Q:
# How Is Horsepower Calculated?

**The formula to calculate horsepower is torque in pound-foot units multiplied by rotational speed and divided by 5,252.** The formula changes when torque is in pound-inches to multiplying torque by rotational speed and dividing by 63,025.

Horsepower measures the rate at which work is done. Scottish engineer James Watt invented the term when he compared steam engines to draft horses, and the term currently applies to piston engines, turbines and electric motors as well as other types of machinery. Mechanical horsepower is 33,000 foot-pounds per minute or 550 foot-pounds per second. Most countries use the International System of Units watt when measuring horsepower.

Learn more about Measurements-
Q:
## How Many Amps Are in 1 Horsepower?

A: There is no direct conversion for determining the amount of amps in 1 horsepower. In order to convert between the two, it is necessary to know the voltage ... Full Answer >Filed Under: -
Q:
## How Do You Convert Small-Engine Cubic Centimeters Into Horsepower?

A: Estimate small engine horsepower by dividing the engine's cubic centimeter measurement by 32.5. There is no direct conversion between cubic centimeters and... Full Answer >Filed Under: -
Q:
## How Many CCs Equal 1 Horsepower?

A: The answer to how many CCs equal one horsepower can only be estimated at 1HP per 15-25 CCs. There are too many variables to enable an exact calculation. Full Answer >Filed Under: -
Q:
## How Many Pounds of Thrust Are in One Horsepower?

A: The Oxford Dictionary defines horsepower as a unit of power equal to 550 foot-pounds per second. Because horsepower represents the total produced power of ... Full Answer >Filed Under: