Fuel Consumption / L/100 km → km/L
Convert Liters per 100 kilometers to Kilometers per liter
Convert vehicle fuel use and fuel economy with reciprocal formulas. Convert Liters per 100 kilometers (L/100 km) to Kilometers per liter (km/L). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Kilometers per liter to Liters per 100 kilometers →
How to convert liters per 100 kilometers to kilometers per liter
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/100 km, b for the intermediate value in L/100 km, and y for the result in km/L.
b = (x × 1); y = 100 ÷ b
Worked examples
10 L/100 km ≈ 10 km/L
Step 1: (10 × 1) ≈ 10 L/100 km.
Step 2: 100 ÷ 10 ≈ 10 km/L.20 L/100 km ≈ 5 km/L
Step 1: (20 × 1) ≈ 20 L/100 km.
Step 2: 100 ÷ 20 ≈ 5 km/L.
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 100 kilometers
Liters per 100 kilometers (L/100 km) measures fuel consumption under the conventions above. The base value in L/100 km is (x × 1), where x is the numerical value in L/100 km. Factors shown here are rounded for display; calculations use the stored factor.
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.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Liters per 100 kilometers to kilometers per liter reference table
| Liters per 100 kilometers (L/100 km) | Kilometers per liter (km/L) |
|---|---|
| 1 | 100 |
| 5 | 20 |
| 10 | 10 |
| 25 | 4 |
| 50 | 2 |
| 100 | 1 |
| 1000 | 0.1 |
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