# Units of Stress – Strength of Materials

Before finding the units of stress we must know what is stress and what is formula of stress. It is the formula of Stress through which we can

easily determines the Units of stress.

easily determines the Units of stress.

Since the stress is defined as the ratio of resisting force

or applied load to the cross section area. The formula of stress is given by

or applied load to the cross section area. The formula of stress is given by

Where,

P = Applied load on the body.

A = Cross section area of the body.

## Units of Stress

The units of stress depends upon the unit

of load (force) and unit of area.

of load (force) and unit of area.

**In MKS unit system**, the unit of load is kgf

and that of area is square meter (i.e. m2). So the unit of stress

becomes kgf/m2. And if the area is expressed in square centimeter

than the unit of stress is kgf/cm2.

**In the SI system of units**, the load is

measured in newton and the area measured in m2. So the unit of

stress is N/m2. When the area is expressed in cm or mm, than the

stress unit becomes N/cm2 or N/mm2.

1 N/m2 = 10-4 N/cm2

= 10-6 N/mm2

= 10-6 N/mm2

1 MN/m2 = 106 N/m2

= 102 N/cm2 = 1 N/mm2

= 102 N/cm2 = 1 N/mm2

1 N/m2 = 1 Pa

**Note:**Here

N = Newtons

m = metre

cm = centimetre

mm = millimetre

Pa = Pascal

This is all about the units of stress. If you find anything

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