Imperial Miles per Gallon to Liters per 100 km
40 imperial miles per gallon equals 7.062 liters per 100 km. The two run in opposite directions, so a higher figure on one side is a lower figure on the other.
L/100km = 282.4809363 ÷ MPG (UK)
By Piero Nanni · Last checked
Imperial Miles per Gallon to Liters per 100 km Calculator
How to Convert Imperial Miles per Gallon to Liters per 100 km
Formula:
L/100km = 282.4809363 ÷ MPG (UK)
Worked example:
282.4809363 ÷ 40 = 7.062 L/100km
Imperial Miles per Gallon to Liters per 100 km Conversion Table
| MPG (UK) | L/100km |
|---|---|
| 15 | 18.8321 |
| 20 | 14.124 |
| 25 | 11.2992 |
| 30 | 9.416 |
| 35 | 8.0709 |
| 40 | 7.062 |
| 45 | 6.2774 |
| 50 | 5.6496 |
| 55 | 5.136 |
| 60 | 4.708 |
| 70 | 4.0354 |
| 75 | 3.7664 |
| 80 | 3.531 |
| 90 | 3.1387 |
| 100 | 2.8248 |
About This Conversion
Imperial miles per gallon to liters per 100 km converts UK fuel-economy figures, which use the 4.54609-liter imperial gallon, into the metric standard. Divide 282.4809363 by the MPG figure.
The gallon difference is why a UK figure always looks better than a US one for the same car. A car doing 48 UK MPG and one doing 40 US MPG are equally efficient, both around 5.9 L/100km. Comparing a UK road-test figure directly against a US EPA figure overstates the UK car by about 20 percent.
Frequently Asked Questions
What is 40 UK MPG in L/100km?
40 imperial MPG is 7.06 L/100km.
What is the formula?
Divide 282.4809363 by the imperial MPG figure. The constant is 100 × 4.54609 ÷ 1.609344.
How does UK MPG compare to US MPG?
An imperial MPG figure is about 1.201 times the US figure for the same car, because the imperial gallon is larger.
Which gallon do UK car reviews use?
The imperial gallon, 4.54609 liters.