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Both calculators run independently — change the inputs on either side to compare results.
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.
Mechanical
Torque and Power Calculator
Convert between torque, rotational speed, and mechanical power for motors, engines, and drivetrain components. Use it when sizing a motor or verifying shaft power output at a given RPM and efficiency.
Fill in the required fields to see your result.
Key differences
| Shaft Torque and Stress Calculator | Torque and Power Calculator | |
|---|---|---|
| Category | Mechanical | Mechanical |
| Inputs required | 3 | 4 |
| Result | Maximum Torque Capacity (N·m) | Result (kW) |
| What it does | 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. | Convert between torque, rotational speed, and mechanical power for motors, engines, and drivetrain components. Use it when sizing a motor or verifying shaft power output at a given RPM and efficiency. |