Hello Nicholas,

If you are at 10% body fat then it is ok to multiply by the bodyweight.  If you are above 10%, then using your lean body mass is the best way to determine your macronutrient intake.

Best!

-HR

Author Bio

Hugo Rivera, CFT, SPN, BSCE and About.com Bodybuilding Guide is a lifetime natural bodybuilder, multi-certified personal trainer, industry consultant and fitness expert who not only knows training and nutrition theory but also applies it on a daily basis as evidenced by the fact that he is always in shape and by his awards and high placings at numerous national level bodybuilding competitions.  He is also an internationally known best selling fitness author with a very successful franchise of books called "The Body Sculpting Bibles" which collectively have sold over a million copies. 

Hugo is also author of the very popular "Body Re-Engineering" e-book which teaches how to gain lean mass and get lean without drugs, or fancy expensive supplements, using the secrets he devised after many years of weight problems as a child.  This system can be used not only by the recreational or competitive bodybuilder but also by those who are simply looking to lose weight and get fit. 

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