L/100km to MPG (UK) (L/100km to MPG (UK))
Result
282.4809363 MPG (UK)
Formula
MPG (UK) = 282.4809363 ÷ L/100km
This is an inverse relationship: a larger value in L/100km gives a smaller value in MPG (UK).
Fuel economy is converted through the US gallon (3.785411784 L) and imperial gallon (4.54609 L): L/100 km = 235.215 ÷ mpg (US). Power uses mechanical horsepower and metric horsepower (PS = 735.49875 W). Torque uses 1 lb·ft = 1.3558179 N·m.
Worked examples
- 282.4809363 ÷ 1 = 282.48094 MPG (UK)
- 282.4809363 ÷ 10 = 28.248094 MPG (UK)
- 282.4809363 ÷ 100 = 2.8248094 MPG (UK)
Common mistakes
- L/100 km is inverse to mpg — lower is better — so it does not scale linearly: going from 10 to 20 mpg saves far more fuel than going from 40 to 50.
- UK and US mpg differ because the imperial gallon is 20% larger: 40 mpg (UK) is 33.3 mpg (US).
- Car makers in Europe and Japan usually quote PS, not horsepower; 100 PS is 98.6 hp.
L/100km to MPG (UK) table
| L/100km (L/100km) | MPG (UK) (MPG (UK)) |
|---|---|
| 1 | 282.48094 |
| 2 | 141.24047 |
| 5 | 56.496187 |
| 10 | 28.248094 |
| 20 | 14.124047 |
| 50 | 5.6496187 |
| 100 | 2.8248094 |
| 1,000 | 0.28248094 |
The units
- L/100km (L/100km)
- A unit of automotive.
- MPG (UK) (MPG (UK))
- 1 MPG (UK) = 0.8326741846 MPG (US).
Sources for these factors
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy