US Miles per Gallon to Liters per 100 km
30 US miles per gallon equals 7.84 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 = 235.2145833 ÷ MPG (US)
By Piero Nanni · Last checked
US Miles per Gallon to Liters per 100 km Calculator
How to Convert US Miles per Gallon to Liters per 100 km
Formula:
L/100km = 235.2145833 ÷ MPG (US)
Worked example:
235.2145833 ÷ 30 = 7.8405 L/100km
US Miles per Gallon to Liters per 100 km Conversion Table
| MPG (US) | L/100km |
|---|---|
| 10 | 23.5215 |
| 15 | 15.681 |
| 20 | 11.7607 |
| 25 | 9.4086 |
| 30 | 7.8405 |
| 35 | 6.7204 |
| 40 | 5.8804 |
| 45 | 5.227 |
| 50 | 4.7043 |
| 55 | 4.2766 |
| 60 | 3.9202 |
| 70 | 3.3602 |
| 75 | 3.1362 |
| 80 | 2.9402 |
| 90 | 2.6135 |
| 100 | 2.3521 |
About This Conversion
US miles per gallon to liters per 100 km is the conversion between the two ways the world states fuel economy, and the one place a converter genuinely earns its keep, because the relationship inverts. MPG counts distance per fuel, so higher is better; L/100km counts fuel per distance, so lower is better.
Because it is a division rather than a multiplication, equal steps in MPG are not equal steps in fuel use. Going from 15 to 20 MPG saves 3.9 L/100km; going from 40 to 45 saves only 0.65. That is why efficiency gains at the thirsty end of the range matter far more than the same gain on an already economical car.
Frequently Asked Questions
What is 30 MPG in L/100km?
30 US MPG is 7.84 L/100km.
What is the formula?
Divide 235.2145833 by the US MPG figure. The constant is 100 × 3.785411784 ÷ 1.609344.
Is a lower L/100km better?
Yes. L/100km measures fuel used over a fixed distance, so a smaller number means a more efficient car.
Why can I not just multiply?
The two units are inverses. One is distance per fuel and the other fuel per distance, so the conversion is a division.
Sources
Worth Knowing
Related Conversions
Converting the other way? Liters per 100 km to US Miles per Gallon
Need a different unit? Open the full fuel economy converter