🌀 Spring Calculator
Calculate spring force and stored elastic potential energy using Hooke’s Law.
What Hooke’s Law tells you
Hooke’s Law states that the restoring force of an ideal spring is proportional to how far it’s stretched or compressed: F = kx, where k is the spring constant (stiffness) and x is the displacement from the spring’s natural, relaxed length. The energy stored in the spring is PE = ½kx².
How this calculator works
Enter the spring constant, which describes how stiff the spring is, and how far it has been stretched or compressed from its resting length. The calculator multiplies these to find the force the spring exerts, and applies the elastic potential energy formula to find how much energy is stored in the stretched or compressed spring.
Hooke’s Law only holds within a spring’s elastic limit — stretch it too far and it will deform permanently or break, at which point this formula no longer applies. This calculator is for general educational and planning purposes.