# Elastic Modulus in Physics | Definition, Formulas, Symbol, Units – Elasticity

Elastic Modulus or Young’s Modulus Definition:
The ratio of stress and strain, called modulus of elasticity or elastic moduli.

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## Elastic Modulus in Physics | Definition, Formulas, Symbol, Units – Elasticity

Elastic Modulus formula:
The modulus of elasticity is simply stress divided by strain:

E = $$\frac{σ}{ε}$$

Where,
E is Young’s Modulus
σ is the uniaxial stress or uniaxial force per unit surface
ε is the strain, or proportional deformation (change in length divided by original length); it is dimensionless

Elastic Modulus Dimensional Formula:

[ML-1T-2]

Elastic Modulus Unit:

• SI Unit is pascals (Pa)
• The practical units are megapascals (MPa) or gigapascals (GPa or kN/mm²).

Elastic Modulus Symbol:
Elasticity modulus or Young’s modulus (commonly used symbol: E) is a measure for the ratio between the stress applied to the body and the resulting strain.

Elasticity:
Elasticity defines a property of an object that has the ability to regain its original shape after being stretched or compressed. Learn about the deforming force applied on an elastic object and how the stress and strain works on an object. What is a Hooke’s law and how it is applicable for the concept of elasticity.