Enter the torque, horsepower, and rotational speed into the calculator to determine the missing variable.
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Hp To Ft-Lbs Formula
The following formula is used to calculate the torque, horsepower, or rotational speed when the other two variables are known.
T = (HP * 5252) / RPM
Variables:
- T is the torque in foot-pounds (ft-lbs)
- HP is the horsepower
- RPM is the rotational speed in revolutions per minute
To calculate the torque, multiply the horsepower by 5252 and divide the result by the rotational speed (RPM).
| Horsepower (HP) | Torque @ 1000 RPM (ft-lb) | Torque @ 1500 RPM (ft-lb) | Torque @ 2000 RPM (ft-lb) | Torque @ 2500 RPM (ft-lb) | Torque @ 3000 RPM (ft-lb) | Torque @ 4000 RPM (ft-lb) | Torque @ 5000 RPM (ft-lb) |
|---|---|---|---|---|---|---|---|
| 5 | 26.3 | 17.5 | 13.1 | 10.5 | 8.8 | 6.6 | 5.3 |
| 10 | 52.5 | 35.0 | 26.3 | 21.0 | 17.5 | 13.1 | 10.5 |
| 15 | 78.8 | 52.5 | 39.4 | 31.5 | 26.3 | 19.7 | 15.8 |
| 20 | 105.0 | 70.0 | 52.5 | 42.0 | 35.0 | 26.3 | 21.0 |
| 25 | 131.3 | 87.5 | 65.7 | 52.5 | 43.8 | 32.8 | 26.3 |
| 30 | 157.6 | 105.0 | 78.8 | 63.0 | 52.5 | 39.4 | 31.5 |
| 40 | 210.1 | 140.1 | 105.0 | 84.0 | 70.0 | 52.5 | 42.0 |
| 50 | 262.6 | 175.1 | 131.3 | 105.0 | 87.5 | 65.7 | 52.5 |
| 60 | 315.1 | 210.1 | 157.6 | 126.0 | 105.0 | 78.8 | 63.0 |
| 75 | 393.9 | 262.6 | 197.0 | 157.6 | 131.3 | 98.5 | 78.8 |
| 100 | 525.2 | 350.1 | 262.6 | 210.1 | 175.1 | 131.3 | 105.0 |
| 125 | 656.5 | 437.7 | 328.3 | 262.6 | 218.8 | 164.1 | 131.3 |
| 150 | 787.8 | 525.2 | 393.9 | 315.1 | 262.6 | 197.0 | 157.6 |
| 175 | 919.1 | 612.7 | 459.6 | 367.6 | 306.4 | 229.8 | 183.8 |
| 200 | 1050.4 | 700.3 | 525.2 | 420.2 | 350.1 | 262.6 | 210.1 |
| 250 | 1313.0 | 875.3 | 656.5 | 525.2 | 437.7 | 328.3 | 262.6 |
| 300 | 1575.6 | 1050.4 | 787.8 | 630.2 | 525.2 | 393.9 | 315.1 |
| 350 | 1838.2 | 1225.5 | 919.1 | 735.3 | 612.7 | 459.6 | 367.6 |
| 400 | 2100.8 | 1400.5 | 1050.4 | 840.3 | 700.3 | 525.2 | 420.2 |
| 500 | 2626.0 | 1750.7 | 1313.0 | 1050.4 | 875.3 | 656.5 | 525.2 |
| Uses T(ft-lb) = HP × 5252 ÷ RPM. Values rounded to 1 decimal. 5252 = 33,000 ÷ (2π). | |||||||
What is Hp To Ft-Lbs?
The Hp to Ft-Lbs calculator is a tool used to convert horsepower (HP) to torque (ft-lbs) or vice versa, given the rotational speed (RPM). Horsepower is a unit of power that measures the rate at which work is done, while torque is a measure of the rotational force applied to an object. The relationship between horsepower, torque, and rotational speed is crucial in various applications, including automotive engineering, machinery, and mechanical systems. Understanding this relationship helps in optimizing performance and efficiency in engines and other rotating equipment.
How to Calculate Hp To Ft-Lbs?
The following steps outline how to calculate the Hp to Ft-Lbs.
- First, determine the horsepower (HP).
- Next, determine the rotational speed (RPM).
- Finally, calculate the torque using the formula T = (HP * 5252) / RPM.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Horsepower (HP) = 150
Rotational Speed (RPM) = 3000