Physics

Poisson's Ratio Calculator

Find Poisson's ratio from lateral and axial strain.

Calculated Output

Poisson's ratio 0.3

Formula: ν = −lateral strain ÷ axial strain

Step-by-Step Breakdown

1. Values used:

2. Lateral strain = -0.0009

3. Axial strain = 0.003

5. Poisson's ratio = 0.3

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The math behind it

ν = −lateral strain ÷ axial strain. Most materials fall between 0 and 0.5.

−0.0009 lateral over 0.003 axial → ν = 0.3.

Can it be negative?

Yes — exotic auxetic materials get fatter when stretched.