Convert mpg (imp) to L/100km instantly — with a table, typical fuel-economy values, and a live calculator.
1 mpg (imp) equals 282.48 L/100km.
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) | L/100km |
|---|---|
| 10 mpg (imp) | 28.25 L/100km |
| 15 mpg (imp) | 18.83 L/100km |
| 20 mpg (imp) | 14.12 L/100km |
| 25 mpg (imp) | 11.3 L/100km |
| 30 mpg (imp) | 9.42 L/100km |
| 35 mpg (imp) | 8.07 L/100km |
| 40 mpg (imp) | 7.06 L/100km |
| 45 mpg (imp) | 6.28 L/100km |
| 50 mpg (imp) | 5.65 L/100km |
| 60 mpg (imp) | 4.71 L/100km |
| 70 mpg (imp) | 4.04 L/100km |
| 80 mpg (imp) | 3.53 L/100km |
| 100 mpg (imp) | 2.82 L/100km |
| L/100km | mpg (imp) |
|---|---|
| 2 L/100km | 141.24 mpg (imp) |
| 3 L/100km | 94.16 mpg (imp) |
| 4 L/100km | 70.62 mpg (imp) |
| 5 L/100km | 56.5 mpg (imp) |
| 6 L/100km | 47.08 mpg (imp) |
| 7 L/100km | 40.35 mpg (imp) |
| 8 L/100km | 35.31 mpg (imp) |
| 9 L/100km | 31.39 mpg (imp) |
| 10 L/100km | 28.25 mpg (imp) |
| 12 L/100km | 23.54 mpg (imp) |
| 15 L/100km | 18.83 mpg (imp) |
| 18 L/100km | 15.69 mpg (imp) |
| 20 L/100km | 14.12 mpg (imp) |
| Vehicle type | mpg (imp) | L/100km |
|---|---|---|
| Efficient hybrid | 70.62 mpg (imp) | 4 L/100km |
| Small economy car | 56.5 mpg (imp) | 5 L/100km |
| Compact car | 43.46 mpg (imp) | 6.5 L/100km |
| Mid-size sedan | 35.31 mpg (imp) | 8 L/100km |
| Large SUV | 25.68 mpg (imp) | 11 L/100km |
| Thirsty pickup | 20.18 mpg (imp) | 14 L/100km |
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 282.48 L/100km.
30 mpg (imp) equals 9.42 L/100km.
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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