How this calculator works
Enter spring constant (n/m), extension (m). CalcStack applies the displayed formula and reports each intermediate planning value with the units shown.
Formula / method
E = ½kx²
Worked example
A 250 N/m spring extended 0.15 m stores 2.8125 J.
Assumptions and limitations
The spring follows Hooke’s law over the entered extension.
Yielding, hysteresis, damping, coil mass and nonlinear spring behavior are excluded.