Compression spring calculator
Wire + coil dia + coils + force → rate, deflection, shear stress (Wahl).
How to use
- Enter the calculation conditions
Enter the dimensions, loads, speeds or operating conditions requested by the form.
- Run the calculation
The tool applies the formulas shown on this page to the entered values.
- Review the result
Review the resulting specification and checks, then verify them against the cited source, current standard and real operating conditions before use.
Core formula
C = D/d; k = G · d⁴ / (8 · D³ · n)
Example using default values
C = 24/3; k = 78,500 · 3⁴ / (8 · 24³ · 8) → C = 8; k = 7.19 N/mm
Source: Shigley Mechanical Engineering Design / JIS B 2704.
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