Power Converter
Convert between any power units instantly. Our free power converter handles watts, kilowatts, horsepower, BTU/hour, and more. Real-time conversions with high precision for electrical, mechanical, and HVAC applications.
Enter a value to see conversions
Common Appliances
All conversions happen in your browser. No data is sent to any server.
Embed This Tool
Add this tool to your website with customizable styling
How to Use
- 1 Enter a power value in the input field at the top of the converter.
- 2 Select your input unit from the dropdown menu (watts, kilowatts, horsepower, BTU/hour, etc.).
- 3 Choose your target unit from the second dropdown to see the converted value instantly.
- 4 View all conversions in the reference table below showing your power value in all supported units.
- 5 Use appliance examples - Click on common appliances (light bulb, microwave, car engine) to see their typical power consumption in all units.
Pro Tip: Understanding power ratings helps you size generators, compare appliances, and calculate electricity costs. Check the appliance reference section for typical power consumption!
Frequently Asked Questions
What's the difference between power and energy?
Power (watts) is the rate of energy use per time, while energy (joules or kWh) is the total amount used. A 100W light bulb uses 100 watts of power; running it for 10 hours uses 1 kWh of energy.
How do I convert horsepower to watts?
One mechanical horsepower equals 745.7 watts. So a 200 HP car engine produces about 149,140 watts (149 kW) of power. Note: metric horsepower (PS) is slightly different at 735.5 watts.
What is BTU/hour used for?
BTU per hour (BTU/h) is commonly used to rate air conditioners, heaters, and furnaces. For example, a 12,000 BTU/h air conditioner has about 3.5 kW of cooling power.
Why are there different types of horsepower?
Mechanical horsepower (hp) is used in the US (745.7 W), while metric horsepower (PS) is used in Europe (735.5 W). Electrical horsepower is exactly 746 W. The differences are small but important for precise engineering.