Compression Spring Calculator

Easily calculate key spring parameters and performance characteristics for your custom compression spring design. This tool helps you determine force, stress, solid height, and other essential spring attributes based on your inputs.

Get Started

To begin, enter your known spring design specifications such as wire diameter, outside diameter, and free length. Select the material and end type, and the calculator will instantly provide critical performance metrics to help you validate or refine your design.

compression-spring

Input Parameters

00.000 in0.000

Calculated Outputs

Geometry

Mean Diameter0 in
Inside Diameter0 in
Spring Index (C)0
Active Coils0
Inactive Coils2
Active Coil Pitch0 in
Solid Height0 in
Max Deflection0 in

Stiffness

Spring Rate (k)0 lbf/in
Wahl Factor (K w)0

Performance at Solid Height

Deflection to Solid0 in
Force at Solid Height0 lbf
Stress at Solid Height0 ksi

Other Geometric Properties

Pitch0 in
Helix Angle0 degrees

At Current Deflection (0.000 in)

Compressed Length0 in
Load / Force0 lb
Torsional Shear Stress0 psi

Design Checks

Index OK (4–12)✗ Fail
No Coil Clash✓ Clear
Stress < 65 % Yield✓ Pass

This calculator provides estimates based on theoretical spring formulas and standard assumptions. Results are for preliminary design purposes only and should be verified by a qualified engineer for any critical applications. The calculator does not account for all factors affecting spring performance, including material variations, manufacturing tolerances, environmental conditions, or fatigue life.

Use at your own risk. This tool is not intended for applications where spring failure could result in injury, property damage, or system failure. Always consult appropriate engineering standards and conduct proper testing for your specific application.

Request a Custom Quote

Submit your quote request using the inputs and results from the spring calculator which are shown below. Our experienced engineering team will review your specifications and provide a detailed, personalized quotation.

No file chosen

Allowed types: JPG, JPEG, PNG, PDF

Maximum file size: 2 MB

If you have another file type, you can submit a quote request via email by visiting our Contact Us page.

Compression Spring Calculator Summary

Input Parameters

Unit of Measure: Imperial

Outside Diameter (in.): 0 in

Wire Diameter (in.): 0 in

Free Length (in.): 0 in

Total Coils: 0

Material Type: Music Wire (ASTM A228)

End Type: Squared & Ground

Calculated Outputs

Mean Diameter: 0 in

Inside Diameter: 0 in

Spring Index (C): 0

Active Coils: 0

Spring Rate (k): 0 lbf/in

Solid Height: 0 in

Deflection to Solid: 0 in

Force at Solid Height: 0 lbf

Stress at Solid Height: 0 ksi

Pitch: 0 in

Helix Angle: 0 degrees