Moment of Inertia of the Pendulum Formula

Equation for calculate moment of inertia of the pendulum is,

$I_p=\frac{m·g·r·t^2}{4·{\pi }^2}$

where,
m = Mass of the object
g = Local acceleration of gravity 9.80665 m/s²
r = Distance from the pivot point to the centre of mass of the object
t = Time duration of oscillation
π = pi (3.141592653589793)
I_p = Moment of inertia of the pendulum