Convert Horsepower to Kilowatts
Instantly convert Horsepower (hp) to Kilowatts (kW) with our free online calculator.
Formula: hp to kW — multiply by 0.7457
Reference Table
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 1 | 0.7457 |
| 5 | 3.7285 |
| 10 | 7.457 |
| 25 | 18.6425 |
| 50 | 37.285 |
| 100 | 74.57 |
How to Convert Horsepower to Kilowatts
Formula
To convert Horsepower (hp) to Kilowatts (kW): multiply by 0.7457
Step-by-Step
- Start with your value in Horsepower (hp).
- Multiply by 0.7457 to perform the conversion.
- The result is your value expressed in Kilowatts (kW).
Conversion Factor
1 hp = 0.7457 kW
Reverse Factor
1 kW = 1.34102 hp
Worked Example
Convert 25 Horsepower to Kilowatts: 25 hp = 18.6425 kW
About Horsepower (hp)
An imperial unit of power equal to approximately 745.7 watts, originally defined by James Watt to compare steam-engine output to draft horses pulling coal. Horsepower remains the dominant US unit for car engines, outboard motors, tractors, lawn equipment, and HVAC blowers. A typical sedan has 150–300 hp; a Tesla Model S Plaid has ~1,000 hp. Metric horsepower (PS, CV) is slightly different at 735.5 W — a detail that matters when comparing US-spec vs European-spec engine ratings.
About Kilowatt (kW)
A metric unit of power equal to 1,000 watts. Kilowatts are the practical unit for larger appliances and systems — electric kettles (1.5–3 kW), car EV motors (150–400 kW peak), home solar systems (5–10 kW), data centers, and industrial machinery. Utility-scale electricity is priced in kWh (kilowatt-hours), so the kilowatt is the natural rate unit for billing. Converting kW to horsepower (×1.341) is routine for internationally traded engines and motors.
Quick Facts
- 1 Horsepower equals 0.7457 Kilowatts
- 1 Kilowatt equals 1.34102 Horsepower
- Horsepower is a unit of power
- Kilowatt is a unit of power
- This conversion is commonly used in electrical systems, automotive performance, and HVAC sizing
- The Horsepower belongs to the imperial system
- The Kilowatt belongs to the metric system
Common Horsepower to Kilowatt Conversions
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 0.01 | 0.007457 |
| 0.1 | 0.07457 |
| 0.25 | 0.186425 |
| 0.5 | 0.37285 |
| 1 | 0.7457 |
| 2 | 1.4914 |
| 3 | 2.2371 |
| 5 | 3.7285 |
| 10 | 7.457 |
| 15 | 11.1855 |
| 20 | 14.914 |
| 25 | 18.6425 |
| 50 | 37.285 |
| 75 | 55.9275 |
| 100 | 74.57 |
| 250 | 186.425 |
| 500 | 372.85 |
| 1000 | 745.7 |
| 5000 | 3728.5 |
| 10000 | 7457 |
Understanding Horsepower
The Horsepower (symbol: hp) is a unit of power. An imperial unit of power equal to approximately 745.7 watts, originally defined by James Watt to compare steam-engine output to draft horses pulling coal. Horsepower remains the dominant US unit for car engines, outboard motors, tractors, lawn equipment, and HVAC blowers. A typical sedan has 150–300 hp; a Tesla Model S Plaid has ~1,000 hp. Metric horsepower (PS, CV) is slightly different at 735.5 W — a detail that matters when comparing US-spec vs European-spec engine ratings.
It belongs to the imperial measurement system.
Horsepower are commonly used in electrical systems, automotive performance, and HVAC sizing.
Understanding Kilowatts
The Kilowatt (symbol: kW) is a unit of power. A metric unit of power equal to 1,000 watts. Kilowatts are the practical unit for larger appliances and systems — electric kettles (1.5–3 kW), car EV motors (150–400 kW peak), home solar systems (5–10 kW), data centers, and industrial machinery. Utility-scale electricity is priced in kWh (kilowatt-hours), so the kilowatt is the natural rate unit for billing. Converting kW to horsepower (×1.341) is routine for internationally traded engines and motors.
It belongs to the metric measurement system.
Kilowatts are commonly used in electrical systems, automotive performance, and HVAC sizing.
Why Convert Horsepower to Kilowatts?
Power conversions between Horsepower and Kilowatts are needed in electrical engineering, automotive performance comparison, and HVAC system design. Motor ratings, generator capacities, and appliance specifications are published in different power units depending on the manufacturer and region.
Frequently Asked Questions
How do I convert Horsepower to Kilowatts?
An imperial unit of power equal to approximately 745. To convert Horsepower to Kilowatts, multiply by 0.7457. For example, 25 hp equals 18.6425 kW.
How many Kilowatts are in 1 Horsepower?
There are 0.7457 Kilowatts in 1 Horsepower.
How many Horsepower are in 1 Kilowatt?
There are 1.34102 Horsepower in 1 Kilowatt.
What is the formula for Horsepower to Kilowatt conversion?
The formula is: multiply by 0.7457. This means 1 hp = 0.7457 kW.
Is a Horsepower bigger than a Kilowatt?
Yes. One Horsepower is larger than one Kilowatt because 1 hp equals 0.7457 kW, which is less than 1.
When do you need to convert between Horsepower and Kilowatts?
A metric unit of power equal to 1,000 watts. Horsepower and Kilowatt are both power units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.