Convert hp to kW

The hp to kW converter helps you quickly convert power values from horsepower (hp) to kilowatts (kW). This conversion is commonly used when comparing engines, electric motors, generators, air conditioning systems, industrial machines, pumps, compressors, and vehicle specifications.

Horsepower is often used to describe the output of engines and mechanical equipment, while kilowatts are widely used in the metric system and electrical power ratings. Converting hp to kW makes it easier to compare mechanical power and electrical power using a consistent unit.

What Is Horsepower?

Horsepower (symbol: hp) is a unit of power originally developed to compare the work output of engines with the power of draft horses. Today, horsepower is commonly used in automotive, machinery, and engine specifications. It helps describe how much power an engine, motor, or mechanical system can produce.

There are different types of horsepower, such as mechanical horsepower and metric horsepower. In many general conversion tools, mechanical horsepower is commonly used unless otherwise stated.

What Is a Kilowatt?

A kilowatt (symbol: kW) is a metric unit of power equal to 1,000 watts. Kilowatts are commonly used for electric motors, appliances, generators, solar systems, HVAC systems, and industrial equipment. Because kW belongs to the International System of Units, it is widely used in technical and engineering contexts.

When You May Need to Convert hp to kW

• Comparing car, motorcycle, or engine power ratings
• Checking electric motor specifications
• Understanding generator or pump power capacity
• Reading industrial equipment datasheets
• Converting mechanical power ratings into metric power units
• Comparing HVAC, compressor, or machinery performance

hp to kW Formula

1 hp = 0.7457 kW
kW = hp × 0.7457

To convert horsepower to kilowatts, multiply the horsepower value by 0.7457.

Example: Convert 100 hp to kW:
100 × 0.7457 = 74.57 kW

Common hp to kW Conversion Table

Why Convert hp to kW?

Converting hp to kW is useful because different industries and countries may use different units to describe power. For example, a vehicle may advertise engine output in horsepower, while an electric motor or industrial machine may list power in kilowatts.

Using the same unit makes comparison easier. If you are comparing a gasoline engine, electric motor, generator, or machine rating, converting hp to kW helps you understand the approximate power output in a metric-based format.

Important Note About Horsepower Standards

Horsepower can have different definitions depending on the context. Mechanical horsepower is commonly used in the United States and equals approximately 0.7457 kW. Metric horsepower, sometimes used in automotive specifications, is slightly different and equals approximately 0.7355 kW.

For general use, this page uses mechanical horsepower. If you are working with official vehicle documents, engineering datasheets, or regulatory specifications, always confirm which horsepower standard is being used.

Common Real-World Examples

A 10 hp motor is approximately 7.457 kW, while a 100 hp engine is approximately 74.57 kW. In practical terms, this helps when comparing machinery output, selecting motor capacity, estimating equipment performance, or reading international product specifications.

For electric motors and industrial machines, kW is often more useful because it connects directly with electrical power usage, energy planning, and system capacity calculations.

Related Power Conversion Pages

• kW to hp
• Weight and Mass Converter

Frequently Asked Questions

How many kW are in 1 hp?
1 mechanical horsepower is equal to approximately 0.7457 kilowatts.

What is the formula for converting hp to kW?
Multiply the horsepower value by 0.7457 to get the value in kilowatts.

What is 100 hp in kW?
100 hp is equal to approximately 74.57 kW.

Is horsepower the same as kilowatt?
No. Both measure power, but horsepower is commonly used for engines and mechanical equipment, while kilowatts are part of the metric system and are widely used for electrical and technical power ratings.

Why do vehicles often use hp while motors use kW?
Horsepower is traditional in automotive and engine marketing, while kW is more common in engineering, electrical systems, and metric-based specifications.

Are hp to kW conversions always exact?
The conversion is exact only when the horsepower standard is defined. This page uses mechanical horsepower, where 1 hp is approximately 0.7457 kW.

Quick Power Reference

• 1 hp ≈ 0.75 kW
• 5 hp ≈ 3.73 kW
• 10 hp ≈ 7.46 kW
• 50 hp ≈ 37.29 kW
• 100 hp ≈ 74.57 kW