FORMULA
How to convert
kW = hp × 0.745699871582Example: 10 hp = 7.45699872 kW.
HP → KW
Mechanical Horsepower to Kilowatts
Convert mechanical horsepower to kilowatts with an exact, deterministic calculation.
LIVE CONVERSIONDECIMAL ENGINE EXACT_
1 hp = 0.745699871582 kW
MULTI-CONVERT
QUICK ANSWER
1 Mechanical horsepower
0.745699871582 kW
REFERENCE TABLE
Mechanical horsepower to Kilowatt
| mechanical horsepower | kilowatts |
|---|---|
| 1 hp | 0.74569987 kW |
| 5 hp | 3.72849936 kW |
| 10 hp | 7.45699872 kW |
| 25 hp | 18.64249679 kW |
| 50 hp | 37.28499358 kW |
| 100 hp | 74.56998716 kW |
ABOUT THIS CONVERSION
Convert mechanical horsepower to kilowatts
This page converts mechanical horsepower (hp) to kilowatts (kW). Convertor4U first interprets the input using Mechanical horsepower's definition, then expresses the same quantity in Kilowatt. The result is calculated from the stored factor and offset definitions, not from a rounded lookup table.
Real-world example
For comparing an appliance, motor, engine, solar array, or heating system, an input of 5 hp converts to 3.72849936 kW. Keep extra digits while calculating, then round only the final value to the precision the task actually needs.
Rounding and precision
Nameplate power is often a rated or nominal value, so extra converted digits add no certainty. For energy planning, retain sufficient precision until power is multiplied by operating time and efficiency.
Regional context
Mechanical horsepower and metric horsepower are different units; both are included and clearly labeled. Vehicle markets may advertise hp, PS, or kW depending on country and convention.
Common mistake
Do not confuse kW with kWh: power is a rate and energy also depends on elapsed time.
Editorial method
Definitions and sources are listed below. Calculations retain more precision than the default display and round only for presentation.
USEFUL ANSWERS
hp to kW FAQs
How do I convert mechanical horsepower to kilowatts?
Enter the hp value in the calculator. It applies the stored factor and offset definitions and returns the equivalent in kW; the formula and common-value table are shown on this page.
Is the hp to kW conversion exact?
Defined measurement relationships are calculated with decimal arithmetic from stored standards. The displayed answer may be rounded for readability. Currency results instead depend on the dated reference rate shown.
How many decimal places should I keep?
Nameplate power is often a rated or nominal value, so extra converted digits add no certainty. For energy planning, retain sufficient precision until power is multiplied by operating time and efficiency.
What should I check before using the result?
Do not confuse kW with kWh: power is a rate and energy also depends on elapsed time.
FROM UNIT
Mechanical horsepower
Mechanical horsepower is defined as 550 foot-pounds per second, about 745.7 watts. It measures the rate of energy transfer rather than an accumulated energy amount.
NIST Guide to the SI, SP 811 ↗Definition verified 14 August 2026TO UNIT
Kilowatt
One kilowatt (kW) equals 1000 watt units (W) in the converter's reference scale. It measures the rate of energy transfer rather than an accumulated energy amount.
NIST Guide to the SI, SP 811 ↗Definition verified 14 August 2026Content reviewed by Convertor4U Editorial Team · 16 August 2026 · Report an error on this page