3 horsepower equals approximately 2.237 kw.
To convert horsepower (hp) to kilowatts (kw), multiply the hp value by 0.7457. This conversion factor is based on the relationship where 1 hp equals 0.7457 kw, used in mechanical and electrical calculations to switch between power measurement systems.
Introduction
Converting 3 hp to kw results in about 2.237 kw. This shows how power measurement scales differ between traditional mechanical units and SI units. Knowing this helps in understanding engine power ratings and electrical power outputs more accurately across different contexts.
Conversion Tool
Result in kw:
Conversion Formula
The conversion from hp to kw is done by multiplying the horsepower value by 0.7457. This formula works because 1 horsepower equals exactly 0.7457 kilowatts, a standard used in engineering to convert mechanical power to electrical power units. For example, converting 5 hp to kw: 5 * 0.7457 = 3.7285 kw.
Conversion Example
- Convert 10 hp to kw:
- Step 1: Take the hp value, 10.
- Step 2: Multiply by 0.7457: 10 * 0.7457 = 7.457 kw.
- Result: 10 hp equals 7.457 kw.
- Convert 7.5 hp to kw:
- Step 1: Hp value is 7.5.
- Step 2: 7.5 * 0.7457 = 5.59275 kw.
- Result: 7.5 hp equals approximately 5.5928 kw.
- Convert 1.2 hp to kw:
- Step 1: Hp value is 1.2.
- Step 2: 1.2 * 0.7457 = 0.895 kw.
- Result: 1.2 hp equals 0.895 kw.
Conversion Chart
This chart shows power in hp from -22.0 to 28.0 and their equivalent in kw. Use it to quickly see conversions without calculator, or to verify your calculations. For example, -10 hp equals -7.457 kw, and 20 hp equals 14.914 kw.
| hp | kw |
|---|---|
| -22.0 | -16.406 |
| -20.0 | -14.914 |
| -18.0 | -13.423 |
| -16.0 | -11.932 |
| -14.0 | -10.440 |
| -12.0 | -8.949 |
| -10.0 | -7.457 |
| -8.0 | -5.966 |
| -6.0 | -4.474 |
| -4.0 | -2.983 |
| -2.0 | -1.491 |
| 0.0 | 0.000 |
| 2.0 | 1.491 |
| 4.0 | 2.983 |
| 6.0 | 4.474 |
| 8.0 | 5.966 |
| 10.0 | 7.457 |
| 12.0 | 8.949 |
| 14.0 | 10.440 |
| 16.0 | 11.932 |
| 18.0 | 13.423 |
| 20.0 | 14.914 |
| 22.0 | 16.406 |
| 24.0 | 17.897 |
| 26.0 | 19.388 |
| 28.0 | 20.880 |
Related Conversion Questions
- How many kw are in 3 hp for an electric motor?
- What is the watt equivalent of 3 horsepower?
- How do I convert 3 hp to electrical power units?
- Is 3 hp enough for a small generator in kw?
- What is the power in kw of a 3 hp engine?
- Can I use 3 hp in kw for my mechanical project?
- What is the kilowatt equivalent of 3 horsepower in industrial equipment?
Conversion Definitions
hp: Horsepower is a unit measuring mechanical or engine power, originally based on the power required to lift 550 pounds by one foot in one second, now standardized as 745.7 watts, used to rate engines, motors and other machinery.
kw: Kilowatt is a metric power unit equal to 1,000 watts, used globally to express electrical power, industrial output, and energy consumption, facilitating comparison across electrical and mechanical systems worldwide.
Conversion FAQs
How accurate is converting 3 hp to kw using the formula?
The conversion is highly precise because the factor 0.7457 is standardized. However, slight variations might occur depending on context or measurement standards, but for most practical purposes, it’s very reliable.
Can I convert horsepower to kw manually without a calculator?
Yes, by multiplying the hp number by 0.7457, but for larger or fractional numbers, using a calculator or calculator app helps avoid errors. For quick estimates, rounding to 0.75 can be acceptable but less accurate.
Are there differences in hp and kw conversions for different types of power?
Yes, depending on whether you work with mechanical horsepower or electrical horsepower, the conversion factor might vary slightly. The standard mechanical hp uses 0.7457 kw, but other types may have different values.
Is the conversion factor the same worldwide?
Yes, the 0.7457 conversion factor for hp to kw is universally accepted in engineering, ensuring consistent conversions across countries and industries.