Spring Force using Hooke’s Law Calculator
This CalcTown calculator calculates the spring force required to stretch/compress a spring to a particular length using Hooke's law.
*Please note that the displacement of the spring from its equilibrium will be positive if stretched and negative if compressed.
Spring Constant using Hooke’s Law Calculator
Note: The displacement of the spring from its equilibrium (xo) will be positive if stretched and negative if compressed.

Click here to view image
Where
F = Force required to stretch the spring
k = Spring Constant
x
0= The equilibrium position
x = The displacement of the spring from its equilibrium (Can be negative or positive, based on whether the spring is compressed or stretched)