MPG Converter
Convert between MPG and L/100km in one step.
Your figure
UK unitsConverted figure
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Fill in the form to see your results.
How this is calculated
- Enter a value in MPG or L/100km.
- We convert using UK (imperial) gallons of 4.546 litres: L/100km = 282.48 ÷ MPG, and MPG = 282.48 ÷ L/100km.
- Results are rounded to one decimal place for easy planning.
Use this converter when you want to move between UK MPG and L/100km. It does not apply fuel prices or assumptions, so you can plug the result into any calculator.
For cost context, try the fuel efficiency calculator or the journey cost calculator. You can also browse the locations hub to compare county and town pages.
Use this when you need to convert dashboard or manufacturer efficiency figures before comparing fuel costs.
Common questions
We use UK MPG (imperial gallons). The conversion matches UK fuel efficiency standards.
Yes. We round to one decimal place so values are easy to read and compare.
No. This tool only converts efficiency units without any pricing assumptions.