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Shaft Torque and Stress Calculator

Calculate the maximum torsional shear stress in a solid circular shaft given applied torque and shaft diameter. Used in mechanical design to verify shafts against yield and fatigue limits before manufacture.

Applied Torque (Nm)

Shaft Diameter (mm)

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.

Torque (Nm)

Rotational Speed (RPM)

Mechanical Efficiency (%)

Calculate

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	2	4
Result	Maximum Shear Stress (MPa)	Result (kW)
What it does	Calculate the maximum torsional shear stress in a solid circular shaft given applied torque and shaft diameter. Used in mechanical design to verify shafts against yield and fatigue limits before manufacture.	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.