Fuel Economy converter
Liters per 100km to Miles per Gallon (UK)
If you need to know how many Miles per Gallon (UK) one Liters per 100km contains, the answer is 282.481088. The conversion is linear, so 10 L/100km is 28.248109 mpg (UK) and 100 L/100km is 2.824811 mpg (UK). Use the converter for any other value.
Formula 1 L/100km = 282.481088 mpg (UK)
Need the other direction? Miles per Gallon (UK) to Liters per 100km.
How to convert Liters per 100km to Miles per Gallon (UK)
Litres per 100 km is an inverse measure: lower is better, and it is not linear. UK miles per gallon equals about 0.354 km/L because the imperial gallon is 4.546 litres.
To convert Liters per 100km to Miles per Gallon (UK), multiply the value in L/100km by 282.481088. For example, 10 L/100km × 282.481088 = 28.248109 mpg (UK). This works because the ratio between the two units is constant for every value in fuel economy.
Worked examples
| L/100km | mpg (UK) |
|---|---|
| 1 L/100km | 282.481088 mpg (UK) |
| 2.5 L/100km | 112.992435 mpg (UK) |
| 5 L/100km | 56.496218 mpg (UK) |
| 10 L/100km | 28.248109 mpg (UK) |
| 25 L/100km | 11.299244 mpg (UK) |
| 50 L/100km | 5.649622 mpg (UK) |
| 100 L/100km | 2.824811 mpg (UK) |
Reverse conversion
| mpg (UK) | L/100km |
|---|---|
| 1 mpg (UK) | 282.481088 L/100km |
| 5 mpg (UK) | 56.496218 L/100km |
| 10 mpg (UK) | 28.248109 L/100km |
| 25 mpg (UK) | 11.299244 L/100km |
| 50 mpg (UK) | 5.649622 L/100km |
| 100 mpg (UK) | 2.824811 L/100km |
When this conversion is useful
This is the calculation you need when you are comparing a car's consumption with a different unit system. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 L/100km is 0.28248109 mpg (UK).
Is the conversion exact?
No: fuel economy has inverse units. Litres per 100 km and gallons per mile fall as efficiency rises, so the conversion divides rather than multiplies.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
L/100km to mpg (UK) conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Liters per 100km (L/100km) | Miles per Gallon (UK) (mpg (UK)) |
|---|---|
| 1 L/100km | 282.481088 mpg (UK) |
| 2 L/100km | 141.240544 mpg (UK) |
| 3 L/100km | 94.160363 mpg (UK) |
| 4 L/100km | 70.620272 mpg (UK) |
| 5 L/100km | 56.496218 mpg (UK) |
| 6 L/100km | 47.080181 mpg (UK) |
| 7 L/100km | 40.354441 mpg (UK) |
| 8 L/100km | 35.310136 mpg (UK) |
| 9 L/100km | 31.386788 mpg (UK) |
| 10 L/100km | 28.248109 mpg (UK) |
| 11 L/100km | 25.680099 mpg (UK) |
| 12 L/100km | 23.540091 mpg (UK) |
| 13 L/100km | 21.729314 mpg (UK) |
| 14 L/100km | 20.177221 mpg (UK) |
| 15 L/100km | 18.832073 mpg (UK) |
| 16 L/100km | 17.655068 mpg (UK) |
| 17 L/100km | 16.616535 mpg (UK) |
| 18 L/100km | 15.693394 mpg (UK) |
| 19 L/100km | 14.867426 mpg (UK) |
| 20 L/100km | 14.124054 mpg (UK) |
| 21 L/100km | 13.45148 mpg (UK) |
| 22 L/100km | 12.840049 mpg (UK) |
| 23 L/100km | 12.281786 mpg (UK) |
| 24 L/100km | 11.770045 mpg (UK) |
| 25 L/100km | 11.299244 mpg (UK) |
| 26 L/100km | 10.864657 mpg (UK) |
| 27 L/100km | 10.462263 mpg (UK) |
| 28 L/100km | 10.08861 mpg (UK) |
| 29 L/100km | 9.740727 mpg (UK) |
| 30 L/100km | 9.416036 mpg (UK) |
| 31 L/100km | 9.112293 mpg (UK) |
| 32 L/100km | 8.827534 mpg (UK) |
| 33 L/100km | 8.560033 mpg (UK) |
| 34 L/100km | 8.308267 mpg (UK) |
| 35 L/100km | 8.070888 mpg (UK) |
| 36 L/100km | 7.846697 mpg (UK) |
| 37 L/100km | 7.634624 mpg (UK) |
| 38 L/100km | 7.433713 mpg (UK) |
| 39 L/100km | 7.243105 mpg (UK) |
| 40 L/100km | 7.062027 mpg (UK) |
| 41 L/100km | 6.889783 mpg (UK) |
| 42 L/100km | 6.72574 mpg (UK) |
| 43 L/100km | 6.569328 mpg (UK) |
| 44 L/100km | 6.420025 mpg (UK) |
| 45 L/100km | 6.277358 mpg (UK) |
| 46 L/100km | 6.140893 mpg (UK) |
| 47 L/100km | 6.010236 mpg (UK) |
| 48 L/100km | 5.885023 mpg (UK) |
| 49 L/100km | 5.76492 mpg (UK) |
| 50 L/100km | 5.649622 mpg (UK) |
| 60 L/100km | 4.708018 mpg (UK) |
| 70 L/100km | 4.035444 mpg (UK) |
| 80 L/100km | 3.531014 mpg (UK) |
| 90 L/100km | 3.138679 mpg (UK) |
| 100 L/100km | 2.824811 mpg (UK) |
Frequently asked questions
How many Miles per Gallon (UK) are in 1 Liters per 100km?
1 L/100km equals 282.481088 mpg (UK).
How do I convert Liters per 100km to Miles per Gallon (UK)?
Multiply the L/100km value by 282.481088. Example: 25 L/100km = 11.299244 mpg (UK).
What is 2.5 L/100km in mpg (UK)?
2.5 L/100km = 112.992435 mpg (UK).
Is the L/100km to mpg (UK) conversion exact?
No: fuel economy has inverse units. Litres per 100 km and gallons per mile fall as efficiency rises, so the conversion divides rather than multiplies.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.