Mechanical calculator

Mechanical Power Calculator

Calculate shaft power in watts, kilowatts, and horsepower.

Use calculator View formulas FAQ

Calculator

Enter mechanical values

Select units beside each input. Results update automatically.

Mechanical

Result

About this calculator

How it works

Rotating mechanical power is torque multiplied by angular speed.

Formulas

Formulas used

Angular speed

omega = 2 pi n / 60

Power

P = T omega

Worked example

Example calculation

Power

50 N.m at 1800 rpm gives P = 9.425 kW

Guide

How to use this calculator

Enter the known machine, motion, power, or geometry values.
Select units beside inputs where unit menus are shown.
Use the highlighted result first, then review supporting values for design context.

Reference

What the results mean

Power

Rate of mechanical work transfer.

Angular speed

Rotational speed converted to radians per second.

Assumptions and limits

Before using the result

Calculations are simplified engineering estimates for idealized geometry and operating conditions.
Real systems may require efficiency, fatigue, slip, vibration, lubrication, thermal, tolerance, and manufacturer data checks.
Use applicable standards, safety factors, test data, and qualified engineering judgement for final machine design.

FAQ

Mechanical Power Calculator questions

Can I use different units?

Yes. Select the unit beside each input. The calculator converts values internally before solving.

Are these results suitable for final machine design?

Use the results for education, screening, and early design checks. Final designs should include verified data, safety factors, standards, fatigue, tolerances, and manufacturer guidance.

Why can real mechanical systems differ from the result?

Real systems include friction, slip, wear, vibration, misalignment, efficiency losses, and manufacturing variation.