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Glossary Science & Engineering

Fuel economy

Fuel economy is how far a vehicle travels on a unit of fuel (miles per gallon, km per litre) or how much fuel it uses over a distance (litres per 100 km).

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In more detail

L/100 km = 235.215 / mpg, so 30 mpg is 7.84 L/100 km. A 300-mile trip at 30 mpg uses 10 gallons, costing $35 at $3.50 a gallon. Higher mpg is better, but lower L/100 km is better.

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Fuel Cost Calculator

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Calculate your vehicle's fuel efficiency (MPG or L/100km) from the distance traveled and fuel used, plus your cost per mile or kilometer.

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Estimate the cost of charging your electric vehicle from your battery size, charge level.

See also

  • Glossary Kilowatt-hour (kWh)
    A kilowatt-hour is the energy used by a 1,000-watt device running for one hour, the unit on electricity bills.
  • Cheat sheet Vehicle Formulas Cheat Sheet
    Fuel cost, mpg and L/100 km, tire diameter and speedometer error, horsepower from torque or trap speed and EV charging cost.
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