Power Converter – Watts, kW, HP, BTU/h & 20+ Units
Convert watts, kilowatts, horsepower, BTU/h & 20+ power units instantly. Used by electrical engineers, HVAC pros & mechanics. Free, no sign-up, precise to 15 decimals.
Updated for 2026
By the GlobalCalqulate team, founded by Pavan Kusunuri · About our editorial standards
Frequently Asked Questions
Clear answers to common questions to help you use this calculator confidently.
What is power and how do I convert power units?
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What is power and how do I convert power units?
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Power is the rate of energy transfer. SI unit is watts (W). 1 watt = 1 joule per second. Common conversions: 1 kW = 1,000 watts, 1 horsepower ≈ 746 watts. Use converter to instantly switch between units.
How many watts is 1 horsepower?
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How many watts is 1 horsepower?
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1 mechanical horsepower = 745.7 watts. 1 electrical horsepower = 746 watts. Slight difference due to measurement standards. Use converter for precise conversions.
What does BTU/hour mean?
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What does BTU/hour mean?
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BTU/hour is thermal power unit (British Thermal Units per hour). Used for HVAC systems, heating/cooling capacity. 1 kW ≈ 3,412 BTU/hour. Common for US air conditioning ratings.
How many kilowatts in 1 megawatt?
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How many kilowatts in 1 megawatt?
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1 megawatt (MW) = 1,000 kilowatts (kW). Used for large power plants, wind turbines, solar farms. 1 MW powers approximately 750-1,000 homes.
Can I use this for renewable energy calculations?
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Can I use this for renewable energy calculations?
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Yes! Perfect for solar panels (kW rating), wind turbines (MW capacity), and battery storage (kWh to watts). Convert between all common renewable energy power units instantly.
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