Automotive & Engines

Basic

Fuel Economy (L/100km)

Litres of fuel used per 100 km travelled.

Formula

E = \frac{100\, F}{d}

Live Calculator

Members

Variables

EConsumption (L/100km)

FFuel used (L)

dDistance (km)

Example

40 L over 500 km: E = 8 L/100km

Did You Know?

Europe measures fuel use as L/100km (lower is better) while the US uses mpg (higher is better) — inverse scales.

automotive fuel economy

Share this formula

More in Automotive & Engines

Power from Torque & RPM

Engine power in kW from torque and rotational speed.

Horsepower from Torque (Imperial)

Horsepower from torque (lb-ft) and engine rpm.

Compression Ratio

Ratio of cylinder volume at bottom vs top of the stroke.

Engine Displacement

Total swept volume of all cylinders.

Gear Ratio

Ratio of driven to driving gear teeth.

Vehicle Speed from RPM

Road speed from engine rpm, gearing and tyre diameter.