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Spring Rate Calculator

Calculate the rate, deflection, solid height and stress of a helical compression spring from its wire and coil dimensions.

Works in BrowserInstant
mm
mm
turns
mm
N
Spring Rate

💡 Uses the standard helical spring formula k = Gd⁴/(8D³n) with the Wahl curvature correction on stress. Assumes a round-wire compression spring in its linear range. Check buckling for long springs and fatigue life for cyclic loading.