# Energy density of gravitational field [duplicate]

Can we define the energy density of gravity field? If so, what is the formula, and the newtonian approximation? In newtonian mechanics, we can easily obtain the gravitational potential energy. But if the mass gets bigger, and is necessary to use GR, things gets more complicated. What is the potential energy in this case? I am not well-aware about tensor or those sort of things, so please explain in easy words.