Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

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.

Mechanical

Screw Torque Calculator

Calculates the torque needed to clamp a fastener to a target axial force, accounting for thread geometry and friction. Use it when tightening critical bolted joints to avoid under- or over-torquing.

Thread Pitch (mm)

Axial Force (N)

Mean Thread Radius (mm)

Fill in the required fields to see your result.

Key differences

	Torque and Power Calculator	Screw Torque Calculator
Category	Mechanical	Mechanical
Inputs required	4	3
Result	Result (kW)	Required Torque (N⋅mm)
What it does	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.	Calculates the torque needed to clamp a fastener to a target axial force, accounting for thread geometry and friction. Use it when tightening critical bolted joints to avoid under- or over-torquing.