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Miles Per Gallon To Litres Per 100 km Calculator

Work out miles per gallon to litres per 100 km instantly with clear inputs, formula shown and shareable results.

About Miles Per Gallon To Litres Per 100 km Calculator

mpg and L/100 km are reciprocals, so the same constant converts in both directions: divide it by the figure you have. For US gallons that constant is 235.214583; for Imperial gallons it is 282.480936. Because the operation is a division rather than a multiplication, the conversion is symmetric — running it twice returns the original number.

Formulas

US gallons

L/100 km = 235.214583 ÷ mpg and mpg = 235.214583 ÷ L/100 km

Imperial gallons

L/100 km = 282.480936 ÷ mpg and mpg = 282.480936 ÷ L/100 km

Worked example

With the default values below, Miles Per Gallon To Litres Per 100 km Calculator returns Converted Value of 7.840. Change any input above and every figure here is recalculated in your browser.

Inputs used

Value to convertminimum 0.1
30
Directionone of mpg → L/100 km, L/100 km → mpg
mpg → L/100 km
Gallon typeone of US gallon (3.785 L), Imperial gallon (4.546 L)
US gallon (3.785 L)

Results

Converted Value
7.840
Result Unit
L/100 km
Conversion Constant
235.214583

Step by step

  1. 1Values used
  2. 2US gallons
  3. 3Imperial gallons
  4. 4Converted Value= 7.840
  5. 5Result Unit= L/100 km
  6. 6Conversion Constant= 235.214583

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 6 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What is 30 mpg in L/100 km?

On US gallons, 235.214583 ÷ 30 = 7.84 L/100 km. On Imperial gallons it is 282.480936 ÷ 30 = 9.42 L/100 km.

Why is the same constant used both ways?

Because the two units are reciprocals. If y = k/x then x = k/y, so one constant and one division covers both directions.

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Miles Per Gallon To Litres Per 100 km Calculator | Calcrivo