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Md Jony Islam Author
Md Jony Islam
CalculatorToolsProjectExpert
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Małgorzata Koperska, MD Steven Wooding
Last updated: November 17, 2025

KW to HP Calculator | Convert Kilowatts to Horsepower Instantly

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Convert KW to HP Calculator

Easily convert kilowatts (kW) to horsepower (HP) using this fast and accurate online calculator. Works for both mechanical and electrical horsepower conversions.

mechanical horsepower conversion

A kW to HP Converter operates by a simple ratio of electrical to mechanical power. For example of typing into the calculator a figure in kilowatts, it multiplies it by 1.341 to determine the equivalent horsepower output.

electric motor efficiency calculator

The kW to HP Calculator is used to easily convert kilowatts (kW) which is a unit of real power into horsepower (HP) which is a unit of mechanical output power. It is commonly employed to determine the size of motors, engines and machinery. The simple formula of conversion is: 1 kW = 134102 HP (mechanical) or 1 kW = 1.35962 HP (metric). Just make the input in the kilowatts and the calculator will compute the horsepower that will be used in proper comparison of equipment ratings. This tool can be used by engineers, electricians and mechanics and students to assess the performance of the motor, generator output or load efficiency. This calculator is accurate and reliable in converting power whether in electric use, in a car or an industry. It is time-saving, manualities are removed, and it works with single-phase and three-phase.

Work, Installation, Input to Output Summary

This aids the engineers in aligning the ratings of the motors or generator capacities during installation of equipment or specification checks. The conversion also guarantees that drives, pumps, and engines are sized correctly to perform and be efficient as desired. The calculator gives quick and dependable output (HP) from input (kW) to fulfill real world electrical and mechanical power requirements.

Testing and Final Adjustments

To ensure that your values of kW-to-HP are accurate, use the standard power rating tables after the conversion. In the case of motor or generator applications, ensure that the converted horsepower is compared with the manufacturer's nameplate information. Compensate system losses, voltage, or frequency when required, particularly when operating variable-speed drives. You should always check whether the conversion is of mechanical HP (1.34102) or metric HP (1.35962) according to your region. In case of electrical set-ups, input kW values must be verified on calibrated meters to obtain valid values. Record all values and ensure that they are consistent when under load conditions and re-test after some period to ensure power efficiency and system balance.

Frequently Asked Questions - Convert KW to HP Calculator:

How many HP are in 1 kW?

1 kilowatt equals 1.34102 mechanical horsepower or 1.35962 metric horsepower.

How do you convert kW to HP?

Multiply kilowatts by 1.341 to get mechanical horsepower.

What is the formula for kW to HP?

Horsepower = Kilowatts × 1.34102 (mechanical HP).

Is 1 kW equal to 1 HP?

No, 1 kW equals about 1.341 horsepower, meaning HP is slightly larger.

What’s the difference between mechanical and metric HP?

Mechanical HP = 745.7 W, Metric HP = 735.5 W, a small regional variation.

How many kW is 10 HP?

10 horsepower equals about 7.457 kilowatts.

Can this be used for motor power ratings?

Yes, it’s ideal for converting motor, pump, and engine power ratings.

Is kW or HP used in electrical systems?

kW is standard in electrical systems; HP is common in mechanical applications.

What’s the conversion for metric HP?

Multiply kilowatts by 1.35962 to get metric horsepower.

Why convert kW to HP?

It helps compare electrical and mechanical power ratings in engineering and automotive fields.

Md Jony Islam

Md Jony Islam

Calculator Tools Project

Founder of Earthbondhon.com

a free online tools website designed to make everyday and engineering-related calculations easier for students, professionals, and hobbyists. The site offers a wide range of basic calculators across key categories, including Electrical Calculators, Electronic Calculators, and Time & Date Calculators.