Use this watts to horsepower converter to change a watt measurement into its horsepower equivalent. Enter a number in the calculator above and the result updates instantly.
Power conversions help compare engines, electric motors, appliances, HVAC systems, generators, and mechanical output ratings.
What is a watt?
A watt is the SI unit of power. It measures the rate at which energy is used, produced, or transferred.
What is a horsepower?
Horsepower is a power unit commonly used for engines, motors, vehicles, pumps, and mechanical output ratings.
Watts to Horsepower Converter formula
To convert watts to horsepower, use the formula below.
1 hp = 745.699871582 W. This relationship is the conversion factor used by the calculator.
How to convert watts to horsepower
Start with the watt value, apply the formula, and round the result only after the calculation is complete.
Example: 10 W = 0.0134102209 hp.
- 1 W = 0.0013410221 hp
- 10 W = 0.0134102209 hp
- 100 W = 0.134102209 hp
Manual conversion steps
- Write down the value in watts.
- Use the conversion formula: horsepower = watts / 745.699871582.
- Calculate the result in horsepower.
- Round the answer to the number of decimal places you need.
For quick checking, the converter above performs the same calculation automatically.
Common watts to horsepower use cases
This conversion is useful in practical situations where measurements need to move between different unit systems or audiences.
- Convert watts to horsepower when you need equivalent measurements in another unit.
Common mistakes when converting watts to horsepower
These are the most common issues to watch for when doing this conversion by hand.
- Do not mix up the direction of the conversion. watts to horsepower is not the same as horsepower to watts.
- Avoid rounding too early. Keep the full result during the calculation, then round the final answer.
Watts to Horsepower conversion table
| Watt | Horsepower |
|---|---|
| 1 W | 0.0013410221 hp |
| 5 W | 0.0067051104 hp |
| 10 W | 0.0134102209 hp |
| 25 W | 0.0335255522 hp |
| 50 W | 0.0670511045 hp |
| 100 W | 0.134102209 hp |
How to convert horsepower to watts
To reverse the conversion, switch the two units in the calculator or open the reverse conversion page: horsepower to watts.
Reversing the units is useful when you already have a value in horsepower and need the equivalent value in watts.
How to use this watts to horsepower converter
- Enter the number you want to convert in the value field.
- Confirm that the from unit is Watt and the to unit is Horsepower.
- Read the converted result in the result box.
- Use the copy button if you want to paste the answer elsewhere.
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FAQ
What is the formula for watts to horsepower?
The formula is: horsepower = watts / 745.699871582.
How do I convert watts to horsepower by hand?
Write down the value in watts, apply the formula, and round the final result in horsepower.
How accurate is this converter?
The converter uses standard conversion factors and shows rounded results for readability.
Can I reverse the conversion?
Yes. Use the swap button in the converter or open the related reverse conversion page.
Why do results sometimes have many decimal places?
Some unit conversions do not produce short decimal values. Keep more decimal places for technical work, and round the answer for everyday use.