Convert Horsepower (mech) (hp) to Watt (W) instantly. Enter any value and get the result immediately.
hp → W Converter
| Horsepower (mech) (hp) | Watt (W) |
|---|---|
| 0.1 hp | 74.57 W |
| 0.5 hp | 372.85 W |
| 1 hp | 745.7 W |
| 2 hp | 1491.4 W |
| 5 hp | 3728.5 W |
| 10 hp | 7457 W |
| 20 hp | 14,914 W |
| 50 hp | 37,285 W |
| 100 hp | 74,570 W |
| 200 hp | 149,140 W |
| 500 hp | 372,850 W |
| 1000 hp | 745,700 W |
| 5000 hp | 3,728,500 W |
| 10000 hp | 7,457,000 W |
The formula to convert mechanical Horsepower (hp) to Watt (W) is:
Reverse formula — Watts to hp:
Step-by-step example — Convert 50 hp to W:
Common examples:
Mechanical horsepower (hp) is an imperial unit of power originally defined by Scottish engineer James Watt in the 18th century. He defined it as the power needed to do 33,000 foot-pounds of work per minute — based on his observations of how much work a horse could sustain over a full working day. When converted precisely to SI units, this equals 745.69987 watts, commonly rounded to 745.7 W.
Horsepower is used to rate car engines, motorcycles, water pumps, electric motors, and industrial machinery. In India, motor pumps for agriculture and water supply are commonly rated in horsepower.
The watt (W) is the SI base unit of power — the global scientific and engineering standard. Named after James Watt himself, it represents the rate of energy transfer of one joule per second. Every electrical appliance is rated in watts — from a 10W LED bulb to a 2,000W electric geyser. Your electricity bill is calculated in kilowatt-hours (kWh) — where 1 kWh = 1,000 watts running for 1 hour.
| Vehicle / Motor | Horsepower (hp) | Watts (W) |
|---|---|---|
| 1 HP agriculture pump | 1 hp | 745.7 W |
| Small scooter (100cc) | 8 hp | 5,965.6 W |
| 5 HP water pump (India) | 5 hp | 3,728.5 W |
| Maruti Alto K10 | 67 hp | 49,961.9 W |
| Honda City | 121 hp | 90,229.7 W |
| Hyundai Creta | 157 hp | 117,074.9 W |
| BMW M3 | 503 hp | 375,087.1 W |
| Bugatti Chiron | 1,479 hp | 1,102,800.3 W |
In India, agricultural water pumps are commonly rated in horsepower. Here is the watt equivalent:
| Pump Rating (hp) | Watts (W) | Kilowatts (kW) |
|---|---|---|
| 0.5 hp | 372.85 W | 0.373 kW |
| 1 hp | 745.7 W | 0.746 kW |
| 2 hp | 1,491.4 W | 1.491 kW |
| 3 hp | 2,237.1 W | 2.237 kW |
| 5 hp | 3,728.5 W | 3.729 kW |
| 7.5 hp | 5,592.75 W | 5.593 kW |
| 10 hp | 7,457 W | 7.457 kW |
| 15 hp | 11,185.5 W | 11.186 kW |
James Watt defined horsepower as 33,000 foot-pounds per minute. Converting to SI units:
Multiply hp by 745.7. Formula: W = hp × 745.7. Example: 5 hp × 745.7 = 3,728.5 W.
1 mechanical horsepower = 745.7 watts. This is the exact SI equivalent of mechanical horsepower, defined as 33,000 foot-pounds per minute.
1,000 watts = 1 kW = 1.341 hp. Formula: hp = W ÷ 745.7 → 1000 ÷ 745.7 = 1.341 hp.
100 hp = 74,570 watts = 74.57 kW. Formula: 100 × 745.7 = 74,570 W.
1 hp = 745.7 W = 0.7457 kW. To convert hp directly to kW, multiply by 0.7457.
James Watt defined 1 horsepower as 33,000 foot-pounds of work per minute. When this is precisely converted to SI units (meters, newtons, seconds), it equals 745.69987 watts — rounded to 745.7 W.