Horsepower to kW Formula

Power Conversion Formula:

\[ P_{kW} = HP \times 0.746 \]

Power (kW):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Horsepower to kW Conversion?

Definition: This calculator converts power measurements from horsepower (HP) to kilowatts (kW).

Purpose: It helps engineers, mechanics, and technicians work with power units across different measurement systems.

2. How Does the Conversion Work?

The conversion uses the formula:

\[ P_{kW} = HP \times 0.746 \]

Where:

\( P_{kW} \) — Power in kilowatts (kW)
\( HP \) — Power in horsepower

Explanation: 1 mechanical horsepower is equal to approximately 0.746 kilowatts.

3. Importance of Power Unit Conversion

Details: Converting between horsepower and kW is essential when working with international specifications, electrical systems, or comparing engine performance.

4. Using the Calculator

Tips: Simply enter the horsepower value and the calculator will automatically compute the equivalent power in kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: Why 0.746 specifically?
A: This is the exact conversion factor between mechanical horsepower (550 ft-lbf/s) and kilowatts (1000 watts).

Q2: Does this work for all types of horsepower?
A: This applies to mechanical horsepower. Metric horsepower uses 0.7355 kW/HP.

Q3: When would I need this conversion?
A: When comparing engine specs, sizing electrical equipment, or working with international standards.

Q4: How precise is this conversion?
A: The 0.746 factor is precise to three decimal places for mechanical horsepower.

Q5: Can I convert kW back to HP?
A: Yes, divide kW by 0.746 to get horsepower.