Fuel Consumption / L/km → mpg (US)
Convert Liters per kilometer to Miles per US liquid gallon
Convert vehicle fuel use and fuel economy with reciprocal formulas. Convert Liters per kilometer (L/km) 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 Liters per kilometer →
How to convert liters per kilometer 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 L/km, b for the intermediate value in L/100 km, and y for the result in mpg (US).
b = (x × 100); y = 235.214583333 ÷ b
Worked examples
10 L/km ≈ 0.235214583333 mpg (US)
Step 1: (10 × 100) ≈ 1000 L/100 km.
Step 2: 235.214583333 ÷ 1000 ≈ 0.235214583333 mpg (US).20 L/km ≈ 0.117607291667 mpg (US)
Step 1: (20 × 100) ≈ 2000 L/100 km.
Step 2: 235.214583333 ÷ 2000 ≈ 0.117607291667 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 Liters per kilometer
Liters per kilometer (L/km) measures fuel consumption under the conventions above. The base value in L/100 km is (x × 100), where x is the numerical value in L/km. Factors shown here are rounded for display; calculations use the stored factor.
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.
Liters per kilometer to Miles per US liquid gallon reference table
| Liters per kilometer (L/km) | Miles per US liquid gallon (mpg (US)) |
|---|---|
| 1 | 2.35214583333 |
| 5 | 0.470429166667 |
| 10 | 0.235214583333 |
| 25 | 0.0940858333333 |
| 50 | 0.0470429166667 |
| 100 | 0.0235214583333 |
| 1000 | 0.00235214583333 |
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