Convert Liters per 100 km to MPG (UK) (L/100 km to mpg UK)
Liters per 100 km and miles per imperial gallon are inversely related: mpg (UK) = 282.4809363 ÷ L/100 km, so 6 L/100 km = 47.08015606 mpg (UK).
Also searched as liters per 100 kilometers to mpg UK, liters per 100 kilometers in mpg UK, liters per 100 kilometers into miles per imperial gallon, L/100 km to mpg UK, L/100 km in miles per imperial gallon, L/100 km into mile per imperial gallon, liter per 100 kilometers to mile per imperial gallon, L/100 km to miles per imperial gallon converter and litres per 100 kilometres to miles per imperial gallon.
1 L/100 km = 282.4809363 mpg (UK)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk liter per 100 kilometers to mile per imperial gallon converter to paste a column from Excel.
How to Convert Liter per 100 km to MPG (UK)
- mpg (UK) = 282.4809363 ÷ L/100 km
- L/100 km = 282.4809363 ÷ mpg (UK)
- Example: convert 6 L/100 km to mpg (UK): 282.4809363 ÷ 6 = 47.08015606 mpg (UK)
Formula
mpg (UK) = 282.4809363318 ÷ L/100 km
Derivation from SI units:
- Fuel used in litres per 100 km; km/L = 100 ÷ (L/100 km), so the scales are reciprocal.
- 1 mpg (UK) = 1.609344 km ÷ 4.54609 L = 0.354006189… km/L.
- Solving for mpg (UK): mpg (UK) = 282.4809363318 ÷ L/100 km (a higher L/100 km means a lower mpg (UK))
Both units are defined exactly, so the factor is exact. Liter per 100 km definition: liter per 100 kilometers; MPG (UK) definition: mile per imperial gallon.
Worked examples
- A car using 6 L/100 km gets 47.08015606 mpg (UK).
282.4809363 ÷ 6 = 47.08015606 mpg (UK) - A diesel using 4.5 L/100 km gets 62.77354141 mpg (UK).
282.4809363 ÷ 4.5 = 62.77354141 mpg (UK)
Liter per 100 km to MPG (UK) conversion table
| Liters per 100 km (L/100 km) | MPG (UK) |
|---|---|
| 3 L/100 km | 94.16031211 mpg (UK) |
| 4 L/100 km | 70.62023408 mpg (UK) |
| 5 L/100 km | 56.49618727 mpg (UK) |
| 6 L/100 km | 47.08015606 mpg (UK) |
| 7 L/100 km | 40.35441948 mpg (UK) |
| 8 L/100 km | 35.31011704 mpg (UK) |
| 9 L/100 km | 31.3867707 mpg (UK) |
| 10 L/100 km | 28.24809363 mpg (UK) |
| 12 L/100 km | 23.54007803 mpg (UK) |
| 15 L/100 km | 18.83206242 mpg (UK) |
Where it's used
Fuel consumption in L/100 km is converted to miles per imperial gallon for UK buyers and reviews. Divide 282.481 by the L/100 km value.
Liter per 100 km to other fuel economy units
| Conversion | 1 L/100 km equals |
|---|---|
| liter per 100 kilometers to mile per imperial gallon | 282.4809363 mpg (UK) |
| liter per 100 kilometers to mile per US gallon | 235.2145833 mpg |
| liter per 100 kilometers to kilometer per liter | 100 km/L |
Frequently asked questions
Is UK mpg the same as US mpg?
No. The imperial gallon is 4.54609 L and the US gallon 3.785411784 L, so 1 UK mpg = 0.8326741846 mpg.
What is the formula for liters per 100 kilometers to miles per imperial gallon?
mpg (UK) = 282.4809363 ÷ L/100 km. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 282.4809363 ÷ 6 = 47.08015606 mpg (UK).
Why does a higher L/100 km give a lower mpg (UK)?
Liters per 100 km counts length per unit mass (an indirect system), while miles per imperial gallon counts mass per unit length (a direct system). A finer yarn has a higher indirect number and a lower direct number.
Is the L/100 km to mpg (UK) conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (radian) and Table 8 (non-SI units accepted for use with the SI).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "mile per gallon (U.K.)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Liters per 100 km to MPG (UK) (L/100 km to mpg UK). Retrieved October 25, 2026, from https://scientificconverters.com/fuel-economy/liters-per-100-km-to-miles-per-gallon-uk/
IEEE
Scientific Converters, "Convert Liters per 100 km to MPG (UK) (L/100 km to mpg UK)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/fuel-economy/liters-per-100-km-to-miles-per-gallon-uk/