What is the black hole equation?

The equation for a black hole is Rs = 2MG/c^2. "Rs" is the Schwarzschild radius, "m" is the mass of the object, "G" is the gravitational constant of 6.672*10^-11, and "c" is the speed of light in a vacuum.

A black hole is an object that has, due to gravity, collapsed to a single point and exudes so much gravity within its event horizon that even light cannot escape. The Schwarzchild radius is the radius of this event horizon, and is determined by the mass of the object. If the mass of the object is somehow compacted to this radius, it collapses into a black hole. The Earth, for example, has a Schwarzschild radius of about 9 millimeters.