Convert between various units of power, including watts, kilowatts, horsepower, BTU per hour, and megawatts.
Divide the number of watts by 746 to get horsepower.
hp = W ÷ 746
Example: 1500 W ÷ 746 = 2.01 hp
Multiply the number of kilowatts by 1.34102 to get horsepower.
hp = kW × 1.34102
Example: 10 kW × 1.34102 = 13.4102 hp
Multiply the number of horsepower by 746 to get watts.
W = hp × 746
Example: 2 hp × 746 = 1492 W
Designing circuits and systems
Comparing engine performance
Energy consumption calculations
Solar panels and wind turbines sizing
Power is the rate at which energy is transferred, used, or transformed. The SI unit of power is the watt (W), which is equal to one joule of energy per second.
The SI unit of power, defined as one joule per second. Named after James Watt, the inventor of the steam engine.
Equal to 1,000 watts, commonly used for measuring the power of engines, electric motors, and household appliances.
Equal to 1,000,000 watts or 1,000 kilowatts, often used to measure the output of power plants or large-scale industrial equipment.
Originally defined by James Watt as the power a horse can sustain while working. One mechanical horsepower equals approximately 746 watts.
British Thermal Unit per hour, commonly used in heating, air conditioning, and refrigeration industries, especially in the United States.
It's important to understand the difference between power and energy:
Power is the rate at which energy is transferred or work is done (measured in watts)
Energy is the capacity to do work (measured in joules, kilowatt-hours, etc.)
For example, a 100-watt light bulb running for 10 hours consumes 1 kilowatt-hour (kWh) of energy
