Conversion of Horsepower to Watts (hp to W)
Please input the power in the unit of horsepower below in order to obtain the corresponding value in watts.
Results in Watts:
1 hp(I) is equivalent to 745.699872 W.
How to Convert Horsepower to Watts
To convert horsepower into a watt measurement, you can utilize one of the following formulas.
Mechanical Horsepower to Watts
The formula to convert mechanical horsepower into watts is as follows:
watts = hp(I) × 745.699872
Since one mechanical horsepower equals 745.699872 watts, the formula to calculate the value in watts is to multiply the mechanical horsepower by 745.699872.
For instance, here is the procedure to convert 5 mechanical horsepower into watts using the formula:
5 hp(I) = (5 × 745.699872) = 3,728.499358 W.
Electric Horsepower to Watts
The formula to convert electric horsepower into watts is as follows:
watts = hp(E) × 746
Since one electric horsepower equals 746 watts, the formula to calculate the value in watts is to multiply the electric horsepower by 746.
For example, here is the process to convert 5 electric horsepower into watts using the formula:
5 hp(E) = (5 × 746) = 3,730 W.
Metric Horsepower to Watts
The formula to convert metric horsepower into watts is as follows:
watts = hp(M) × 735.49875
Since one metric horsepower equals 735.49875 watts, the formula to calculate the value in watts is to multiply the metric horsepower by 735.49875.
For example, here is the method to convert 5 metric horsepower into watts using the formula:
5 hp(M) = (5 × 735.49875) = 3,677.49375 W.
Boiler Horsepower to Watts
The formula to convert boiler horsepower into watts is as follows:
watts = hp(S) × 9,809.5
Since one boiler horsepower equals 9,809.5 watts, the formula to calculate the value in watts is to multiply the boiler horsepower by 9,809.5.
For example, here is the procedure to convert 5 boiler horsepower into watts using the formula:
5 hp(S) = (5 × 9,809.5) = 49,047.5 W.
How Many Watts Are in a Horsepower?
There are 745.699872 watts in one horsepower, which is why this value is utilized in the above formulas.
1 hp = 745.699872 W.
Horsepower and watts are both units used for measuring power. For additional information about each unit of measure, continue reading.
Horsepower
There are various types of horsepower, such as mechanical, electrical, metric, boiler, brake, and indicated, and they all serve different purposes in various industries. Mechanical and electrical horsepower are the most commonly employed.
Mechanical Horsepower
Mechanical horsepower is frequently used to measure the output of engines and motors in North America. One mechanical horsepower is equal to 745.69987158227022 watts.
Mechanical horsepower is a unit of power in the US customary and imperial systems, abbreviated as hp(I). For example, 1 mechanical horsepower can be written as 1 hp(I).
Electric Horsepower
Electric horsepower is utilized for gauging the output of electric motors and other electrical machines in the US.
An electric horsepower corresponds precisely to 746 watts.
The electric horsepower is a unit of power in the US customary and imperial systems. It can be denoted as hp(E), for instance, 1 electric horsepower can be represented as 1 hp(E).
Metric Horsepower
A metric horsepower is the amount of power required to lift a mass of 75 kilograms at a rate of one meter per second. This is equal to 735.49875 watts.
The metric horsepower is a metric unit of power that is not part of the International System of Units (SI). It can be abbreviated as hp(M) and is sometimes also abbreviated as PS, cv, hk, pk, ks, or ch. For example, 1 metric horsepower can be written as 1 hp(M), 1 PS, 1 cv, 1 hk, 1 pk, 1 ks, or 1 ch.
Boiler Horsepower
Boiler horsepower is used to measure the power of a boiler in generating steam. One boiler horsepower is equivalent to the power required to evaporate 34.5 pounds of water in one hour.
Boiler horsepower can be represented as hp(S). For instance, 1 boiler horsepower can be written as 1 hp(S).
The term "horsepower" was coined by James Watt, a Scottish inventor, to quantify the power output of his steam engine and compare it to that of horses. Horsepower later became a measure of power output for piston engines, turbine engines, and electric motors.
Try our engine horsepower calculator to determine the power of a motor.
Watts
One watt is equal to the rate at which energy is transferred at a rate of one joule per second in an electrical circuit. It is also equivalent to the power produced in a circuit with a voltage potential of one volt and a current of one ampere.
The watt is the derived unit for power in the International System of Units (SI). It is abbreviated as W, for example, 1 watt can be written as 1 W.
The correlation between power, current, and voltage is elucidated by Watt's Law. By utilizing Watt's Law, the power measured in watts can be represented using current and voltage.
PW = IA × VV
The power measured in watts is the product of the current measured in amperes and the potential difference measured in volts.
In conjunction with Ohm's Law, the power measured in watts can also be expressed by including resistance along with volts and amps.

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