PetrolCalculator

Fuel calculator

MPG to L/100km Converter

Convert UK MPG and litres per 100km.

Use this calculator

Convert to Litres per 100km
Enter a value to convert UK MPG to L/100km.

Method: 4.54609 × 100 ÷ 1.609344 ÷ UK MPG.

What your result means

This converter expresses UK MPG as litres used per 100 kilometres. The relationship is inverse: higher MPG produces a lower L/100km figure.

Worked example

Using 40 UK MPG:

Converted consumption
7.06 L/100km

Use Reverse direction in the converter to turn L/100km back into UK MPG.

Formula

L/100km=4.54609×1001.609344×UK MPG\text{L/100km}=\frac{4.54609\times100}{1.609344\times\text{UK MPG}}
UK MPG=4.54609×1001.609344×L/100km\text{UK MPG}=\frac{4.54609\times100}{1.609344\times\text{L/100km}}

UK MPG to L/100km reference

UK MPGL/100km
309.42 L/100km
407.06 L/100km
505.65 L/100km
604.71 L/100km

Helpful questions

Does this use UK or US MPG?

It uses UK / imperial MPG. Convert US MPG to UK MPG first if your figure uses a US gallon.

Why does higher MPG give lower L/100km?

MPG measures distance per gallon, while L/100km measures fuel used for a fixed distance. They describe the same consumption from opposite directions.

Can I convert back to MPG?

Yes. Choose Reverse direction in the calculator to convert L/100km to UK MPG using the same exact constants.

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