6 L/100 km to mpg (US)
- Liters per 100 km (L/100 km)
- 6 L/100 km
- US miles per gallon
- 39.2024305556 mpg (US)
Checked against: Exact-fraction computation from the legal unit definitions
Liters per 100 km to US miles per gallon converter
Convert liters per 100 km to US miles per gallon (L/100km to mpg) with the exact formula, a conversion chart and worked steps.
By AdminDrafted with AI writing toolsUpdated Checked examples: 3
US miles per gallon
mpg (US)
US miles per gallon: 39.2024305556 mpg (US)
- Conversion
- 6 L/100 km = 39.2024305556 mpg (US)
- 1 mpg (US) in liters per 100 km
- 235.2145833L/100 km
6 L/100 km is about 39.2024305556 mpg (US). In the other direction, 1 mpg (US) ≈ 235.21458333 L/100 km.
Liters per 100 km to US miles per gallon
L/100km to mpg chart
| Liters per 100 km | US miles per gallon |
|---|---|
| 3 | 78.4049 |
| 4 | 58.8036 |
| 5 | 47.0429 |
| 6 | 39.2024 |
| 7 | 33.6021 |
| 8 | 29.4018 |
| 10 | 23.5215 |
| 12 | 19.6012 |
| 15 | 15.681 |
How it's calculated S
Apply the formula
About the liters per 100 km to US miles per gallon converter
Liters per 100 kilometers describe fuel used over a fixed distance. A lower number means less fuel for the same route. Restating consumption as US mpg produces a reciprocal relationship, so halving consumption doubles the distance-per-gallon result.
litre per 100 km → mile per US gallon uses a reciprocal formula: fuel consumption per distance is the reciprocal of distance per fuel. For example, 6 L/100 km is about 39.2024 mpg (US).
At 1 US mpg, fuel consumption is approximately 235.214583 L/100 km, calculated as 100 km × 3.785411784 L/US gal ÷ 1.609344 km/mi. Higher mpg means lower L/100 km, and the relationship is a curve, not a straight line.
How to convert L/100 km to mpg
Divide 235.215 by the liters per 100 km: US mpg = 235.214583… ÷ L/100 km. So 6 L/100 km is 39.20 US mpg and 8 L/100 km is 29.40 mpg. The scales are reciprocal: lower consumption gives higher mpg, and halving the liters doubles the mpg.
Why 6 L/100 km is 39.2 mpg
6 L/100 km means 6 liters of fuel for every 100 km. In US units that is 6 ÷ 3.785411784 = 1.585 gallons for 100 ÷ 1.609344 = 62.137 miles, and 62.137 ÷ 1.585 = 39.20 mpg.
Folding those steps into one number gives 100 × 3.785411784 ÷ 1.609344 = 235.214583…, so any figure converts as 235.214583… ÷ L/100 km (NIST SP 811, Appendix B; Handbook 44, Appendix C).
L/100 km to US mpg chart
| Liters per 100 km | US mpg |
|---|---|
| 3 | 78.404861 |
| 4 | 58.803646 |
| 5 | 47.042917 |
| 6 | 39.202431 |
| 8 | 29.401823 |
| 10 | 23.521458 |
US mpg or UK mpg?
British fuel figures use the imperial gallon of 4.54609 L (imperial definition), so the constant becomes 282.481. The same 6 L/100 km is 47.08 UK mpg but 39.20 US mpg.
Check which gallon a comparison uses before deciding which car is more economical.
From a fuel log to mpg
Work out L/100 km first: liters used ÷ km driven × 100. A fill-up of 42 L after 600 km is 7 L/100 km, or 33.60 US mpg. The gas mileage calculator does this from odometer readings.
Heavier use scales the same way: 12 L/100 km is 19.6012152778 US mpg, exactly half the figure for 6 L/100 km.
Kilometers per liter
Some countries rate cars in km/L, another reciprocal of L/100 km: km/L = 100 ÷ L/100 km. So 5 L/100 km is 20 km/L, and 8 L/100 km is 12.5 km/L.
Common mistakes
- Multiplying instead of dividing. 6 × 235.215 is about 1,411, which is not an mpg. Divide the constant by the consumption.
- Comparing a UK mpg with a US one. A car rated 47 UK mpg does about 39 US mpg, so next to a US rating of 40 mpg it looks better than it is.
- Judging savings by the mpg jump. Going from 8 to 6 L/100 km saves 2 L per 100 km, or 10 L over 500 km. The rise from 29.40 to 39.20 mpg hides that figure.
Related fuel conversions
The mpg to L/100 km converter goes the other way, the fuel economy converter gives UK mpg and km/L directly, and the trip fuel cost calculator prices a journey.
Worked examples
12 L/100 km to mpg (US)
- Liters per 100 km (L/100 km)
- 12 L/100 km
- US miles per gallon
- 19.6012152778 mpg (US)
Checked against: Exact-fraction computation from the legal unit definitions
3 L/100 km to mpg (US)
- Liters per 100 km (L/100 km)
- 3 L/100 km
- US miles per gallon
- 78.4048611111 mpg (US)
Checked against: Exact-fraction computation from the legal unit definitions
Questions
What is the formula to convert litre per 100 km → mile per US gallon?
Divide 235.214583 by the value: 30 US mpg → 235.214583 ÷ 30 ≈ 7.84 L/100 km; 6 L/100 km → 235.214583 ÷ 6 ≈ 39.2 mpg. The same formula works in both directions because each unit is the reciprocal of the other, scaled. The constant shown is rounded.
About this calculator
Sources
Checked against references
This calculator includes 3 worked examples with independently sourced answers. They run in the test suite, and you can run them here too.