How it works
One kilowatt is 1,000 watts. Mechanical horsepower is approximately 745.699871582 watts. Conversion does not include efficiency losses.
Result = value × source factor / target factor
Worked example
Show example inputs and result
Value: 100 · From unit: W · To unit: kW.
- Converted value
- 0.1 kW
Questions and answers
Is mechanical hp the same as metric horsepower?
No. This tool uses mechanical horsepower, not metric horsepower (PS or cv). It also does not convert kilowatt-hours, which measure energy.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Conversion reference: NIST SI Guide
Method reviewed: October 8, 2026 · Methods & accuracy