Power Converter
Power conversion workspace
Enter a decimal, fraction or quick calculation — for example 12.5, 3/8 or (12*4)+6.5.
Batch conversionconvert up to 100 values at once
No values yet.
Compare all power units
One input, every supported equivalent. Select any row as the main target.
| Unit | Equivalent | Target action |
|---|---|---|
| Watts W | 1 | SourceSource |
| Kilowatts kW | 1E-3 | TargetSelected |
| Horsepower (mechanical) hp | 1.34E-3 | |
| Horsepower (metric) PS | 1.36E-3 | |
| BTU/hour (International Table) BTU/h | 3.41 |
Power is the rate at which energy is transferred.
Sourced factorsFormula
value in target = value × source factor / target factor
Calculations use the central unit catalog and preserve precision until the result is formatted.
Common conversions
| Input | From | To | Result |
|---|---|---|---|
| 1 | Kilowatts | Watts | 1,000 |
Frequently asked questions
Are mechanical and metric horsepower the same?
No. One mechanical horsepower is 745.6998715822702 watts, while one metric horsepower (PS) is 735.49875 watts, so the variant must be named.
Are the results rounded?
The calculation retains full JavaScript number precision; the precision control only formats the displayed result.
Accuracy & transparency
Sources & methodology
Calculations keep full numeric precision until display formatting. These references describe the definitions, variants or factors used; links do not imply affiliation.
SI definitions and published coefficients for selected non-SI units.
Reference factors and named variants for commonly used units, including US liquid cooking measures and British stone.
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