Minuteman Spring Company, Inc.Minuteman
Springs

Free Engineering Tools

Free Spring Rate & Load Calculators

Free engineering calculators for compression springs, extension springs, and torsion springs. Estimate spring rate, load, stress, and geometry in real time — then request a same-day quote from Minuteman Spring Company.

Engineering Tools

Spring Calculators

Use our free spring engineering calculators to estimate spring rate, load, stress, and geometry for your application. Results update in real time as you adjust parameters.

Need a production-ready quote based on your results?

Request a Quote

Compression Springs

Calculate spring rate, solid height, max load, and stress for helical compression springs.

Enter the spring geometry and material below. Results calculate automatically. All dimensions in inches, forces in pounds (lb).

Compression spring diagram

Calculated Results

Mean Diameter (D)
0.6700 in
Inner Diameter (ID)
0.5900 in
Spring Index (C)
8.375
Optimal range 4–12
Active Coils (Na)
8.0
Solid Height (Ls)
0.8000 in
Max Deflection
1.2000 in
Pitch (p)
0.2300 in
Wahl Factor (Kw)
1.1751

Load & Stress

Spring Rate (k)
24.471 lb/in
Max Load at Solid
29.37 lb
Max Torsional Stress
115.0 kpsi

Spring index is within optimal range (4–12). This design is manufacturable with standard tooling.

Engineering Disclaimer: These calculations are provided as a general design guide based on standard spring engineering formulas. Results are approximate and do not account for all real-world factors such as fatigue life, temperature effects, or surface conditions. Always consult a qualified engineer before finalizing a design for production.