Compression Spring Design Calculator

Calculate spring rate, stress, deflection, and fatigue life for helical compression springs per ASME standards.

Diameter of the spring wire.
mm
Average diameter of the coil (OD minus wire diameter).
mm
Number of active coils contributing to deflection.
Operating force on the spring.
N
Spring steel: 79.3 GPa, Stainless: 69 GPa.
GPa

Results

Spring Index C-
Spring Rate-N/mm
Deflection-mm
Shear Stress (Wahl)-MPa
Wahl Factor-
References: SMI Handbook of Spring Design; ASME/ANSI standards