πŸ” Chicken Coop Size Calculator

Get exact sizing for your coop, run, nesting boxes, and roosts β€” factoring in breed, climate, and how much they free-range. With a live 3D preview.

Or browse 18 chicken breeds with photos β†’

Tell us about your flock

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Housing method

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βœ“ Why people choose this
  • β€’Most space-efficient per bird
  • β€’Easy to clean (you walk in)
  • β€’Strongest predator protection
  • β€’Works in any climate
⚠ Tradeoffs
  • β€’Run gets stripped of grass quickly
  • β€’Birds don't access fresh forage
  • β€’Largest construction project
  • β€’Permanent β€” hard to relocate
Best for: Anyone with a fixed flock location and 50+ sqft to spare

Live 3D preview

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Showing: Walk-in coop with run Β Β·Β  Rectangle dimensions are suggestions β€” total sqft is what matters.

Your coop & run requirements

🏠Coop interior
24sqft
~4β€² Γ— 6β€²
🌿Run / outdoor
60sqft
~6β€² Γ— 10β€²
πŸ₯šNesting boxes
2boxes
1 per 3–4 hens
πŸͺ΅Roost length
5ft
60β€³ total
πŸ’¨Ventilation
3sqft
above roost height
🌾Feed needed
39lbs/mo
layer feed
πŸ’§Water capacity
0.8gal/day
more in summer
For 6 standard birds:
  • Always use 1/2β€³ hardware cloth, never chicken wire, on all openings.

Recommended supplies for your flock

Sized to your inputs above. Links open Amazon in a new tab.

Coop
PawHut 137β€³ Split-Level Coop (8–10 birds)
Sized for your 6-bird flock at 24 sqft. Most-reviewed mid-tier coop on Amazon β€” split-level with attached run.
View on Amazon β†’
Run
1/2β€³ Hardware Cloth (50+ ft rolls)
You need ~39 linear ft. Predator-proof β€” chicken wire will not stop a raccoon. Compare current 50-ft rolls.
View on Amazon β†’
Nesting
Best Nest Box β€” Reversible Rollout (Medium)
You need 2 boxes. The "gold standard" rollout β€” eggs roll out clean onto a pad, no pecking, no broken eggs.
View on Amazon β†’
Roosting
Heavy-duty roost-bar brackets (use with 2Γ—4 lumber)
6 birds need ~5 ft of roost. A flat 2Γ—4 wide-side-up keeps feet warm in winter; brackets mount it; lumber is cheap locally.
View on Amazon β†’
Feeding
Grandpa's Standard Treadle Feeder (20 lb)
Your flock eats ~39 lbs/mo. Grandpa's is the original NZ-made treadle β€” 20+ years on the market, the only one BYC moderators endorse.
View on Amazon β†’
Watering
RentACoop 2-Gallon Horizontal Nipple Waterer (4-port)
~0.8 gal/day. Horizontal nipples don't drip, work in cold weather, and the dribble dishes prevent waste.
View on Amazon β†’
Convenience
Run-Chicken T50 Automatic Coop Door
Ranked #1 in 2026 head-to-head tests β€” easiest install (under 20 min), AA batteries last 1+ year, anti-pinch motor.
View on Amazon β†’
Bedding
Large-flake kiln-dried pine shavings
For 24 sqft of coop floor. Tractor Supply's Producer's Pride bale is the cheapest option locally β€” Amazon's premium brands work too.
View on Amazon β†’
Health
Harris Diatomaceous Earth Food Grade (10.5 lb + duster)
OMRI-certified, includes a duster applicator. Use in dust baths and sprinkle in nesting boxes for mite/lice control.
View on Amazon β†’
Security
Spring-bolt latch + locking carabiner combo
Raccoons defeat any one-handed latch. The standard recipe is a spring bolt + secondary locking carabiner β€” two motions, two hands.
View on Amazon β†’
Security
316 Stainless Locking Carabiners (pair with bolt above)
Marine-grade stainless. Use as the secondary lock on every coop and run access point.
View on Amazon β†’
As an Amazon Associate this site earns from qualifying purchases. Recommendations are sized to your flock and based on standard backyard chicken-keeping practices.

Frequently asked questions

The standard rule is 2–4 sqft of coop interior plus 8–10 sqft of run per standard-sized hen. Bantams need less (about 2 sqft coop, 5 sqft run); Jersey Giants and Brahmas need more (5+ sqft coop, 12+ sqft run). Cold climates push the coop number up because birds spend more time inside during winter.