Design work often becomes a calculation problem before it becomes a CAD problem. This page brings practical engineering calculators together in one place so you can check a design before sending it to manufacturing.
Mechanical Engineering Tools
Each calculator now has its own focused page with the formula, example, practical design notes and related engineering guides.
- Shaft Torque Calculator — calculate torque from power and RPM.
- Gear Ratio Calculator — calculate ratio from gear tooth counts.
- Engineering Unit Converter — convert mm and inches for CAD work.
Shaft Torque Calculator
Calculate torque from power and rotational speed.
Gear Ratio Calculator
Calculate gear ratio from driver and driven tooth counts.
Engineering Unit Converter
Convert millimetres to inches and inches to millimetres for everyday CAD work.
How to Use These Results
Use calculator results as a design check, not as a substitute for applicable standards, manufacturer data, engineering judgment or a complete verification calculation. For production parts, confirm material properties, loads, safety factors, tolerances and manufacturing constraints.