Extension Spring Rate "k" Constant Calculator

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This calculator will calculate (estimate) the Spring Rate (k) of a extension spring. Spring rate is best determined by test and measurement techniques.

See the equations behind this calculator:
Extension Spring Rate "k" Constant Formula

Extension Spring Constant Calculator
Design Variables
Modulus of Rigidity (G) =
Wire Diameter, inches (d) =
Number of Active Coils (n) =
Mean Coil Diameter, inches (D) =
Results
Spring Constant (k) =

Automatic recalculation 

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