I'm going to repeat what I said in response to your question on the other thread so that all the information is in the same place.
The Usual Guidelines
For each adult, standard-sized hen you need:
- 4 square feet in the coop (.37 square meters)
- 10 square feet in the run (.93 square meters),
- 1 linear foot of roost (.3 meters),
- 1/4 of a nest box,
- And 1 square foot (.09 square meters) of permanent, 24/7/365 ventilation, preferably located over the birds' heads when they're sitting on the roost.
4 hens
- 16 square feet in the coop. 4'x4' is the only really practical build for this given the common dimensions of lumber.
- 4 feet of roost
- 40 square feet in the run. 4'x10' or 5'x8'. 6'x6' is a bit too small, 6'x8' is more generous and easier to build than 5'x8'.
- 4 square feet of ventilation. A 2'x2' window is theoretically enough, but in practice doesn't create any air FLOW so better to spread the venting around (and even better to exceed the minimums, especially in warm climates).
- 2 nest boxes, to give the hens a choice
6 hens
- 24 square feet in the coop. 4'x6' is the only really practical build for this given the common dimensions of lumber. If you can't walk into it, put the access door in the middle of the long side to make sure you can reach all areas of the coop because a stubborn chicken WILL press itself into/lay an egg in the back corner where you can't reach.
- 6 feet of roost
- 60 square feet in the run. 6'x10' or 8'x8'.
- 6 square feet of ventilation.
- 2 nest boxes, to give the hens a choice
The goal with the ventilation is to have the temperature and humidity the same inside the coop as out.
View attachment 3122300
Your measurements come out to just under 4 square feet per bird -- marginal on the suggested minimums, but doable if you choose your breeds wisely.
BUT, you live in Indiana.
That means that you'll lose the use of your run in the winter unless you put a roof on it.
This is a photo of 18-week cockerels in a 4x8 space to give you a good visual on what actual chickens look like in a known space. They are just slightly smaller than an adult hen of their breed (Blue Australorp).