Mechanical calculator

Spring Constant Calculator

Calculate stiffness using Hooke law.

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Calculator

Enter mechanical values

Select units beside each input. Results update automatically.

Mechanical

Result

About this calculator

How it works

Spring constant is force per unit displacement in the linear elastic range.

Formulas

Formulas used

Hooke law

F = k x

Spring constant

k = F / x

Worked example

Example calculation

Spring constant

120 N / 0.03 m = 4000 N/m

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

Spring constant

Linear stiffness of the spring.

Stored energy

Elastic energy stored at the entered deflection.

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

Spring Constant 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.