Home/conversion/Fuel Economy Converter

Fuel Economy Converter

Convert fuel economy instantly between miles per gallon (MPG), liters per 100km, and kilometers per liter.

Convert Fuel Economy

Value

From Unit

To Unit

Result

Live

30 MPG (US) equals

0 L/100km

How to Calculate & Formula Details

Mathematical Model FormulaL/100km = 235.214583 / MPG (US). km/L = 100 / (L/100km).

A fuel economy converter translates vehicle efficiency ratings between the US standard (miles per gallon) and the metric standards used elsewhere (liters per 100km, or km per liter).

Why the Conversion is Inverted

MPG and km/L measure distance per unit of fuel (higher is better), while L/100km measures fuel used per fixed distance (lower is better) — so the relationship between MPG and L/100km is inverse, not linear.

Key Formula

L/100km = 235.214583 / MPG (using US gallons). This inverse relationship means doubling your MPG does not simply halve your L/100km in a linear sense at every point of the scale.

Frequently Asked Questions

How do I convert MPG to L/100km?

Divide 235.214583 by your MPG value (using US gallons) to get liters per 100 kilometers.

Is UK MPG different from US MPG?

Yes. A UK (imperial) gallon is larger than a US gallon, so UK MPG figures are typically about 20% higher than the equivalent US MPG for the same fuel efficiency.

What does a lower L/100km number mean?

A lower L/100km value means better fuel efficiency — the vehicle uses less fuel to travel the same distance.

Related Calculators in conversion

conversion

Speed Converter

Convert speed instantly between miles per hour, kilometers per hour, meters per second, and knots.

Computeâ†’

conversion

Volume Converter

Convert volume instantly between liters, gallons, milliliters, cups, fluid ounces, and cubic meters.

Computeâ†’

everyday

Unit Conversion Calculator

Convert between imperial and metric units for length, weight, area, volume, and temperature.

Computeâ†’