Power Converter
Power Converter translates W, kW, MW, and hp through watts. Horsepower is set to 745.699872 W, corresponding to mechanical horsepower; metric, electrical, boiler, and other horsepower definitions differ. Power is an instantaneous or averaged rate and does not by itself give energy consumption.
Runs locally — files stay on your deviceHow many watts are in one horsepower here?
745.699872 watts, using mechanical horsepower.
Power measures energy transferred per unit time
One watt equals one joule per second. Kilo and mega apply decimal factors of 1000 and 1,000,000, while the page maps mechanical horsepower to 745.699872 W.
How it works
The source power is converted to watts and then divided by the destination factor.
Key concepts
Horsepower is not one universal unit
This page uses mechanical horsepower.
Energy requires time
A 1 kW device running one hour uses 1 kWh before losses or duty-cycle adjustments.
When to use it
- Compare motor ratings.
- Translate kW and mechanical hp.
- Scale watts to megawatts.
When not to use it
- Do not calculate energy without operating time.
- Do not assume every horsepower label uses the mechanical definition.
- Do not infer electrical input from mechanical output without efficiency.
Worked examples
Mechanical horsepower
- Input
1 hp- Expected output
745.699872 W
The selected hp definition is applied.
Kilowatts
- Input
2.5 kW- Expected output
2500 W
Kilo means one thousand.
Megawatt
- Input
1 MW- Expected output
1000 kW
Both prefixes are decimal.
Common mistakes
Using metric horsepower
Metric hp has a different factor. Correction: Choose a tool supporting the required hp standard.
Calling kW energy
It is a rate. Correction: Use kWh for energy over time.
Ignoring efficiency
Input and output power can differ. Correction: Apply an efficiency model separately.
Best practices
- Label the horsepower definition.
- Distinguish input, output, peak, and continuous ratings.
- Add time and efficiency for energy estimates.
Related operations and differences
Area Converter
Choose Area Converter when you need to convert common metric and imperial areas.; use Power Converter specifically for convert.
Data Storage Converter
Choose Data Storage Converter when you need to convert decimal and binary storage units.; use Power Converter specifically for convert.
Energy Converter
Choose Energy Converter when you need to convert joules, calories and watt-hours.; use Power Converter specifically for convert.
Fuel Economy Converter
Choose Fuel Economy Converter when you need to convert MPG, L/100 km and km/L.; use Power Converter specifically for convert.
Length Converter
Choose Length Converter when you need to convert metric and imperial length units.; use Power Converter specifically for convert.
Pressure Converter
Choose Pressure Converter when you need to convert pascals, bar, PSI and atmospheres.; use Power Converter specifically for convert.
Limitations and privacy
- Mechanical horsepower only.
- No apparent power, reactive power, torque, efficiency, or energy calculation.
- No peak-versus-average interpretation.
Values are converted locally in this browser and are not uploaded.
Frequently asked questions
Which horsepower is used?
Mechanical horsepower.
How many watts are in 1 kW?
1000.
Is kW the same as kWh?
No.
Can this calculate energy use?
Not without duration.