How to convert watts to Horsepower
To convert watts to Horsepower, multiply the value by the conversion factor 0.0013410221. To go the other way, multiply by 745.6998716 (or divide by 0.0013410221).
Worked example: 25 W to hp
- Write the value: 25 W
- Multiply by 0.0013410221: 25 × 0.0013410221
- Result: 0.0335256 hp
Watt to Horsepower conversion table
Quick reference values, rounded to 6 significant digits.
| Watt (W) | Horsepower (hp) |
|---|---|
| 0.1 W | 0.000134102 hp |
| 0.25 W | 0.000335256 hp |
| 0.5 W | 0.000670511 hp |
| 1 W | 0.00134102 hp |
| 2 W | 0.00268204 hp |
| 3 W | 0.00402307 hp |
| 4 W | 0.00536409 hp |
| 5 W | 0.00670511 hp |
| 6 W | 0.00804613 hp |
| 7 W | 0.00938715 hp |
| 8 W | 0.0107282 hp |
| 9 W | 0.0120692 hp |
| 10 W | 0.0134102 hp |
| 12 W | 0.0160923 hp |
| 15 W | 0.0201153 hp |
| 20 W | 0.0268204 hp |
| 25 W | 0.0335256 hp |
| 30 W | 0.0402307 hp |
| 40 W | 0.0536409 hp |
| 50 W | 0.0670511 hp |
| 75 W | 0.100577 hp |
| 100 W | 0.134102 hp |
| 250 W | 0.335256 hp |
| 500 W | 0.670511 hp |
| 1,000 W | 1.34102 hp |
Horsepower to Watt
| hp | W |
|---|---|
| 1 hp | 745.7 W |
| 5 hp | 3,728.5 W |
| 10 hp | 7,457 W |
| 50 hp | 37,284.99 W |
| 100 hp | 74,569.99 W |
1 Watt in other power units
About Watt and Horsepower
What is a watt (W)?
The watt is the SI unit of power, one joule per second.
What is a horsepower (hp)?
Mechanical horsepower is about 745.7 watts, used for engines and water pumps.
Air-conditioner tip: a 1-ton AC provides 12,000 BTU/h of cooling. A rough rule for Bangladesh is 1 ton per 100–120 sq ft of room area, more for top floors and west-facing rooms.
Where watt to horsepower conversion is used
Power conversions are needed for choosing air conditioners, generators, IPS/UPS, motors and solar panels. Converting between watts and Horsepower is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Power Converter.
Frequently asked questions
How many Horsepower are in 1 watt?
1 Watt equals 0.00134102 hp.
How do I convert watts to Horsepower?
Multiply the number of watts by 0.0013410221. For example, 25 W × 0.0013410221 = 0.0335256 hp.
What is 25 W in hp?
25 W = 0.0335256 hp.
How many watts are in 1 horsepower?
1 Horsepower equals 745.7 W. Use the HP to Watts converter for the reverse direction.
Is this Watt to Horsepower converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.