Poisson's Ratio Calculator

Calculate Poisson's ratio from strain measurements and explore Poisson's ratio values for common materials. Poisson's ratio describes the relationship between transverse strain and longitudinal strain when a material is deformed.

Poisson's Ratio Calculator

Poisson's ratio (μ) is the ratio of transverse strain to longitudinal strain when a material is deformed:

μ = - εt / εl

Where:

εt = transverse strain (lateral contraction)
εl = longitudinal strain (axial extension)

For most common materials, Poisson's ratio ranges from 0 to 0.5.

Calculator

Inputs

Transverse Strain (εt) (m/m)

Longitudinal Strain (εl) (m/m)

Results

Poisson's Ratio (μ)-- dimensionless

Material	Poisson's Ratio (μ)
Upper limit	0.5
Aluminum	0.334
Aluminum, 6061-T6	0.35
Aluminum, 2024-T4	0.32
Beryllium Copper	0.285
Brass, 70-30	0.331
Brass, cast	0.357
Bronze	0.34
Clay	0.41
Concrete	0.1 - 0.2
Copper	0.355
Cork	0
Glass, Soda	0.22
Glass, Float	0.2 - 0.27
Granite	0.2 - 0.3
Ice	0.33
Inconel	0.27 - 0.38
Iron, Cast - gray	0.211
Iron, Cast	0.22 - 0.30
Iron, Ductile	0.26 - 0.31
Iron, Malleable	0.271
Lead	0.431
Limestone	0.2 - 0.3
Magnesium	0.35
Magnesium Alloy	0.281
Marble	0.2 - 0.3
Molybdenum	0.307
Monel metal	0.315
Nickel Silver	0.322
Nickel Steel	0.291
Polystyrene	0.34
Phosphor Bronze	0.359
Rubber	0.48 - ~0.5
Sand	0.29
Sandy loam	0.31
Sandy clay	0.37
Stainless Steel 18-8	0.305
Steel, cast	0.265
Steel, Cold-rolled	0.287
Steel, high carbon	0.295
Steel, mild	0.303
Titanium (99.0 Ti)	0.32
Wrought iron	0.278
Z-nickel	0.36
Zinc	0.331