Power Converter
Convert watts, kilowatts, horsepower, BTU/h & 20+ power units instantly. Used by electrical engineers, HVAC pros & mechanics. Free, no sign-up, displays up to 15 decimals.
Last revised
By Team GlobalCalqulate · About our editorial standards
Frequently Asked Questions
Clear answers to common questions to help you use this calculator confidently.
How do I convert kilowatts to horsepower?
Tap to view the answer
How do I convert kilowatts to horsepower?
Tap to view the answer
Multiply kW by 1.341 (mechanical horsepower). Example: 1 kW × 1.341 = 1.341 HP. To go the other way, divide HP by 1.341 to get kW.
What is 1 horsepower in watts?
Tap to view the answer
What is 1 horsepower in watts?
Tap to view the answer
1 mechanical horsepower = 745.699872 W. Metric horsepower is slightly different, at 735.49875 W — about 1.4% lower. Check which definition your source uses before comparing engine ratings.
What is the difference between kW and kWh?
Tap to view the answer
What is the difference between kW and kWh?
Tap to view the answer
kW is power — the rate energy is used or produced. kWh is energy — power multiplied by time. A 1 kW appliance running for 1 hour uses 1 kWh of energy.
How do I convert BTU/h to watts?
Tap to view the answer
How do I convert BTU/h to watts?
Tap to view the answer
Multiply BTU/h by 0.293071. Example: 12,000 BTU/h × 0.293071 = 3,516.85 W. This conversion is common for HVAC and air-conditioner power ratings.
How accurate is this power converter?
Tap to view the answer
How accurate is this power converter?
Tap to view the answer
It uses exact, internationally defined conversion factors (e.g. 1 HP = 745.699872 W, 1 BTU/h = 0.293071 W), so results are precise to the number of decimal places you choose. For precision engineering work, verify figures against certified references.
Need more help? Contact support or email globalcalqulate@gmail.com
We typically reply within 24–48 hours.