I'm sorry you're not feeling well today; but there really is no single One True Answer.
It just depends on what you're after.
It is popular on BYC to cite "4 sq ft per chicken indoors, plus 10 sq ft per chicken outdoors" as some sort of mystical number. Other groups of chickenkeeping people have their own somewhat-different mystical numbers. So if you want to join a religion, so to speak, take your pick and just go with it
But in reality, it depends a lot on two things. First, your climate. If you have cold snowy winters, it tends to work best to give more rather than less indoor space, as it's easier to maintain good air quality (avoid frostbite) and reduces the chances of cannibalism/pecking when nobody wants to go outdoors for weeks at a time. If you live on Maui, you may not need any more indoor space than just a sheltered roost.
And second, your aims. If you are trying to keep the largest possible number of chickens alive in the smallest possible space without feeling like you are just duplicating a battery-hen situation, then the main concerns are keeping the odds of cannibalism reasonably lowish and not making sanitation any more difficult than you, personally, feel like keeping up with. With the right breeds and a certain amount of luck you can pack a fair number of chickens into a fairly small space and still have them lay eggs for you. OTOH they really do behave differently with a lot more space than the BYC "4/10" allowance, plus which management is MUCH easier.
So you just have to decide what suits you best.
Good luck, have fun,
Pat, who has tried various different stocking densities and having seen how much of an effect it has on their behavior I will never go back below 10-15 sq ft per chicken indoors PLUS ample run... but that's just me.