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Power Converter

Convert between power units including Watts, Kilowatts, Horsepower, BTU/hour, and more. Instant, accurate, and completely free.

From

📊 Quick Reference

1 Horsepower

≈ 745.7 W

1 Kilowatt

= 1000 W

1 BTU/h

≈ 0.293 W

1 Megawatt

= 1,000,000 W

💡 How to Use This Tool

Convert between power units instantly with our easy-to-use converter. Follow these simple steps:

Enter Value

Type the power value you want to convert in the input field.

Select Units

Choose the source and target units from the dropdown menus.

View Result

The converted value appears instantly as you type or change units.

Copy Result

Click "Copy Result" to copy the value to your clipboard.

📖 About Power Converter

What is Power?

Power is the rate at which energy is transferred, used, or converted. It measures how quickly work is done or energy is consumed. In physics, power is defined as energy per unit time.

Common Power Units

Watt (W)

The SI unit of power, equal to one joule per second. Named after James Watt, the inventor who improved the steam engine.

Kilowatt (kW)

Equal to 1,000 watts. Commonly used for household appliances and small machinery.

Megawatt (MW)

Equal to 1,000,000 watts. Used for large power plants and industrial applications.

Horsepower (hp)

A traditional unit originally defined by James Watt. One mechanical horsepower equals approximately 745.7 watts.

BTU per Hour (BTU/h)

British Thermal Units per hour, commonly used for heating and cooling systems in the US.

Common Use Cases

Electrical Engineering: Converting between electrical power ratings
HVAC Systems: Comparing heating and cooling capacities
Automotive: Understanding engine power specifications
Solar Energy: Calculating solar panel outputs
Home Appliances: Comparing energy consumption

Privacy & Security

This converter runs entirely in your browser. Your data never leaves your device. All calculations happen locally for complete privacy.

❓ Frequently Asked Questions

Yes! All conversions happen locally in your browser using JavaScript. Your data never leaves your device and is not sent to any server.

This tool supports Watts (W), Kilowatts (kW), Megawatts (MW), Horsepower (hp), BTU per hour (BTU/h), Foot-pounds per minute (ft-lb/min), Calories per second (cal/s), and Joules per second (J/s).

Watts are the SI unit of power, while Horsepower is a traditional unit. One mechanical horsepower equals approximately 745.7 watts. Horsepower is commonly used for engines and motors, while Watts are used for electrical power.

Our converter uses standard conversion factors and provides results with up to 6 decimal places for accuracy. The calculations follow internationally accepted conversion standards.

Version History

1.0.0

Initial release

Jan 24, 2026