Direct Stress and Strain Calculator
Enter axial force F, cross-sectional area A, elastic modulus E, and original length L in consistent N, m², Pa, and m units.
A QUICK WALKTHROUGH
How to use this tool
- Enter finite axial force; area, elastic modulus, and length must be positive.
- Review stress, strain, elongation, and axial stiffness.
Formula and source
σ = F/A; ε = σ/E; δ = FL/(AE); k = EA/L. Source: MIT OpenCourseWare, Mechanics and Materials I, Lecture 9: https://ocw.mit.edu/courses/2-001-mechanics-materials-i-fall-2006/dfbefba09e533f1349690e6e410d5524_lec9.pdf
Input limits and scope
Finite F; A>0, E>0, L>0. Inputs use N, m², Pa, m. Outputs are stress (Pa), dimensionless strain, elongation (m), and stiffness (N/m). Uniform axial load, linear elasticity, and small deformation are assumed; the tool does not verify elastic-range behavior or allowable stress.
GOOD TO KNOW
Common questions
Does this check allowable stress?
No. It is not design approval or a safety determination.
Are material defaults included?
No. Enter the elastic modulus for the specific material and conditions.