# The Gauss's law for gravitational field and the unit system

Here $g$ is the gravitational field, $G$ is the gravitational constant, and $M$ is the total mass in the volume $V$. I wonder if this formula holds for any unit system. That is, does the coefficient $4\pi$ hold true for any unit system such SI or cgs? The maxwell equations change their form with the unit system given. So I am confused.

• In gravitational physics research, it is actually just as common (if not more common) to set $8 \pi G = 1$, which greatly simplifies the Einstein equation. – Michael Seifert Feb 24 '18 at 23:38