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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 and Stress Calculator
Determine the safe torque capacity and shear stress in a rotating shaft. Use this when designing drive shafts, axles, or couplings to ensure they won't fail under torsional load.
Fill in the required fields to see your result.
Key differences
| Bolt Torque Calculator | Shaft Torque and Stress Calculator | |
|---|---|---|
| Category | Mechanical | Mechanical |
| Inputs required | 4 | 3 |
| Result | Required Torque (N·m) | Maximum Torque Capacity (N·m) |
| 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 safe torque capacity and shear stress in a rotating shaft. Use this when designing drive shafts, axles, or couplings to ensure they won't fail under torsional load. |