Calculate the energy stored in a spring or elastic material when compressed or stretched.
Spring Parameters
Energy Results
Enter spring constant and displacement
About this calculator
Quick Reference
kSpring constant (stiffness)
xExtension or compression
UStored elastic energy
FRestoring force (kx)
Overview
Elastic potential energy is the energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring.
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Pro Tips
Formula: U = 0.5 * k * x².
The SI unit for energy is the Joule (J).
Spring constant (k) is measured in Newtons per meter (N/m).
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Fun Facts
"Stiffer springs (higher k) store more energy for the same displacement."
"The energy increases with the square of the displacement, meaning doubling the stretch quadruples the energy."
