Quick answer: Plan 4 sq ft per chicken inside the coop and 10 sq ft per chicken in the run. Bantams need about half; large breeds like Brahmas need more. Add 8-10 in of roost per hen and 1 nesting box for every 4 hens. Use our chicken coop calculator to get your exact numbers.
Space is the most underestimated part of keeping chickens. Crowded hens peck each other, get sick more often, lay less and make the coop dirty faster. The good news: the rules are simple, and once you know them you can check any coop before you buy it.
Space per chicken
| Breed size | Inside the coop | Run | Roost |
|---|---|---|---|
| Bantam | 2 sq ft | 5 sq ft | 6 in |
| Standard (most hens) | 4 sq ft | 10 sq ft | 8-10 in |
| Large (Brahma, Jersey Giant) | 6 sq ft | 15 sq ft | 12 in |
Quick chart for standard hens
| Hens | Coop (min) | Run (min) | Nesting boxes |
|---|---|---|---|
| 2 | 8 sq ft | 20 sq ft | 1 |
| 4 | 16 sq ft | 40 sq ft | 1 |
| 6 | 24 sq ft | 60 sq ft | 2 |
| 8 | 32 sq ft | 80 sq ft | 2 |
| 10 | 40 sq ft | 100 sq ft | 3 |
| 12 | 48 sq ft | 120 sq ft | 3 |
These are minimums. If your hens stay in the run all day, give them more. If they free-range, the coop can be a bit smaller.
Why manufacturers overestimate
- Coop labels like “for 4-6 chickens” often count bantams or assume hens are only inside to sleep.
- Measure the floor yourself: length x width, and do not count the nesting box or ramp.
- If the run is part of the coop, check that the run alone meets 10 sq ft per hen.
Signs your coop is too small
- Feather pecking or bald spots.
- Fights at the feeder or on the roost.
- Wet, smelly bedding even after cleaning.
- Fewer eggs than expected.
If you see these, add a bigger run, let them free-range under supervision, or reduce the flock. Our guide to the best coops for 4 chickens shows which kits are really big enough.
馃憠 Calculate your exact numbers with the chicken coop size calculator.
FAQ
How many square feet does a chicken need?
About 4 square feet inside the coop and 10 square feet in the run for a standard-size hen.
How many chickens can I keep in a 4×8 coop?
A 4×8 coop is 32 square feet, enough for about 8 standard hens inside, as long as they have at least 80 square feet of run.
Do chickens need a run if they free-range?
Yes, ideally. A secure run keeps them safe when you are away or when predators are around.
How high should the roost be?
Between 18 and 36 inches off the floor, and higher than the nesting boxes so hens do not sleep in them.