What this calculator does
Poisson's Ratio works out how much a material bulges sideways when stretched or squeezed lengthways. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
Formulaν = −ε_trans / ε_axial; E = 2G(1+ν)
The inputs explained
| Field | What to enter |
|---|---|
| Axial strain (ε_axial) | A number. Starts at 0.002. |
| Transverse strain (ε_trans) | A number. Starts at -0.0006. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with axial strain (ε_axial)
Every other input is held at the calculator’s starting values while axial strain (ε_axial) varies. Select any row to load that scenario into the calculator.