Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Mechanical
Shaft Torque Calculator
Determine the minimum shaft diameter needed to safely transmit a given power at a specified speed and shear stress limit. Essential for mechanical designers sizing drive shafts, motor shafts, and spindles.
Fill in the required fields to see your result.
Mechanical
Shaft Power Calculator
Calculates the mechanical power transmitted through a rotating shaft given its torque and rotational speed. Use this when sizing motors, gearboxes, or drive shafts in mechanical systems.
Fill in the required fields to see your result.
Key differences
| Shaft Torque Calculator | Shaft Power Calculator | |
|---|---|---|
| Category | Mechanical | Mechanical |
| Inputs required | 4 | 2 |
| Result | Required Diameter (mm) | Power (W) |
| What it does | Determine the minimum shaft diameter needed to safely transmit a given power at a specified speed and shear stress limit. Essential for mechanical designers sizing drive shafts, motor shafts, and spindles. | Calculates the mechanical power transmitted through a rotating shaft given its torque and rotational speed. Use this when sizing motors, gearboxes, or drive shafts in mechanical systems. |