Watts to Horsepower Converter
Convert power from watts (W) to different types of horsepower.
How to Convert Watts to Horsepower
👋 Curious about how power in watts relates to horsepower? Let’s break it down! 🚀
Watts to Horsepower Conversion ✨
One mechanical or hydraulic horsepower is equal to 745.699872 watts:
1 hp(I) = 745.699872 WSo the power conversion of watts to horsepower is given by:
P(hp) = P(W) / 745.699872Example
Convert 10W to mechanical horsepower:
P(hp) = 10W / 745.699872 = 0.01341 hpWatts to Electrical Horsepower ✨
One electrical horsepower is equal to 746 watts:
1 hp(E) = 746 WSo the power conversion of watts to horsepower is given by:
P(hp) = P(W) / 746Example
Convert 10W to electrical horsepower:
P(hp) = 10W / 746 = 0.013405 hpWatts to Metric Horsepower ✨
One metric horsepower is equal to 735.49875 watts:
1 hp(M) = 735.49875 WSo the power conversion of watts to horsepower is given by:
P(hp) = P(W) / 735.49875Example
Convert 10W to metric horsepower:
P(hp) = 10W / 735.49875 = 0.013596 hpUnderstanding the Conversion
The relationship between watts and horsepower is defined by the formulas above. Simply input the known values and use the formulas to calculate the horsepower.
Where Do We Use This in Real Life? 🌟
Mechanical Engineering ⚙️
Understanding power ratings for engines and machinery
Electrical Engineering 💡
Calculating power requirements for electrical systems
Automotive Industry 🚗
Determining engine power output and performance
Watts to Horsepower Conversion Table
| Watts [W] | Mechanical Horsepower [hp(I)] | Electric Horsepower [hp(E)] | Metric Horsepower [hp(M)] |
|---|---|---|---|
| 1 W | 0.001341 hp | 0.001340 hp | 0.001360 hp |
| 2 W | 0.002682 hp | 0.002681 hp | 0.002719 hp |
| 3 W | 0.004023 hp | 0.004021 hp | 0.004079 hp |
| 4 W | 0.005364 hp | 0.005362 hp | 0.005438 hp |
| 5 W | 0.006705 hp | 0.006702 hp | 0.006798 hp |
| 6 W | 0.008046 hp | 0.008043 hp | 0.008158 hp |
| 7 W | 0.009387 hp | 0.009383 hp | 0.009517 hp |
| 8 W | 0.010728 hp | 0.010724 hp | 0.010877 hp |
| 9 W | 0.012069 hp | 0.012064 hp | 0.012237 hp |
| 10 W | 0.013410 hp | 0.013405 hp | 0.013596 hp |
| 20 W | 0.026820 hp | 0.026810 hp | 0.027192 hp |
| 30 W | 0.040231 hp | 0.040214 hp | 0.040789 hp |
| 40 W | 0.053641 hp | 0.053619 hp | 0.054385 hp |
| 50 W | 0.067051 hp | 0.067024 hp | 0.067981 hp |
| 60 W | 0.080461 hp | 0.080429 hp | 0.081577 hp |
| 70 W | 0.093871 hp | 0.093834 hp | 0.095174 hp |
| 80 W | 0.107282 hp | 0.107239 hp | 0.108770 hp |
| 90 W | 0.120692 hp | 0.120643 hp | 0.122366 hp |
| 100 W | 0.134022 hp | 0.134048 hp | 0.135962 hp |
| 200 W | 0.268204 hp | 0.268097 hp | 0.271924 hp |
| 300 W | 0.402307 hp | 0.402145 hp | 0.407886 hp |
| 400 W | 0.536409 hp | 0.536193 hp | 0.543849 hp |
| 500 W | 0.670511 hp | 0.670241 hp | 0.679811 hp |
FAQs
How do I convert watts to horsepower?
To convert watts to horsepower (hp), you can use the following formula:
Horsepower (hp) = Watts (W)/745.7
Where:
1 horsepower = 745.7 watts
How many watts is 1 horsepower?
1 horsepower is equal to 745.7 watts. This conversion factor is used universally to change between the two power units.
Can I use this conversion for both mechanical and electrical power?
Yes, the conversion from watts to horsepower works for both mechanical and electrical power, as the two units are defined in the same way. However, the efficiency of the machine or system may affect the actual output power delivered in mechanical horsepower.
How does the efficiency of an electric motor affect horsepower?
While the conversion from watts to horsepower is straightforward (745.7 watts = 1 horsepower), the motor's efficiency can affect the amount of usable horsepower.
An electric motor may convert electrical watts to mechanical horsepower, but some energy may be lost as heat. The mechanical horsepower delivered to the load will be less than the electrical power consumed if the motor is not 100% efficient.
What is the difference between metric and mechanical horsepower?
The formula for converting watts to horsepower (745.7 watts = 1 hp) is based on mechanical horsepower.
However, metric horsepower, commonly used in Europe, is slightly different: 1 metric horsepower = 735.5 watts. So, if you use metric horsepower, you would divide by 735.5 instead of 745.7.
Why is horsepower used as a unit of power?
James Watt originally coined the term 'horsepower' to quantify the power of steam engines in a way relatable to the public.
He compared the output of his steam engine to the work done by a horse, which was a common power source at the time. Since then, horsepower has become a standard unit used to describe the power of engines and motors.
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