# How does one convert the stress energy momentum tensor into a normal energy value?

In the case of the Einstein field equations, is it possible to change from the stress energy momentum tensor into a normal energy value? Is it possible to say 'E =' instead of the Einstein constant multiplied by the SEM tensor?

This is in trying to find the curvature of spacetime in response to an object's energy/mass.

• Related question by the same OP: physics.stackexchange.com/q/523982 Jan 28, 2020 at 6:57
• Some physical quantity, and the density of that quantity, are two different things. Think about mass density. You can have a little mass of a low-density substance, a lot of mass of low density, a little mass of high density, or a lot of mass of high density. So why do you expect some relationship between energy and energy density when you don’t specify the volume? Jan 28, 2020 at 7:02
• If you specify, for example, a spherical mass of uniform density with some radius, you can calculate the metric tensor and the curvature tensor everywhere. Jan 28, 2020 at 7:04
• en.wikipedia.org/wiki/Interior_Schwarzschild_metric Jan 28, 2020 at 7:07
• If you want to chat, I have some time. Jan 28, 2020 at 7:13