power unit converter
Convert Power units, compare 16 unit definitions and explore formulas, examples and common questions.
Power converter
Popular conversions
Complete unit directory16 units
Choose a source unit to see every available target unit. Each directory has a stable address.
- Boiler horsepowerbhp
- British thermal units per hourBTU/h
- British thermal units per secondBTU/s
- Calories per hourcal/h
- Electrical horsepowerehp
- Horsepowerhp
- Joules per secondJ/s
- Kilocalories per hourkcal/h
- KilowattskW
- Metric horsepowermhp
- MegawattsMW
- WattsW
- Foot-pounds per second
- Foot-pounds per minute
- Milliwatts
- Tons of refrigeration
No matching units. Try a name or symbol.
How to use this calculator
- Enter the value you want to convert.
- Choose the source and target units, then adjust the display precision if needed.
- Read the result. Select Convert to open a page for this value, or use the table below.
Definitions and assumptions
Power is energy transferred per unit time, expressed here relative to watts. Mechanical, metric, electrical and boiler horsepower have different definitions and are separate choices.
Frequently asked questions
Which Power units are supported?
The directory lists 16 units, including symbols and availability. Choose any source unit to browse its target units.
how to convert hp to kW?
The calculator converts the input to the category's reference unit, then divides by the target unit's factor. 1 × 0.745699871582 ≈ 0.7457 Kilowatts. Use the source and target factors shown in the formula. The worked example uses the value on this page, and the table provides other common values.
Why do horsepower results differ?
Mechanical horsepower, metric horsepower, electrical horsepower and boiler horsepower use different definitions. Select the definition matching your source document.
Why is the displayed result rounded?
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
What input range can I use?
This calculator accepts non-negative values up to 1 trillion, with up to 8 decimal places. It does not calculate signed vectors or calendar date intervals.
Why is a unit unavailable?
A conversion is unavailable when a verified unit definition or a current exchange-rate value has not been configured. The tool does not invent a coefficient.
Sources and methodology
Methods and sources · Content revised
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