Elastic Potential Energy Calculator
🛹 Work, energy & power. Use the Elastic potential energy formula to find energy stored, spring constant k, extension x: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Energy stored | J |
| Spring constant k | N/m |
| Extension x | m |
Worked example
Find the energy stored when Spring constant k = 40 N/m, Extension x = 0.15 m.
Using Ee = 1/2kx²: Energy stored = 0.45 J.
Frequently asked questions
What is the formula for Elastic potential energy?
Ee = 1/2kx².
What do the letters stand for, and what units are used?
Energy stored in J, Spring constant k in N/m, Extension x in m.
How do you calculate energy stored?
Put the values into Ee = 1/2kx². For example, with Spring constant k = 40 N/m, Extension x = 0.15 m, energy stored = 0.45 J.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (energy stored, spring constant k, extension x) and fill in the others: it rearranges the formula for you.
