MPG (UK) to km/L Converter

ConversionEdited by Hemant Kumar and Anjita Rai, founders · How we checkUpdated Free · No sign-up

Quick answer: To convert MPG to km/L, multiply by 0.3540062. For example, 25 mpg (UK) is 8.850155 km/L. One mile per imperial gallon equals 0.3540062 km/L.

Use the MPG (UK) to km/L Converter

MPG (UK) to km/L formula and what each symbol means

km/L = mpg (UK) × 0.3540062

Symbols used in the formula
SymbolMeaning
mpg (UK)Mile per imperial gallon
km/LKilometer per liter

MPG (UK) to km/L examples

8 mpg (UK)

8 mpg (UK) × 0.3540062 = 2.83205 km/L.

25 mpg (UK)

25 mpg (UK) × 0.3540062 = 8.850155 km/L.

40 mpg (UK)

40 mpg (UK) × 0.3540062 = 14.16025 km/L.

MPG (UK) compared with km/L

One km/L is 2.825 times as large as one mpg (UK), so your number gets smaller when you convert MPG to km/L and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.

About MPG and km/L

Mile per imperial gallon (mpg (UK)): Miles per imperial gallon. Kilometer per liter (km/L): Kilometres travelled per litre of fuel.

Where MPG to km/L conversions are used

Cars are rated in litres per 100 km in Europe and India, mpg in the US and UK, and km/L in several Asian markets. Comparing a used import with a local car needs a fuel-economy conversion.

How to calculate MPG (UK) to km/L step by step

  1. Enter the value in mpg (UK) (the starting unit).
  2. Multiply by 0.3540062, because 1 mpg (UK) = 0.3540062 km/L.
  3. The product is the value in km/L. To go back, divide by 0.3540062 or multiply by 2.824809.

Popular fuel consumption conversions

How to read your MPG (UK) to km/L result

Quick estimate: multiply by about 0.35 to get km/L from MPG; this is within 1.2% of the exact factor. Fuel economy can be written as distance per volume (km/L, mpg) or volume per distance (L/100 km).

MPG (UK)KM/L
51.770031
62.124037
82.83205
103.540062
155.310093
207.080124
3010.62019
4014.16025

km/L to MPG (UK): quick table

KM/LMPG (UK)
719.77367
1233.89771
1850.84657
2262.14581
3084.74428
3598.86833

Common mistakes when calculating MPG (UK) to km/L

  • Using mpg (US) and mpg (UK) as the same: 1 UK mpg is about 1.2 US mpg.
  • Dividing when you should multiply: from mpg (UK) to km/L multiply by 0.3540062; from km/L to mpg (UK) divide by 0.3540062.

MPG (UK) to km/L FAQ

How many km/L are in 1 mpg (UK)?

1 mpg (UK) equals 0.3540062 km/L.

How many mpg (UK) are in 1 km/L?

1 km/L equals 2.824809 mpg (UK).

Is 1 mpg (UK) = 0.3540062 km/L an exact conversion?

The factor is shown rounded to 7 significant figures (0.3540062). The calculator above uses more digits.

What is a kilometer per liter (km/L)?

Kilometres travelled per litre of fuel.

How can I estimate MPG to km/L in my head?

Quick estimate: multiply by about 0.35 to get km/L from MPG; this is within 1.2% of the exact factor.

What is 12 mpg (UK) in km/L?

12 mpg (UK) = 4.248074 km/L (since 12 × 0.3540062).

What is 7 mpg (UK) in km/L?

7 mpg (UK) = 2.478043 km/L (since 7 × 0.3540062).

What is 35 mpg (UK) in km/L?

35 mpg (UK) = 12.39022 km/L (since 35 × 0.3540062).

How many decimals should I keep when converting mpg (UK) to km/L?

Match the precision of your original measurement. For example, 8.850155 km/L rounds to 8.85 km/L at 3 significant figures; keep more digits only for engineering or scientific work.

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Method, review and disclaimer

Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors