Watts to Horsepower
Convert watt to horsepower instantly — type a value and read the result, with the exact formula shown.
Reviewed by the CalcCafe editorial team · Last updated 1 July 2026 · How we test our tools
Example
1 W = 0.001341022 hp, 5 W = 0.00670511 hp, 10 W = 0.01341022 hp.
Common conversions: watt to horsepower
Quick reference for the W → hp values you are most likely to need, computed with the exact factor the converter above uses. It includes the specific values people most often look up (1,000 W, 746 W, 1,500 W, 250 W, 750 W). See also the reverse converter: Horsepower to Watt.
| Watt (W) | Horsepower (hp) |
|---|
| 1 W | 0.001341 hp |
| 2 W | 0.002682 hp |
| 3 W | 0.004023 hp |
| 5 W | 0.006705 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 |
| 70 W | 0.093872 hp |
| 75 W | 0.100577 hp |
| 80 W | 0.107282 hp |
| 90 W | 0.120692 hp |
| 100 W | 0.134102 hp |
| 150 W | 0.201153 hp |
| 200 W | 0.268204 hp |
| 250 W | 0.335256 hp |
| 500 W | 0.670511 hp |
| 746 W | 1.0004 hp |
| 750 W | 1.0058 hp |
| 1,000 W | 1.341 hp |
| 1,500 W | 2.0115 hp |
| 5,000 W | 6.7051 hp |
Horsepower to Watt
| Horsepower (hp) | Watt (W) |
|---|
| 1 hp | 745.6999 W |
| 5 hp | 3,728.5 W |
| 10 hp | 7,457 W |
| 50 hp | 37,284.99 W |
| 100 hp | 74,569.99 W |
How it works
Horsepower = Watt × 0.001341022. Every value is converted through a single watt base unit using internationally defined conversion factors, so any from/to pair stays consistent.
Good to know
Converting watts to horsepower comes up whenever an electrically rated device needs to be compared against a mechanically rated one. You see it when sizing a pool pump or air compressor against its electrical draw, when reading the wattage on a treadmill or e-bike motor and wanting a "feel" for its pulling power, or when a generator is listed in watts but the equipment it must drive is spec'd in hp. Because so much modern hardware ships with watt labels but legacy machinery still speaks horsepower, this is one of the most practical bridges between the two worlds.
The watt is the SI metric unit of power, named after James Watt and defined cleanly as one joule per second. Horsepower is the imperial holdover Watt himself coined to market steam engines against draft horses. The version this tool uses is mechanical (imperial) horsepower, where 1 hp = 745.6999 W. Note that metric horsepower (PS/CV, common on European car spec sheets) is slightly smaller at about 735.5 W, so the two are not interchangeable.
For quick mental math, treat 1 hp as roughly 746 watts, or about three-quarters of a kilowatt. A handy shortcut: divide watts by 750 to get a fast, slightly conservative horsepower estimate, then nudge it up a touch. So 1,000 W is just over 1.3 hp, and 3,000 W lands near 4 hp.
The classic mistake is confusing a motor's electrical input watts with its mechanical output horsepower. A motor is never 100% efficient, so a "1 hp" electric motor may pull 900-1,000 input watts from the wall rather than 746. This converter does the pure unit math; it does not account for efficiency losses, so use it for nameplate conversions, not for predicting real shaft output from input power.
Frequently asked questions
How do you convert watt to horsepower?
Multiply the number of watts by 0.001341022 to get horsepowers. For example, 1 W = 0.001341022 hp.
What is 1 watt in horsepowers?
1 watt equals 0.001341022 horsepowers (1 W = 0.001341022 hp).
How many watts are in 1 horsepower?
There are 745.6999 watts in 1 horsepower.
Is this converter free and private?
Yes. It runs entirely in your browser, so your inputs never leave your device, there is no sign-up, and it works offline once loaded.
Are the conversions exact?
Conversions use internationally defined factors and are exact where the definitions are exact (for example, 1 inch = 2.54 cm). Displayed results are rounded for readability.
People also ask
How many watts is 1 horsepower?
One mechanical horsepower equals 745.6999 watts, which is usually rounded to 746 W. Metric horsepower (PS) is slightly less at about 735.5 W.
How do I convert 1000 watts to horsepower?
Multiply 1000 by 0.001341022, which gives about 1.341 hp. As a shortcut, dividing 1000 by 746 gives the same result of roughly 1.34 hp.
How much horsepower is 2000 watts?
2000 watts equals about 2.68 hp (2000 × 0.001341022 = 2.682 hp). That is a little under 3 horsepower.
Is mechanical horsepower the same as metric horsepower?
No. Mechanical (imperial) horsepower is 745.6999 W, while metric horsepower (PS or CV) is about 735.5 W, roughly 1.4% smaller. This converter uses mechanical horsepower.
How many horsepower is a 1500 watt motor?
A 1500 W rating equals about 2.01 hp (1500 × 0.001341022 ≈ 2.012 hp). Keep in mind this is input power, so the motor's actual output may be lower due to efficiency losses.
Why is my electric motor's wattage higher than its rated horsepower?
Because the watt figure is often the electrical input while the horsepower is the mechanical output. Motors are not 100% efficient, so a 1 hp motor (746 W ideal) might draw 900-1000 W from the wall.
How many watts is a 5 hp motor?
Five mechanical horsepower equals 3728.5 watts (5 × 745.6999). That is roughly 3.73 kilowatts of power.
Is 750 watts equal to 1 hp?
Not exactly, but it is a close rule of thumb. One mechanical horsepower is 745.7 W, so 750 W = 750 × 0.001341022 = 1.0058 hp, about 0.6 percent over. Metric horsepower (PS, used on many European engines) is 735.5 W, which makes 750 W about 1.02 PS. For quick estimates 750 W per horsepower is fine; for motor ratings use the exact 745.7 figure.
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Sources & references
These tools follow our methodology and provide educational estimates only — verify important figures with a qualified professional.