Power Converter

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Convert any power unit quickly and accurately. Whether you need to convert watts to kilowatts, horsepower to Btu/h, or any other power units, our tool gives you instant results, clear explanations, and helpful tables – all in one place.

How to Use the Power Converter

  1. Enter the value you want to convert.
  2. Select the original unit (From) and the target unit (To).
  3. See the result instantly, along with a human-readable explanation.

This tool supports all major power units: watts, kilowatts, megawatts, horsepower, Btu/hour, and more.

Popular Power Conversions

From To Formula
Watts (W) Kilowatts (kW) W ÷ 1000
Kilowatts (kW) Watts (W) kW × 1000
Horsepower (hp) Watts (W) hp × 745.7
Watts (W) Horsepower (hp) W ÷ 745.7
Kilowatts (kW) Horsepower (hp) kW × 1.34102
Horsepower (hp) Kilowatts (kW) hp ÷ 1.34102
Btu/hour Watts (W) Btu/h × 0.293071
Watts (W) Btu/hour W ÷ 0.293071

Power Units Explained

What is a Watt?

The watt (W) is the SI unit of power, equivalent to one joule per second. It is used to quantify the rate of energy transfer.

What is a Kilowatt?

A kilowatt (kW) is equal to 1,000 watts. This unit is commonly used to express the power of engines, tools, and machines.

What is Horsepower?

Horsepower (hp) is a unit of power, most commonly used to refer to the power of engines or motors. One mechanical horsepower is equal to about 745.7 watts.

What is Btu/hour?

Btu (British thermal unit) per hour is a unit of power used in the power, steam generation, heating, and air conditioning industries. One Btu/h is approximately 0.293 watts.

Common Power Unit Converters

FAQ

  • What unit of power is commonly used for air conditioners?

    Air conditioners often use Btu/hour to express their cooling capacity, especially in the United States.

  • Is horsepower the same in all countries?

    No, horsepower can differ by region. For example, metric horsepower (used in Europe) is slightly different from mechanical horsepower (used in the US).

  • Can watts be negative?

    In electrical systems, negative watts can indicate power is being returned or generated, such as during regenerative braking in electric vehicles.

  • How many watts are in a megawatt?

    One megawatt equals 1,000,000 watts.

  • What’s the difference between apparent power and real power?

    Real power (watts) measures actual energy consumed, while apparent power (volt-amperes) includes both real and reactive components in AC systems.