How Power Converter Works
The watt — one joule per second — is the base unit for power. A kilowatt is exactly 1,000 watts, and a mechanical horsepower is defined as 745.7 watts, so your input is multiplied by its own unit's factor to reach watts, then divided by each other unit's factor to fill out the rest of the results.
How to Use This Tool
- Enter the power value you want to convert.
- Choose the unit it's currently in — watts, kilowatts, horsepower or megawatts.
- The results box shows that power converted into every other unit, updating live.
- Select Reset to clear the field and start over.
Example
A 150-kilowatt electric motor equals 150,000 watts, which converts to about 201.15 horsepower (150,000 ÷ 745.7) — or 0.15 megawatts (150,000 ÷ 1,000,000).
Helpful Tips
- Household appliances are usually rated in watts, while vehicle and motor power is typically quoted in horsepower or kilowatts depending on the region.
- Power plant and large industrial output is generally measured in megawatts because wattage figures would otherwise run into the millions.
Frequently Asked Questions
Which horsepower definition does this converter use?
Mechanical horsepower, defined as 745.7 watts. There are other variants — metric horsepower and electrical horsepower differ slightly — so figures from those definitions may not match exactly.
What's the difference between power and energy?
Power is the rate energy is used or produced, measured in watts; energy is the total amount, measured in units like joules or kilowatt-hours. This tool only converts power (the rate), not the total energy used over time.
Why do car specs sometimes list both kW and hp?
Different regions use different conventions — many European markets favor kilowatts while the US and UK commonly use horsepower — so manufacturers often list both to cover international audiences.
How much is a megawatt in everyday terms?
One megawatt is a million watts — roughly enough to simultaneously power around 1,000 average homes' worth of electricity demand, which is why the unit is reserved for power plants and large-scale industrial equipment rather than household devices.
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