Spring Rate Calculator (Helical Compression)

This tool is designed for reference purposes only in order to help determine an approximate rate of existing unmarked helical round wire compression coil springs. There are many variables which are not represented in in these calculations, therefore results are estimates and may vary.

Standard Metric

Estimated Spring Rates (for reference only)

Wire Diameter (in)

Inside Diameter (in)

Number of Coils

Spring Rate (lbs/in)

Spring Rate (N/mm)

Spring Rate (kg/mm)