Electric Power Calculator
Electrical power in watts = voltage × current.
Open toolConvert a quantity using the listed fixed unit factors. Mechanical and metric horsepower are labelled separately.
Enter the inputs, then select Convert units.
Result will appear here
Convert a quantity using the listed fixed unit factors.
Mechanical and metric horsepower are labelled separately. Finite real numbers only. Display uses up to 12 significant digits; binary floating-point arithmetic can introduce rounding.
Follow the labelled inputs.
Replace the example with quantity. The field labels specify the expected format and units.
Set from unit, to unit. Mechanical and metric horsepower are labelled separately.
Select Convert units. Review the converted quantity and its destination unit, then copy it or download the result text.
Enter the stated quantity and its source unit. The output retains the destination-unit label, so you can compare it with the original specification.

Convert the readings to the same unit before comparing them. Mechanical and metric horsepower are labelled separately.

Copy the quantity with its unit or download the text. Convert a quantity using the listed fixed unit factors.

Read the units and assumptions with the output.
Convert a quantity using the listed fixed unit factors.
Mechanical and metric horsepower are labelled separately. Finite real numbers only. Display uses up to 12 significant digits; binary floating-point arithmetic can introduce rounding.

Check the stated scope before you run it.
Mechanical and metric horsepower are labelled separately. Finite real numbers only. Display uses up to 12 significant digits; binary floating-point arithmetic can introduce rounding.
The input stays in this browser. Copy result and Download save the same displayed text.

Choose another tool for your next calculation, conversion, or text task.
Convert a quantity using the listed fixed unit factors.
Open toolConvert a quantity using the listed fixed unit factors.
Open toolConvert a quantity using the listed fixed unit factors.
Open toolConvert a quantity using the listed fixed unit factors.
Open toolAnswers about using Power Converter and understanding its results.
Mechanical and metric horsepower are labelled separately. Finite real numbers only. Display uses up to 12 significant digits; binary floating-point arithmetic can introduce rounding.
Yes. Copy result copies the displayed text, and Download saves the same result as a text file. Calculations run in your browser without an account.
Check the converted quantity and its destination unit, then copy or download it.