The Compression spring calculator has been developed to calculate compression springs
design parameters with the knowledge of design type (one load & free height, one load & spring rate, two loads), compression spring wire diameter, spring diameter, spring free height, loads at specific heights, compression spring end type and material selection. Material selection of compression springs can be done from listed spring steels including music wire, stainless steel wire, chrome vanadium, etc.
Calculation results generated by the compression springs calculator are solid height, torsional
shear stress at solid height, factor of safety against yielding, buckling check,
spring outer diameter expansion, load-deflection curve, stress–deflection curve, spring
index.

This calculator can be used to design statically loaded compression springs. For compression springs
which work under cyclic loading, first use this calculator for the sizing
according to static loading and then visit "Critical Frequency of Helical Springs" and "Stress Analysis of
Coil Compression Springs for Fatigue Loading" calculators to check the compression spring design against cyclic loading.

The formulas and parameters used in the calculator are given in the "Supplements " section of this page.