What is the dimensional formula of stress?

The dimensional formula of stress is [M L⁻¹ T⁻²], which comes from stress = force ÷ area.

Dimensional formula of stress

The SI unit of stress is pascal (Pa).

Stress

[M L⁻¹ T⁻²]

Written in full: [M¹ L⁻¹ T⁻² A⁰ K⁰]

Stress = Force ÷ Area

Put in the dimensions of each part: [MLT⁻²] ÷ [L²] = [M L⁻¹ T⁻²].

The SI unit of stress is pascal (Pa).

These quantities have exactly the same dimensions, a favourite trick in JEE and NEET "which pair has the same dimensions" questions: