Sizing a supply
A 2 hp pump draws about 1,491 watts, or roughly 1.5 kW.
Use Horsepower to Watts
Converts horsepower to watts in this tab, with nothing sent anywhere.
Runs entirely on your deviceThe conversion happens in this browser tab. Nothing you type is uploaded, logged or stored, which is worth knowing for anything you would not paste into a search box.
Two mechanical horsepower correspond to about 1,491 watts of output power. A real motor can draw more electrical power because of efficiency losses, startup current, and power factor, so this result alone is not enough to size a circuit.
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Browse all general convertersAbout Horsepower to Watts
Horsepower rates engines and motors in the automotive and machinery world, but to work in metric or electrical terms you convert to watts. Converting horsepower to watts turns an engine or motor's horsepower figure into the SI unit of power used in electrical and scientific work. One horsepower is about 746 watts. The conversion matters when a horsepower-rated device has to be sized against an electrical supply or a metric spec - wiring a motor, comparing a petrol tool against an electric one, or reading an old rating in modern units. Dividing the result by 1,000 gives kilowatts, which is how larger motors and EV outputs are usually quoted. Generators, pumps and power tools cross between horsepower and watts depending on their origin, so translating horsepower to watts is a routine step in specifying electrical equipment. Because one horsepower is about 746 watts, multiplying horsepower by roughly 746 gives the wattage. A motor power rating is not necessarily its electrical input power; efficiency separates those two measurements.
Using Horsepower to Watts
- Type a number of hp. You can paste a value with its unit; the tool reads the number.
- The exact factor is applied and the result is shown as W, updating live as you type.
- Copy the answer, or switch to the reverse converter to go from W back to hp.
Where horsepower to watts helps
Both directions
Need the opposite? The W-to-hp converter is linked below and uses the exact inverse factor.
Before you use the result
- The result is rounded for readability; the underlying factor is exact, so a value converted and back may differ in the last decimal place.
- Units in your input are ignored - only the number is read - so make sure the figure you type is really in hp.
Questions about Horsepower to Watts
How many watts is 1 hp?
About 746 watts for mechanical horsepower. So 2 hp is roughly 1,491 watts, or about 1.5 kilowatts.
Is my data uploaded?
No. Horsepower to Watts does the arithmetic in this browser tab; the value is calculated on your device and is not sent to a server.
Related tools
Watts to Horsepower
Convert watts to mechanical horsepower with worked motor examples. Understand kW inputs, metric PS, rounding and electrical input versus mechanical shaft output.