Enter the propeller horsepower (HP) and the propeller speed (RPM) into the calculator to determine the Propeller Torque.

## Propeller Torque Formula

The following formula is used to calculate the Propeller Torque.

**Tp = 5252 * PHP / PS**

- Where Tp is the Propeller Torque (N-m)
- PHP is the propeller horsepower (HP)
- PS is the propeller speed (RPM)

## How to Calculate Propeller Torque?

The following two example problems outline how to calculate the Propeller Torque.

**Example Problem #1:**

- First, determine the propeller horsepower (HP). In this example, the propeller horsepower (HP) is given as 23.
- Next, determine the propeller speed (RPM). For this problem, the propeller speed (RPM) is given as 85.
- Finally, calculate the Propeller Torque using the equation above:

Tp = 5252 * PHP / PS

Inserting the values from above and solving the equation with the imputed values gives:

Tp = 5252 * 23/ 85 = 1421.12 (N-m)

**Example Problem #2: **

Using the same process as above, first define the variables required by the formula. In this case, these values are:

propeller horsepower (HP) = 91

propeller speed (RPM) = 85

Entering these values yields:

Tp = 5252 * 91 / 85 = 5622.72 (N-m)