Miles per US gallon to Liters per 100 km Converter
1 mpg (US) equals 235.21458 L/100km, and 1 L/100km equals 235.21458 mpg (US). Enter a value in either box to convert miles per us gallon to liters per 100 km and back. Formula: km/L = mpg x 1.609344 / 3.785411784 (US) ; L/100km = 100 / (km/L) ; mpg and L/100km are reciprocals.
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1 mpg (US) = 235.21458 L/100km
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
Miles per US gallon to Liters per 100 km Conversion Table
| Miles per US gallon | Liters per 100 km |
|---|---|
| 5 mpg (US) | 47.042917 L/100km |
| 8 mpg (US) | 29.401823 L/100km |
| 10 mpg (US) | 23.521458 L/100km |
| 15 mpg (US) | 15.680972 L/100km |
| 20 mpg (US) | 11.760729 L/100km |
| 25 mpg (US) | 9.4085833 L/100km |
| 30 mpg (US) | 7.8404861 L/100km |
| 40 mpg (US) | 5.8803646 L/100km |
| 50 mpg (US) | 4.7042917 L/100km |
Liters per 100 km to Miles per US gallon Conversion Table
| Liters per 100 km | Miles per US gallon |
|---|---|
| 5 L/100km | 47.042917 mpg (US) |
| 8 L/100km | 29.401823 mpg (US) |
| 10 L/100km | 23.521458 mpg (US) |
| 15 L/100km | 15.680972 mpg (US) |
| 20 L/100km | 11.760729 mpg (US) |
| 25 L/100km | 9.4085833 mpg (US) |
| 30 L/100km | 7.8404861 mpg (US) |
| 40 L/100km | 5.8803646 mpg (US) |
| 50 L/100km | 4.7042917 mpg (US) |
Worked example: 10 mpg (US) = 23.521458 L/100km. A car rated at 30 mpg (US) uses 235.215 / 30 = 7.84 L/100km. The same car in UK mpg is about 36 mpg.
Need other units? Open the full Fuel Economy Converter.
Popular Fuel Economy Conversions
Formula
km/L = mpg x 1.609344 / 3.785411784 (US) ; L/100km = 100 / (km/L) ; mpg and L/100km are reciprocalsUnderstanding Fuel Economy Conversion
Fuel economy is expressed two opposite ways. Miles per gallon and kilometers per liter measure distance per unit of fuel, so higher is better. Liters per 100 kilometers measures fuel per distance, so lower is better, and it is the reciprocal of the others. US and UK gallons differ by about 20 percent, so a UK mpg figure is higher than the US figure for the same car.
Tips and Best Practices
- 1Divide 235.215 by the US mpg figure to get L/100km, and the other way round.
- 2Divide 282.481 by the UK mpg figure to get L/100km.
- 3Compare cars in the same unit, ideally L/100km, to see fuel saved per distance.
Real-World Example
A car rated at 30 mpg (US) uses 235.215 / 30 = 7.84 L/100km. The same car in UK mpg is about 36 mpg.
Common Mistakes to Avoid
- Comparing a US mpg figure with a UK mpg figure directly.
- Assuming a 10 mpg improvement saves the same fuel from 15 to 25 mpg as from 40 to 50 mpg (it does not).
- Dividing instead of using the reciprocal when switching between mpg and L/100km.
How to Use
- Type a number in the Miles per US gallon box.
- The Liters per 100 km result appears instantly; you can also edit the Liters per 100 km box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many liters per 100 km are in 1 mpg (US)?
How many miles per us gallon are in 1 L/100km?
What is the formula to convert miles per us gallon to liters per 100 km?
Is 30 mpg good?
Sources: NIST SP 811 (mile, US gallon); UK imperial gallon = 4.54609 L.