Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Mechanical
Bolt Torque Calculator
Calculates the tightening torque required to achieve a target clamp load in a bolted joint, based on bolt diameter, material strength, and friction. Use it when assembling structural or mechanical joints to avoid under- or over-tightening.
Fill in the required fields to see your result.
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.
Key differences
| Bolt Torque Calculator | Shaft Torque Calculator | |
|---|---|---|
| Category | Mechanical | Mechanical |
| Inputs required | 4 | 4 |
| Result | Required Torque (N·m) | Required Diameter (mm) |
| What it does | Calculates the tightening torque required to achieve a target clamp load in a bolted joint, based on bolt diameter, material strength, and friction. Use it when assembling structural or mechanical joints to avoid under- or over-tightening. | 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. |