Compression Spring Calculator

Calculate spring rate, stresses, deflections, and safety factors for helical compression springs

Wire & Coil Geometry

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End Type

Material

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Design looks good
Safe
4.897
Spring Rate (N/mm)
120.6
Wahl Stress (Operating) (MPa)
5.97
Safety Factor (-)
COMPRESSION SPRING — SIDE VIEWLsF = 20 NLf = 50.0 mm45.9 mmδ = 4.1SF = 5.97> 21.25 - 21 - 1.25< 1d = 2.0 mmD = 16.0 mmNa = 8Ls = 20.0 mmk = 4.90 N/mm

Force vs. Deflection

δ = 4.08 mmF = 20.0 Nτ = 120.6 MPa
Slope: 4.90 N/mm
Operating rangeNear solid heightSolid height (Ls)

Created by Catlynn Nguyen & Jie Chai · 2026