How to use the axial stress and strain calculator
Find stress, strain and elongation of a bar under a tensile or compressive load. Enter axial force, cross-section area, original length, elastic modulus in the fields above; the stress, strain, elongation are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “stress in a rod”, “elongation of a bar”, “tensile stress and strain”, “calculate axial stress and strain”, “find stress”.
Formula
Variables
- F — Axial force (kN)
- A — Cross-section area (mm²)
- L — Original length (m)
- E — Elastic modulus (GPa)
Worked example
With axial force = 50 kN, cross-section area = 100 mm², original length = 2 m, elastic modulus = 200 GPa, the calculator gives stress ≈ 500 MPa; strain ≈ 0.0025; elongation ≈ 5 mm.
Frequently asked questions
What is the axial stress and strain calculator used for?
Find stress, strain and elongation of a bar under a tensile or compressive load. It helps with questions such as “stress in a rod”, “elongation of a bar”, “tensile stress and strain”.
What is the formula for the axial stress and strain calculation?
Stress (MPa) = F × 1000 / A. Strain = [Stress] / (E × 1000). Elongation (mm) = [Strain] × L × 1000. Here F is axial force (kN), A is cross-section area (mm²), L is original length (m), E is elastic modulus (GPa).
What inputs do I need for the axial stress and strain calculator?
You need axial force in kN, cross-section area in mm², original length in m, elastic modulus in GPa. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the axial stress and strain calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the axial stress and strain result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.