Spring Force Calculator

Use F = kx and E = ½kx² from spring constant and displacement.

Spring constant k (N/m)

Displacement

—force magnitude N

—elastic energy J

—force lbf

—displacement cm

—Hooke’s-law idealization: |F| = k|x|, E = ½kx².

These are idealized classical-physics calculations. Real systems can differ because of air resistance, friction, deformation, measurement uncertainty, non-constant forces, or other effects not included in the selected model.

How to use this Spring Force Calculator

Calculate ideal spring force and elastic potential energy from Hooke’s law. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.