Science & engineering
Spring energy calculator
Calculate elastic potential energy stored in an ideal spring.
A clear answer. Here’s how.
Stored elastic energy E = kx²/2 in joules. Uses displacement from the equilibrium position and an ideal constant spring stiffness. Compression and extension of equal magnitude store equal energy in this model.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Spring constant (N/m)
- 200
- Signed extension from equilibrium (m)
- 0.05
Example result
- Stored energy (J)
- 0.25