Global Fuel CalculatorMPG to km/L Converter
If you grew up thinking in kilometres per litre and you're now looking at a car quoted in miles per gallon, the numbers can feel like they come from different planets. This converter translates MPG into km/L straight away, treating US and UK gallons separately so the answer matches the market the figure came from.
As a rule of thumb, US MPG divided by 2.35 gives km/L, and UK MPG divided by 2.82 does the same. The tool does the exact arithmetic, so 35 US MPG comes out at 14.88 km/L rather than a rounded 15. You will also see this written as mpg to kmpl or mpg to kml; all three mean kilometres per litre. Choose the gallon in the "From" box before reading the result.
MPG to km/L Converter
The conversion formula
km/L = MPG (US) × 0.42514, or MPG (imperial) × 0.35401
Worked example: 35 MPG (US) = 14.88 km/L
Need it the other way round? Use the km/L to MPG Converter.
MPG to km/L conversion table
| MPG (US) | L/100km | km/L | MPG (imp) |
|---|---|---|---|
| 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 km/L 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 km/L. Press Swap to reverse them.
- Read the result. The answer appears straight away, worked out as km/L = MPG (US) × 0.42514, or MPG (imperial) × 0.35401.
- Check common values. Compare against the conversion table below if you want to sanity-check a figure.
Common questions
How many km/L is 30 MPG?
With US gallons, 30 MPG is about 12.75 km/L. With imperial (UK) gallons, 30 MPG is about 10.62 km/L. The gallon you start from makes a difference of roughly a fifth.
What is the formula for MPG to km/L?
km/L = MPG × 1.609344 ÷ the gallon size in litres. For US gallons that works out as MPG × 0.4251, and for imperial gallons MPG × 0.3540.
Is a higher km/L better, like with MPG?
Yes. Both are "distance per unit of fuel", so bigger means more efficient. That's the opposite of L/100km, where a smaller number is better.
Why do people in Pakistan and India call it "average" or "mileage"?
It's local convention. Fuel is sold by the litre and odometers count kilometres, so kilometres per litre is the figure that actually means something at the pump.
Which gallon should I pick for an American car?
The US gallon. UK sources use the imperial gallon. If a source doesn't say which, assume the country it comes from and double-check against L/100km if you can.