Power Converter - Calculate Energy Units

Instantly convert between watts, kilowatts, horsepower, BTUs/hour and other power units with our AI-powered calculator.

6
Power Units
Instant
Results
Precise
Calculations

Power Unit Converter

Convert Power Units

Conversion Result
74.57 kW
100 hp = 74570 Watts = 74.57 kW

Power Converter – Convert Between Watts, Kilowatts, Horsepower & More

Use this free Power Unit Converter to instantly convert between watts, kilowatts, horsepower, BTUs/hour, and other power units. Ideal for engineers, HVAC professionals, students, and DIY enthusiasts.

🔁 Supported Power Units

You can convert between these power units:

Watts (W)
Standard SI unit of power. 1 watt = 1 joule per second.
Kilowatts (kW)
1,000 watts. Common unit for electrical power and engines.
Megawatts (MW)
1,000,000 watts. Used for high power generation like power plants.
Horsepower (hp)
Common in engines and motors. 1 hp ≈ 745.7 watts.
BTUs/hour (BTU/h)
Used in heating and air conditioning. 1 BTU/h ≈ 0.29307107 watts.
Calories/second (cal/s)
Used in thermodynamics. 1 cal/s = 4.1868 watts.

💡 Example Conversions

1 horsepower
= 745.7 watts
3 kilowatts
= 4.023 horsepower
10,000 BTU/h
≈ 2.93 kW
500 watts
≈ 119.4 cal/s

✅ Why Use This Power Converter?

Instant, Accurate Conversions

Get precise results immediately with our AI-powered calculation engine.

Wide Range of Units

Convert between 6 different power units for all your technical needs.

Mobile-Optimized

Use our converter on any device - desktop, tablet, or smartphone.

Privacy Focused

No data collection, ads, or login required. Your calculations stay private.

Whether you're an engineer working on energy systems, a student studying thermodynamics, or a DIY enthusiast calculating power requirements, our Power Converter provides reliable, instant conversions for all your needs.

Convert Watts, Horsepower and BTU Without the Math

Power figures are quoted in whatever unit the industry prefers: watts for electronics, horsepower for engines, BTU per hour for heating and cooling. This converter switches between six power units — watts, kilowatts, megawatts, horsepower, BTUs per hour and calories per second — so a specification written for one field makes sense in another. The page also shows the standard relationships (1 hp ≈ 745.7 W, 1 BTU/h ≈ 0.293 W) and worked examples like 100 hp = 74.57 kW, which makes it useful for learning as well as calculating.

How to Use It

  1. Enter the power value.
  2. Choose the from and to units.
  3. Read the precise converted result instantly.

Engineers use it for energy systems, HVAC professionals for heating and cooling loads, students for thermodynamics, and DIY enthusiasts for sizing equipment and power supplies. Free, mobile-friendly and private — no sign-up.

Frequently Asked Questions

Which power units does it support?

Six: watts (W), kilowatts (kW), megawatts (MW), horsepower (hp), BTUs per hour (BTU/h) and calories per second (cal/s).

How many watts are in one horsepower?

1 hp ≈ 745.7 watts — so a 100 hp engine is 74.57 kW. The converter does this and every other combination instantly.

Who is it for?

Engineers, HVAC professionals, students and DIY users comparing motors, appliances, generators and climate equipment.

Is it free?

Yes — no login, no sign-up and no data collection.