I have 8 golden buffs comming coop measurements

Much easier for people to decipher by posting length and width. To many variables on what the length and width could be with posting the inches.

If your coop is only 13 square feet than you may have issues with having 8 chickens in there once they are grown. My brooder for example is 3 feet by 5 feet making a total square footage of 15 square feet. <--- easier way to understand what the coop may look like if posted like the example.

 

Using my conversion software 7625.5 square inches equals about 53 sqft divided by 8 chickens equals about 6.5sqft per bird.

But yeah, giving the width and length in feet or inches would help confirm your calculations.


Which is pretty good for 8 chickens....but I wouldn't go with more birds, especially if you live in a climate where they may be confined to the coop for days on end in the winter.

 

I think the OP is confusing terms.

A square foot is 144 square inches, and hes dividing by 576, which is 4 square feet - I think the "13 square feet" hes talking is really something like "13 bird-square-foot-units".

To the OP - 8 birds should be fine unless you get some really nasty ones. More might be fine, but it's all going to depend on the individual personalities and what other access they have.