Want to convert **US mpg to l/100km?** Use our super simple **US miles per gallon to litres per 100 kilometres** conversion calculator below to get started.

To begin, simply input the number of **US MPG you need to convert to l/100km** into the input box and you’ll get an automatic conversion.

This converter is programmed to **convert US MPG**, not imperial MPG. You can also use our other MPG to l/100km calculator if you need to convert UK MPG to l/100km.

**235.21 ÷ the MPG number.**

**Example 1:** The formula needed to convert 40 MPG to l/100km would be: **235.21 ÷ 40 = 5.88 l/100km.**

**Example 2:** The formula needed to convert 45 MPG to l/100km would be: **235.21 ÷ 45 = 5.23 l/100km.**

**Example 3:** The formula needed to convert 54 MPG to l/100km would be: **235.21 ÷ 54 = 4.36 l/100km.**

### What is l/100km

L/100km (litres per 100 kilometres) is a measurement of fuel efficiency. It tells you how much fuel a car needs to travel 100 kilometres.

The lower the number, the more fuel-efficient the car is. So, if a car has an l/100km rating of 6.5, it means it uses 6.5 litres of fuel to travel 100 km.

### Why convert US MPG to l/100km

Converting US miles per gallon (MPG) to l/100km is a great way to compare the fuel efficiency of different cars, both within the US and across different countries.

This provides a basis for comparison for car buyers, who can easily see how their chosen vehicle stacks up against other models in terms of fuel economy.

It is also beneficial for understanding a vehicle’s fuel efficiency compared to other models that may be using different standards.

### US MPG to l/100km Conversion Table

20 MPG to L/100km = 11.76 | 35 MPG to L/100km = 6.72 | 50 MPG to L/100km = 4.70 |

21 MPG to L/100km = 11.20 | 36 MPG to L/100km = 6.53 | 51 MPG to L/100km = 4.61 |

22 MPG to L/100km = 10.69 | 37 MPG to L/100km = 6.36 | 52 MPG to L/100km = 4.52 |

23 MPG to L/100km = 10.23 | 38 MPG to L/100km = 6.19 | 53 MPG to L/100km = 4.44 |

24 MPG to L/100km = 9.80 | 39 MPG to L/100km = 6.03 | 54 MPG to L/100km = 4.36 |

25 MPG to L/100km = 9.41 | 40 MPG to L/100km = 5.88 | 55 MPG to L/100km = 4.28 |

26 MPG to L/100km = 9.05 | 41 MPG to L/100km = 5.74 | 56 MPG to L/100km = 4.20 |

27 MPG to L/100km = 8.71 | 42 MPG to L/100km = 5.60 | 57 MPG to L/100km = 4.13 |

28 MPG to L/100km = 8.40 | 43 MPG to L/100km = 5.47 | 58 MPG to L/100km = 4.06 |

29 MPG to L/100km = 8.11 | 44 MPG to L/100km = 5.35 | 59 MPG to L/100km = 3.99 |

30 MPG to L/100km = 7.84 | 45 MPG to L/100km = 5.23 | 60 MPG to L/100km = 3.92 |

31 MPG to L/100km = 7.59 | 46 MPG to L/100km = 5.11 | 61 MPG to L/100km = 3.86 |

32 MPG to L/100km = 7.35 | 47 MPG to L/100km = 5.00 | 62 MPG to L/100km = 3.79 |

33 MPG to L/100km = 7.13 | 48 MPG to L/100km = 4.90 | 63 MPG to L/100km = 3.73 |

34 MPG to L/100km = 6.92 | 49 MPG to L/100km = 4.80 | 64 MPG to L/100km = 3.68 |