What is Dimensional Formula of Stress?

Stress is defined as force applied on area.

Mathematically,
Stress = Force / Area

Dimensional Formula of Force= M¹L¹T^-2 [Check how Dimensional Formula of force is derived]
Dimensional Formula of Area= M⁰L²T⁰[Check how Dimensional Formula of area is derived]

Putting these values in above equation we get,
Dimensional Formula of Stress = (M¹L¹T^-2)/(M⁰L²T⁰)

Dimensional Formula of Stress = M¹L^-1T^-2
SI unit of Stress is Nm^-2