Universal Gravitational Constant(G) = 6.6726 x 10-11N-m2/kg2
In physics, Gravitational acceleration is the acceleration on an object caused by force of gravitation.
Gravitational Acceleration:
a = GM / r2
where, G = Universal Gravitational Constant = 6.6726 x 10-11N-m2/kg2, r is Radius from Planet Center, M is Planet Mass
For example, when Planet Mass(M) = 50000000000000kg, Radius from Planet Center(r) = 6000m, then Gravitational Acceleration(a) = 9.27m/s2.