The watt
The watt (W) is the SI derived unit of power, equal to one joule per second. It is the standard unit for the rated power of every electrical device and every modern engine specification outside automotive marketing.
Watts to Mechanical horsepower Converter
1 W = 0.00134102 hp
1 watt equals 0.00134102 mechanical horsepower. To convert watts to mechanical horsepower, multiply the watt value by 0.00134102. For quick reference: 1 W = 0.00134102 hp, 5 W = 0.00670511 hp, 10 W = 0.0134102 hp, 100 W = 0.134102 hp.
Formula
Mechanical horsepower = Watts × 0.00134102Quick
How to convert watts to mechanical horsepower
Take your value
Start with your value in watts.
Multiply by 0.00134102
Multiply the watt value by 0.00134102. This is the exact conversion factor from watts to mechanical horsepower.
Read the result
The product is your value in mechanical horsepower. For example, 5 W × 0.00134102 = 0.00670511 hp.
Conversion formula
The exact factor from watts to mechanical horsepower is 0.00134102.
Mechanical horsepower = Watts × 0.00134102
Watts to Mechanical horsepower conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Watts (W) | Mechanical horsepower (hp) |
|---|---|
| 0.1 W | 0.0001341 hp |
| 0.5 W | 0.00067051 hp |
| 1 W | 0.001341 hp |
| 2 W | 0.002682 hp |
| 5 W | 0.0067051 hp |
| 8 W | 0.010728 hp |
| 10 W | 0.01341 hp |
| 15 W | 0.020115 hp |
| 20 W | 0.02682 hp |
| 25 W | 0.033526 hp |
| 30 W | 0.040231 hp |
| 40 W | 0.053641 hp |
| 50 W | 0.067051 hp |
| 60 W | 0.080461 hp |
| 75 W | 0.10058 hp |
| 100 W | 0.1341 hp |
| 125 W | 0.16763 hp |
| 150 W | 0.20115 hp |
| 200 W | 0.2682 hp |
| 250 W | 0.33526 hp |
| 300 W | 0.40231 hp |
| 400 W | 0.53641 hp |
| 500 W | 0.67051 hp |
| 600 W | 0.80461 hp |
| 750 W | 1.0058 hp |
| 800 W | 1.0728 hp |
| 1000 W | 1.341 hp |
| 1200 W | 1.6092 hp |
| 1500 W | 2.0115 hp |
| 1800 W | 2.4138 hp |
| 2000 W | 2.682 hp |
| 2500 W | 3.3526 hp |
| 3000 W | 4.0231 hp |
| 5000 W | 6.7051 hp |
| 7500 W | 10.058 hp |
| 10000 W | 13.41 hp |
| 15000 W | 20.115 hp |
| 20000 W | 26.82 hp |
| 25000 W | 33.526 hp |
| 50000 W | 67.051 hp |
| 75000 W | 100.58 hp |
| 100000 W | 134.1 hp |
| 200000 W | 268.2 hp |
| 500000 W | 670.51 hp |
| 1000000 W | 1341 hp |
| 2000000 W | 2682 hp |
| 5000000 W | 6705.1 hp |
| 10000000 W | 13410 hp |
| 100000000 W | 134102 hp |
| 1000000000 W | 1341022 hp |
Real-world reference
An LED bulb uses about 8 W. A typical microwave oven draws around 1,000 W.
Frequently asked questions
- How many mechanical horsepower are in 1 watt?
- 1 watt equals 0.00134102 mechanical horsepower.
- How do I convert watts to mechanical horsepower?
- Multiply the watt value by 0.00134102. So x W × 0.00134102 = the equivalent in hp.
- What is 5 watts in mechanical horsepower?
- 5 watts equals 0.00670511 mechanical horsepower.
- What is 10 watts in mechanical horsepower?
- 10 watts equals 0.0134102 mechanical horsepower.
- What is 100 watts in mechanical horsepower?
- 100 watts equals 0.134102 mechanical horsepower.
- How do I convert back from mechanical horsepower to watts?
- Multiply the mechanical horsepower value by 745.7. For example, 1 hp = 745.7 W.
- Is the watt bigger than the mechanical horsepower?
- No. 1 watt is smaller than 1 mechanical horsepower. It takes 745.7 watts to equal 1 mechanical horsepower.
- Are these conversion factors exact?
- Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (0.00134102) is exact within IEEE 754 double precision.
About the watt and the mechanical horsepower
The mechanical horsepower
Mechanical (imperial) horsepower is defined as exactly 550 ft·lbf/s, or approximately 745.7 W. It is the standard 'horsepower' in the US and is the unit most often quoted for American cars and motorcycles.