Hooke's Law Calculator
Linear spring force F = k x. Default k = 100 N/m and x = 0.01 m gives 1 N. Informational, not a spring rating, wiring approval, or code approval.
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How to use Hooke's law calculator
- Enter any two of k, x, and F. Leave the unknown blank.
- k is newtons per meter. x is meters from the unloaded length. F is newtons.
- Read the missing value from F = k x. The default k and x produce 1 N.
- This is the linear range only. Nothing is uploaded.
Hooke's law
F = k x
| F | Restoring force in newtons |
|---|---|
| k | Spring constant in N/m |
| x | Displacement from equilibrium in meters |
| Default | 100 N/m and 0.01 m produce 1 N |
| Range | Linear ideal spring. No coil bind. |
| Force units | Convert N and lbf on the force converter |
What Hooke's law is here
In the linear range, force is proportional to extension or compression: F = k x. k is newtons per meter. x is meters from the unloaded length. 100 N/m times 0.01 m is 1 N.
Spring constant, displacement, and the newton
k is stiffness, not the load rating printed on a catalog spring. x is displacement, not the free length. A newton is the SI force unit. Change N and lbf on the force converter. Moving-mass energy is kinetic energy.
How this page computes
Enter exactly two of F, k, and x. The page solves the third from F = k x. k must be greater than 0 when you use it. The model is a single ideal spring along one axis. It does not add gravity, damping, or series/parallel networks.
Limits
Real springs yield, buckle, and heat. Informational, not a spring rating or code approval. CZNull does not receive k or x. See the disclaimer.