How do I convert L/100 km to MPG?

Divide 235.215 by the L/100 km figure for US MPG, or 282.481 for UK MPG.

Is a lower L/100 km better?

Yes. L/100 km is fuel used per distance, so lower means more economical — the opposite of MPG.

Which MPG should I use?

Use US MPG when comparing with US sources and UK MPG for UK sources. The calculator shows both so the gallon type is always clear.

L/100 km to MPG Converter

Convert fuel consumption in litres per 100 km to miles per gallon. Both US and UK (imperial) MPG are shown and clearly labelled, so you never compare figures that use different gallons.

Fuel consumption (L/100 km)

29.4

MPG (US)

35.31

MPG (UK)

12.5

km per litre

Formula: L/100 km = 235.215 ÷ MPG (US), or 282.481 ÷ MPG (UK). The constants come from 1 mile = 1.609344 km, 1 US gallon = 3.785411784 L and 1 UK gallon = 4.54609 L. Lower L/100 km and higher MPG both mean better economy. To work out MPG from a fill-up, use the MPG Calculator.

L/100 km to MPG chart

L/100 km	MPG (US)	MPG (UK)
3	78.4	94.16
4	58.8	70.62
5	47.04	56.5
6	39.2	47.08
7	33.6	40.35
8	29.4	35.31
10	23.52	28.25
12	19.6	23.54
15	15.68	18.83

Need the other direction? Convert MPG to L/100 km.

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How to use l/100 km to mpg converter

1Enter the fuel consumption in L/100 km.
2Choose which MPG to highlight: US gallons or UK (imperial) gallons.
3Read both MPG figures plus km per litre.
4Use the chart for common L/100 km values.

About this tool

L/100 km tells you how many litres a car uses to drive 100 km, so a lower number is better. MPG is the inverse — distance per gallon — so to convert you divide: US MPG = 235.215 ÷ L/100 km, and UK MPG = 282.481 ÷ L/100 km.

The two MPG figures differ because the gallons do: a US gallon is 3.785411784 litres and a UK (imperial) gallon is 4.54609 litres. 8 L/100 km is 29.4 US MPG but 35.3 UK MPG — the same car, described two ways.

Use this page to compare a European or Australian fuel-economy figure with a US or UK one. To work out consumption from a fill-up, use the MPG Calculator, which reports L/100 km as well.

Frequently asked questions

8 L/100 km is 29.4 MPG in US gallons, or 35.3 MPG in UK (imperial) gallons.

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