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How To Convert Power Units Calculator

Power is the rate of doing work, and it is measured in watts, horsepower and BTU per hour depending on the field. A converter routes every value through the watt so the factors stay exact.

Converted value

1.34102209

Value in watts
1,000

Values update as you type. This calculator covers the single scenario its formula assumes — see Common Mistakes for what it leaves out.

The formula this calculator uses

Result = value x from-factor / to-factor

value
Amount you start with
from
Size of the source unit in watts
to
Size of the target unit in watts

How to check the result by hand

  1. 1

    Enter the amount

    Type the power value you want to convert.

  2. 2

    Pick the source unit

    Choose the unit the value is currently in, such as kilowatts.

  3. 3

    Pick the target unit

    Choose the unit you want, such as mechanical horsepower.

  4. 4

    Multiply by the source factor

    The value is expressed in watts using the source unit's size.

  5. 5

    Divide by the target factor

    Converting from the base watt into the target unit gives the answer.

For worked examples, common mistakes and the limits of this formula, read the full How To Convert Power Units page.