Global Fuel CalculatorMPG to L/100km Converter
Convert any MPG figure into L/100km (also written litres per 100 km, or just L/100), with separate results for US and imperial gallons because the two produce meaningfully different answers — roughly a twenty percent gap for the same real consumption. Enter your value once and see it converted precisely rather than rounded to a rough rule of thumb.
The two scales run in opposite directions: MPG rewards a higher number, L/100km rewards a lower one. A specification sheet quoting one and a review quoting the other cannot be compared by eye, which is exactly the gap this converter closes. To convert MPG to liters per 100 km, enter the figure above and read the L/100km result.
MPG to L/100km Converter
The conversion formula
L/100km = 235.215 ÷ MPG (US), or 282.481 ÷ MPG (imperial)
Worked example: 30 MPG (US) = 7.84 L/100km
Need it the other way round? Use the L/100km to MPG Converter.
MPG to L/100km conversion table
| MPG (US) | L/100km | km/L | MPG (imp) |
|---|---|---|---|
| 10 | 23.52 | 4.25 | 12.01 |
| 15 | 15.68 | 6.38 | 18.01 |
| 20 | 11.76 | 8.50 | 24.02 |
| 25 | 9.41 | 10.63 | 30.02 |
| 30 | 7.84 | 12.75 | 36.03 |
| 35 | 6.72 | 14.88 | 42.03 |
| 40 | 5.88 | 17.01 | 48.04 |
| 45 | 5.23 | 19.13 | 54.04 |
| 50 | 4.70 | 21.26 | 60.05 |
How to use the MPG to L/100km Converter
- Enter your value. Type the figure you want to convert, in MPG (US).
- Check the units. Make sure "From" shows MPG (US) and "To" shows L/100km. Press Swap to reverse them.
- Read the result. The answer appears straight away, worked out as L/100km = 235.215 ÷ MPG (US), or 282.481 ÷ MPG (imperial).
- Check common values. Compare against the conversion table below if you want to sanity-check a figure.
Common questions
How do I convert MPG to L/100 by hand?
For a US gallon figure, divide 235.214 by the MPG value. For an imperial gallon figure, divide 282.481 by it. Thirty US MPG works out to about 7.84 L/100km; thirty imperial MPG works out to about 9.42 L/100km — noticeably different despite the same starting number.
How much is 40 MPG in km/l?
Convert MPG to L/100km first using the formula above, then take 100 divided by that L/100km figure to reach km/L. Forty US MPG is about 5.88 L/100km, which is roughly 17 km/L.
What is 25 MPG in L/100km?
25 US MPG is 9.41 L/100km (235.215 ÷ 25). If it is 25 imperial MPG, the answer is 11.30 L/100km (282.481 ÷ 25). The two differ by about a fifth, so check which gallon the figure uses.
What is 35 MPG in L/100?
35 US MPG is 6.72 L/100km, and 35 imperial MPG is 8.07 L/100km. A table of other common values is further down this page.
Is a UK MPG the same as a US MPG in this converter?
No, and the converter treats them separately for exactly that reason. Select imperial when your MPG figure comes from a UK source and US when it comes from an American one — mixing the two silently produces a result that is about twenty percent off.