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I'm learning some of General Relativity topics but still im a beginer, uh! i use the Schutz "A first course of general relativity", but i a little confused about the units, the author say it use c = G = 1 all around the book.

Just right now i reading chapter 11: Schwarchild Geometry and Black Holes". especifically "Conserved quantities" unit, and there, there is a couple of graphs V(r) vs r and in both graphs the root is "r = 2M" where M is the mass of the Schwarchild Black Hole, so my question is how i recover the original lenghts units? i mean if M =1000M(Sun) then i cant say the distance r is 2000M(Sun).

Thanks in advance

(Sorry if a silly question )

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# B Help with units here

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