Compression Spring Designer
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 Calculator
 This calculator computes all parameters (spring rate, maximum load, maximum stress, solid height, coil pitch, coil angle, wire length, resonant frequency, shear modulus, and spring mass) related to a compression spring from basic geometry and material data input. In determining the total number of coils in the spring, the calculator assumes that the ends of the spring are squared.
Inputs
 Diameter of spring wire, d: mm cm in Outer diameter of spring, Douter: mm cm in Free length of spring, Lfree: mm cm in ft Number of active coils, na: Youngs modulus of material, E: GPa Mpa psi ksi Poisson ratio of material, n: Density of material, r: kg/m^3 g/cc lbm/in^3