How to convert MPG (UK) to liters per 100km
MPG (UK) and Liters per 100 km are related by a formula rather than a single factor. Fuel economy conversions let you compare cars rated in different countries. Note that L/100 km is an inverse measure — lower is better.
MPG (UK) to Liters per 100 km conversion table
| MPG (UK) (mpg (UK)) | Liters per 100 km (L/100 km) |
|---|---|
| 3 mpg (UK) | 94.1603121106 L/100 km |
| 5 mpg (UK) | 56.4961872664 L/100 km |
| 8 mpg (UK) | 35.3101170415 L/100 km |
| 10 mpg (UK) | 28.2480936332 L/100 km |
| 15 mpg (UK) | 18.8320624221 L/100 km |
| 20 mpg (UK) | 14.1240468166 L/100 km |
| 25 mpg (UK) | 11.2992374533 L/100 km |
| 30 mpg (UK) | 9.41603121106 L/100 km |
| 40 mpg (UK) | 7.0620234083 L/100 km |
| 50 mpg (UK) | 5.64961872664 L/100 km |
About the units
MPG (UK) (mpg (UK))
Imperial miles per gallon uses the larger 4.546 L UK gallon, so UK mpg figures are higher.
Liters per 100 km (L/100 km)
Liters per 100 kilometers is fuel used to travel 100 km; lower numbers mean better economy.
How to use this converter
- Type the number of MPG (UK) (mpg (UK)) in the input box.
- The result in liters per 100km appears instantly — no button needed.
- See the same value in every other fuel economy unit just below.
- Use “Swap units” to convert liters per 100km back to MPG (UK).
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many liters per 100km are in one mpg (uk)?
282.480936332 L/100 km corresponds to 1 mpg (UK). Because this scale uses an offset or an inverse relationship, there is no single multiplication factor — use the formula above.
How do I convert MPG (UK) to liters per 100km?
Apply the formula shown on this page, or enter your value in the converter for an instant exact answer.
What is 25 mpg (UK) in L/100 km?
25 mpg (UK) = 11.2992374533 L/100 km. Also, 10 mpg (UK) = 28.2480936332 L/100 km and 40 mpg (UK) = 7.0620234083 L/100 km.
What is the difference between a mpg (uk) and a liters per 100 km?
Imperial miles per gallon uses the larger 4.546 L UK gallon, so UK mpg figures are higher. Liters per 100 kilometers is fuel used to travel 100 km; lower numbers mean better economy.
Is this tool free and private?
Yes — the MPG (UK) to Liters per 100 km is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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