Enter the torque applied, length of shaft, polar moment of inertia, and shear modulus into the calculator to determine the angle of twist.

## Angle of Twist Formula

The following formula can be used to calculate the angle of twist of a solid shaft.

a = ( T * L )/( J * G)

- Where a is the angle of twist (radians)
- T is the torque applied (N*m)
- L is the length (m)
- J is the polar moment of inertia
- G is the shear modulus (N/m^2)

## FAQ

**What is angle of twist?**

An angle of twist the the measure of the amount of twist an object, typically a rod, undergoes when a torque is applied in to the ends of the rod.

**What is the polar moment of inertia?**

The polar moment of a inertia is the measure of the objects resistance to twisting.

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