Power Unit Converter
Convert power measurements between watts, kilowatts, and horsepower for electrical and mechanical applications
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What is Power Unit Converter?
The Power Unit Converter transforms power measurements between watts, kilowatts, horsepower (mechanical), BTU per hour, and foot-pounds per second. These are the most common power units used in engineering, automotive, HVAC, and physics. You enter a value in one unit and see the equivalent in all others. All processing happens in the browser.
How does Power Unit Converter work?
This tool applies standard power conversion factors: 1 horsepower = 745.7 watts, 1 BTU/hour = 0.293071 watts, 1 foot-pound/second = 1.35582 watts. The tool normalizes to watts internally and converts to all other units.
Key Features
- Converts watts, kW, hp, BTU/h, ft-lb/s
- Exact conversion factors
- Real-time conversion as you type
- Shows all units at once
- Copy any value to clipboard
- Runs in the browser with no uploads
- Six decimal place precision
- Quick preset values
Common Use Cases
Comparing motor ratings
Convert a motor rated in horsepower to kilowatts for comparison with European specifications.
HVAC system sizing
Convert BTU/hour ratings to watts for heating and cooling equipment comparison.
Automotive engineering
Convert engine power from horsepower to kilowatts for international specifications.
Physics calculations
Convert between power units for energy and work problems.
How to Use This Tool
Enter a value
Type the power and select the source unit.
View all conversions
The tool shows the equivalent in all five units.
Copy a value
Copy the unit you need.
Pro Tips
- 1
1 horsepower = 745.7 watts = 0.7457 kilowatts.
- 2
1 kilowatt = 1.341 horsepower.
- 3
1 BTU/hour = 0.293 watts. A 10,000 BTU AC is about 2,930 watts.
- 4
Horsepower is used in the US for engines. Kilowatts are used internationally.
Frequently Asked Questions
What units are supported?
Watts, kilowatts, mechanical horsepower, BTU per hour, and foot-pounds per second.
How do I convert horsepower to kilowatts?
Multiply horsepower by 0.7457. A 200 hp engine is about 149.1 kilowatts.
Is my data sent to a server?
No. All conversion happens in your browser. Nothing is transmitted.
What is BTU/hour used for?
BTU/hour is commonly used to rate heating and cooling equipment like air conditioners and furnaces.
Can I convert decimal values?
Yes. The tool accepts any positive number including decimals.