Compression Spring Design Calculator

Calculate spring rate, shear stress, deflection, and safety factor for helical compression springs. Toggle Show Work to see every formula step.

Inputs

Wire diameter (d)

Mean coil dia (D)

Active coils (Na)

Free length (L_free)

End type

Material

Applied force (F)

Spring Rate (k)

4.987N/mm

Spring index (C)

8.00ideal rangePASS

Deflection (\u03B4)

20.054mm

Shear stress (\u03C4)

603.0MPa

Solid length

20.00mm

Solid force

149.6N

Buckling (L_free/D)

3.13≤ 4PASS

Safety factor

1.03WARN

Weight

12.4g

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