# Poisson's Ratio Calculator

The SkyCiv Poisson's Ratio calculator allows engineers to calculate the Poisson's Ratio of a material. This value can be calculated by two options. The first option is entering Transverse and Axial Strain. The second option is by using Young's Modulus and Shear Modulus.

**About the Poisson’s Ratio Calculator**

## What is Poisson’s Ratio?

Poisson's ratio is a fundamental material property that characterises the relationship between transverse (lateral) strain and axial (longitudinal) strain when a material is subjected to an external force. It quantifies the material's ability to expand or contract laterally in response to applied tensile or compressive forces.

## What does Poisson’s Ratio Measure?

Poisson's ratio measures the ratio of transverse strain to axial strain within a material under the influence of external loads. This property is crucial in understanding how a material deforms in different directions and helps engineers predict its behaviour under various mechanical loading scenarios.

## How is Poisson’s Ratio Calculated?

Two distinct methods which can be used to calculate Poisson’s Ratio (v) include:

- Transverse Strain & Axial Strain
- Young’s Modulus & Shear Modulus

Poisson’s Ratio (v) can be calculated using Transverse Strain and Axial Strain with the formula:

Poisson's Ratio (ν) can be calculated using Young's modulus (E) and Shear modulus (G) with the formula:

This formula can be rearranged to solve for Poisson’s Ratio (v):