It looks like you're new here. If you want to get involved, click one of these buttons!
The formula is simple, yet surprisingly accurate and predictive of real world results.
The formula goes as follows:
(Height in centimeters - 100) = Body weight in kilo ("shredded", i.e. 5-6% body fat).
Example: If your height is 180 cm (5'11), subtract 100 and you get 80.
80 kg (176 lbs) is your maximum muscular potential when you are in peak condition; rock hard abs with visible veins running across them, striated arms and delts, and so forth. Scroll down a bit to see examples of what I mean.
Now, the inquiring mind would probably like to know why I determine the formula by "ripped" body weight and not something a little more moderate like 10-12% body fat. 10-12% body fat is still lean and a great look if you've got some muscle behind that.
Well, the reason is that competition day body weight is the best standard to use. If you want to predict maximum muscular potential with any reasonable precision, you need to have some kind of equalizer. Saying you can get to this and that body weight without drugs doesn't mean anything unless you consider the body weight in relation to height and body fat percentage. On competition day, most guys are typically in a fairly tight interval of body fat percentage (4-6%) which makes this a good standard.
Furthermore, competitors usually have years of consistent training behind them, which makes another case for drawing conclusions based on competition weight.