Convert watts to kilowatts, megawatts, milliwatts, horsepower, BTU/h, or cal/s and see the equivalent power value instantly online.

Watts to Other Power Units Converter

Enter a watt value and choose the output unit

Watts Conversion Formula

The following formula is used to convert watts into another power unit.

Converted Value = W × CF

Where:

  • W is the power in watts
  • CF is the conversion factor for the selected unit
  • Converted Value is the equivalent power in the new unit

To convert from watts to another power unit, multiply the watt value by the conversion factor for that unit.

What is a Watt?

The watt (W) is the standard SI unit of power. It measures the rate at which energy is transferred or used, and one watt is equal to one joule per second. While watts are commonly used for electrical devices and appliances, many industries also express power in units such as kilowatts, megawatts, horsepower, BTU per hour, and calories per second.

How to Convert Watts to Other Power Units?

The following steps outline how to convert watts into another unit of power.

  1. First, determine the power in watts (W).
  2. Next, choose the output unit you want to convert to.
  3. Find the conversion factor for that target unit.
  4. Multiply the watt value by the conversion factor to calculate the converted result.
  5. Check your answer with the calculator above.

Common Watts Conversion Factors

  • 1 W = 1 W
  • 1 W = 0.001 kW
  • 1 W = 0.000001 MW
  • 1 W = 1000 mW
  • 1 W ≈ 0.0013410221 hp
  • 1 W ≈ 3.412141633 BTU/h
  • 1 W ≈ 0.239005736 cal/s

Watts Conversion Table

The table below shows example conversions for a power level of 1000 watts.

Target Unit Conversion Factor (per 1 W) 1000 W in That Unit
Watts (W) 1 1000 W
Kilowatts (kW) 0.001 1 kW
Megawatts (MW) 0.000001 0.001 MW
Milliwatts (mW) 1000 1,000,000 mW
Horsepower (hp) 0.0013410221 1.341 hp
BTU per hour (BTU/h) 3.412141633 3412.1416 BTU/h
Calories per second (cal/s) 0.239005736 239.0057 cal/s

Example Problem

Use the following variables as an example problem to test your knowledge.

Power in Watts (W) = 750

Target Unit = Horsepower (hp)

Horsepower = 750 × 0.0013410221 = 1.0058 hp