Approximate Coil Spring Rates

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Wire Diameter in inches (decimal):  

Number of Active Coils (One side):

Lay the spring down sideways and start where the coils are independent and then count one side.

Average Coil Diameter :

Center of the coil on one side to center of the coil on the other side (farthest center point).

The Coil Spring Rate is Approximately:          lbs. 

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