How to Convert Horsepower to kWh

Car engines are often measured in horsepower.
••• motor image by Pablo Armelles from

Horsepower is a unit of power, while kilowatt-hours is a unit of energy. To go from horsepower to kilowatt-hours, you need to know how long the power is being exerted. For example, a 100-horsepower engine running for five minutes would use significantly fewer kilowatt-hours than the same engine running for five hours.

    Multiply the number of horsepower by the time the power is exerted. For example, if you have a 20-horsepower motor running for three hours, you would multiply 20 by 3 to get 60 horsepower-hours.

    Multiply the number of horsepower-hours by 0.7457 kilowatts per horsepower-hour to convert to kilowatt-hours. In this example, you would multiply 60 by 0.7457 to get 44.742 kilowatt-hours.

    Check your answer using an online calculator. Enter the horsepower and the appropriate amount of time, and the number of kilowatt-hours will be displayed.

Related Articles

How to Convert Horsepower to Foot Pounds
How to Convert KWH to KVA
How to Calculate KVA to MVA
How to Convert HP to BTU/hr
How to Calculate MBH
How Much Is a kWh?
How to Measure Electric Motor Torque
How to Convert BTU to Horsepower
How to Read a Time Clock in Hundredths of an Hour
How to Convert Amps to HP
How to Convert Watts into Kilowatt Hours
How to Convert Horsepower to Thrust
How to Calculate a Current From the HP & Voltage
How to Convert Therms to KWH
How to Calculate Amps From Horsepower
How to Convert 12 Volt Alternator to 120 Volts
How to Convert kWh to kBtu
How to Convert Reserve Capacity to Amp Hours
How to Convert HP to KVA