Convert Horsepower to Watts
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Engineering
Real-World Reference Values
| Value | Watts | |
|---|---|---|
| 0.5 hp | 372.8 W | Garbage disposal or sump pump |
| 1 hp | 745.7 W | Pool pump or large exhaust fan |
| 5 hp | 3,728 W | Table saw or large air compressor |
| 10 hp | 7,457 W | Industrial motor |
| 25 hp | 18,642 W | Large HVAC compressor |
Common Uses
- Determining the circuit breaker and wiring size for a motor rated in hp
- Checking whether a UPS or generator can handle a motor's running wattage
- Estimating energy cost: watts × hours = watt-hours consumed
Practical Tips
Quick Conversions
| Unit Name | Symbol | Per 1 Horsepower |
|---|---|---|
| BTU per Hour | BTU/h | 2544.43 |
| Foot-pound per Second | ft·lbf/s | 550 |
| Gigawatt | GW | 7.457 × 10⁻⁷ |
| Horsepower | hp | 1 |
| Kilocalorie per Hour | kcal/h | 641.186 |
| Kilowatt | kW | 0.7457 |
| Megawatt | MW | 0.0007457 |
| Metric Horsepower | PS | 1.01387 |
| Milliwatt | mW | 745700 |
| Watt | W | 745.7 |
Frequently Asked Questions
How do I convert Horsepower to Watts?
To convert Horsepower to Watts, use the conversion where 1 Horsepower (hp) = 745.7 Watts (W). For example, 1 Horsepower = 745.7 Watts.
What are common Horsepower to Watt conversions?
Here are common conversions: 1 Horsepower = 745.7 Watts, 5 Horsepower = 3728.5 Watts, 10 Horsepower = 7457 Watts, 25 Horsepower = 18642.5 Watts, 50 Horsepower = 37285 Watts, 100 Horsepower = 74570 Watts.
When would I need to convert Horsepower to Watts?
Determining the circuit breaker and wiring size for a motor rated in hp. Checking whether a UPS or generator can handle a motor's running wattage. Estimating energy cost: watts × hours = watt-hours consumed.
How precise are the conversions?
All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.
How many Watts is 0.5 Horsepower? (Garbage disposal or sump pump)
0.5 Horsepower equals 372.8 W Watts. This is a frequently referenced value because it represents garbage disposal or sump pump.