Fuel Consumption / km/L → mpg (US)
Convert Kilometers per liter to Miles per US liquid gallon
Convert vehicle fuel use and fuel economy with reciprocal formulas. Convert Kilometers per liter (km/L) to Miles per US liquid gallon (mpg (US)). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Miles per US liquid gallon to Kilometers per liter →
How to convert kilometers per liter to Miles per US liquid gallon
Consumption measures fuel per distance; economy measures distance per fuel. Their relationship is reciprocal. US and imperial mpg use different gallons. Inputs must be positive; zero fuel use would imply infinite economy.
Use x for the value in km/L, b for the intermediate value in L/100 km, and y for the result in mpg (US).
b = 100 ÷ x; y = 235.214583333 ÷ b
Worked examples
10 km/L ≈ 23.5214583333 mpg (US)
Step 1: 100 ÷ 10 ≈ 10 L/100 km.
Step 2: 235.214583333 ÷ 10 ≈ 23.5214583333 mpg (US).20 km/L ≈ 47.0429166667 mpg (US)
Step 1: 100 ÷ 20 ≈ 5 L/100 km.
Step 2: 235.214583333 ÷ 5 ≈ 47.0429166667 mpg (US).
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Kilometers per liter
Kilometers per liter relates inversely to Liters per 100 kilometers. The base value is 100 ÷ x, where x is the numerical value in km/L. A zero or negative reciprocal input is outside this calculator’s physical domain.
About Miles per US liquid gallon
Miles per US liquid gallon relates inversely to Liters per 100 kilometers. The base value is 235.214583333 ÷ x, where x is the numerical value in mpg (US). A zero or negative reciprocal input is outside this calculator’s physical domain.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Kilometers per liter to Miles per US liquid gallon reference table
| Kilometers per liter (km/L) | Miles per US liquid gallon (mpg (US)) |
|---|---|
| 1 | 2.35214583333 |
| 5 | 11.7607291667 |
| 10 | 23.5214583333 |
| 25 | 58.8036458333 |
| 50 | 117.607291667 |
| 100 | 235.214583333 |
| 1000 | 2352.14583333 |
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