Spring Constant Calculator

Hooke's Law states that the force needed to extend or compress a spring is proportional to the displacement. The spring constant k (measured in N/m) quantifies the spring's stiffness — a higher k means a stiffer spring requiring more force per unit of extension

The calculator uses the standard published formula for spring constant. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: F = k × x (Hooke\'s Law). Each step in the calculation is shown so you can verify the result manually.