Fuel Consumption / mpg (imp) → km/L
Convert Miles per imperial gallon to Kilometers per liter
Convert vehicle fuel use and fuel economy with reciprocal formulas. Convert Miles per imperial gallon (mpg (imp)) to Kilometers per liter (km/L). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Kilometers per liter to Miles per imperial gallon →
How to convert miles per imperial gallon 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 mpg (imp), b for the intermediate value in L/100 km, and y for the result in km/L.
b = 282.480936332 ÷ x; y = 100 ÷ b
Worked examples
10 mpg (imp) ≈ 3.54006189935 km/L
Step 1: 282.480936332 ÷ 10 ≈ 28.2480936332 L/100 km.
Step 2: 100 ÷ 28.2480936332 ≈ 3.54006189935 km/L.20 mpg (imp) ≈ 7.08012379869 km/L
Step 1: 282.480936332 ÷ 20 ≈ 14.1240468166 L/100 km.
Step 2: 100 ÷ 14.1240468166 ≈ 7.08012379869 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 Miles per imperial gallon
Miles per imperial gallon relates inversely to Liters per 100 kilometers. The base value is 282.480936332 ÷ x, where x is the numerical value in mpg (imp). A zero or negative reciprocal input is outside this calculator’s physical domain.
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.
Miles per imperial gallon to kilometers per liter reference table
| Miles per imperial gallon (mpg (imp)) | Kilometers per liter (km/L) |
|---|---|
| 1 | 0.354006189935 |
| 5 | 1.77003094967 |
| 10 | 3.54006189935 |
| 25 | 8.85015474837 |
| 50 | 17.7003094967 |
| 100 | 35.4006189935 |
| 1000 | 354.006189935 |
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