Convert 1 HP to kW

Power Conversion Formula:

\[ P_{kW} = 1 \times 0.746 \]

Power (kW):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is HP to kW Conversion?

Definition: This calculator converts horsepower (HP) to kilowatts (kW), the standard unit of power in the International System of Units.

Purpose: It helps engineers, mechanics, and technicians convert between these common power measurement units.

2. How Does the Conversion Work?

The calculator uses the formula:

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

Where:

\( P_{kW} \) — Power in kilowatts
\( HP \) — Power in horsepower
0.746 — Conversion factor (1 HP = 0.746 kW)

Explanation: One mechanical horsepower is equivalent to approximately 746 watts (0.746 kilowatts).

3. Importance of Power Unit Conversion

Details: Proper unit conversion ensures accurate specifications, equipment compatibility, and compliance with international standards.

4. Using the Calculator

Tips: Enter the horsepower value (default is 1 HP) to get the equivalent power in kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.746?
A: This comes from the definition of 1 HP = 550 ft-lb/s = 745.7 watts, typically rounded to 746 watts (0.746 kW).

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

Q3: How precise is this conversion?
A: The 0.746 factor is precise for most applications, though the exact value is 0.745699872 kW.

Q4: When would I need this conversion?
A: When working with international specifications, electrical systems, or comparing engine/motor performance.

Q5: Can I convert kW back to HP?
A: Yes, divide kW by 0.746 (or multiply by 1.341) to get HP.