.24 km/L |
| 70 mpg (imp) | 24.78 km/L |
| 80 mpg (imp) | 28.32 km/L |
| 100 mpg (imp) | 35.4 km/L |
| km/L | mpg (imp) |
|---|---|
| 5 km/L | 14.12 mpg (imp) |
| 8 km/L | 22.6 mpg (imp) |
| 10 km/L | 28.25 mpg (imp) |
| 12 km/L | 33.9 mpg (imp) |
| 15 km/L | 42.37 mpg (imp) |
| 18 km/L | 50.85 mpg (imp) |
| 20 km/L | 56.5 mpg (imp) |
| 22 km/L | 62.15 mpg (imp) |
| 25 km/L | 70.62 mpg (imp) |
| 28 km/L | 79.09 mpg (imp) |
| 30 km/L | 84.74 mpg (imp) |
| 35 km/L | 98.87 mpg (imp) |
| 40 km/L | 112.99 mpg (imp) |
| Vehicle type | mpg (imp) | km/L |
|---|---|---|
| Efficient hybrid | 70.62 mpg (imp) | 25 km/L |
| Small economy car | 56.5 mpg (imp) | 20 km/L |
| Compact car | 43.46 mpg (imp) | 15.38 km/L |
| Mid-size sedan | 35.31 mpg (imp) | 12.5 km/L |
| Large SUV | 25.68 mpg (imp) | 9.09 km/L |
| Thirsty pickup | 20.18 mpg (imp) | 7.14 km/L |
L/100km is the standard figure across continental Europe and a consumption measure: lower is better. mpg (miles per gallon) is an efficiency measure: higher is better. Watch out — the US gallon (3.785 L) is smaller than the imperial UK gallon (4.546 L), so the same fuel economy reads about 20% higher in UK mpg. km/L is the efficiency form of L/100km, common across parts of Asia and Latin America.
Because mpg and L/100km are reciprocals, you can never turn one into the other with a fixed multiplier — you always divide by the value. For more pairs, use our fuel economy conversion hub.
1 mpg (imp) equals 0.354 km/L.
30 mpg (imp) equals 10.62 km/L.
Consumption (L/100km) and efficiency (mpg, km/L) are reciprocals of each other: a higher mpg means a lower L/100km. If the mpg doubles, the L/100km halves — so there is no fixed multiplier; you divide by the value instead. That is why the curve is a hyperbola, not a straight line.
The US gallon (3.785 L) is smaller than the imperial (UK) gallon (4.546 L). The same fuel economy therefore reads as a higher number in imperial mpg — roughly 20% higher. 30 mpg (US) is about 36 mpg (imperial). Always check which gallon a figure refers to.
L/100km is the standard figure across continental Europe (lower is better). US mpg is used in the United States and imperial mpg in the United Kingdom — both express miles per gallon (higher is better) but use different-sized gallons. km/L is common across parts of Asia, Latin America, and Africa.
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