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Size My Coop

Free calculator

Chicken Coop Size Calculator

Enter your flock size and breed size. You’ll get coop and run space, roost bars, nest boxes, and how much feed and water to plan for each week.

Breed size
Coop floor space24 sq fte.g. 4 × 6 ft
Run space60 sq fte.g. 6 × 10 ft
Roost bar length5 ftTotal, can be split across bars
Nest boxes2About 1 per 4 hensOur nest boxes pick →
Feed per week~10.5 lbMore in cold weatherOur feeders pick →
Water per day~0.8 galMore in hot weatherOur waterers pick →
Eggs per week~24≈ 2 cartons a weekOur egg cartons pick →

These are common backyard rules of thumb, not legal requirements. More space is better when you can give it. Check your city or HOA rules on flock size and roosters before you build.

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Frequently asked questions

Is a bigger coop always better?

Within reason. More space reduces pecking and stress, but in cold climates a very large coop is harder for hens to keep warm. Good ventilation matters more than size.

Should I heat my chicken coop?

Most cold-hardy breeds do fine without heat if the coop is dry and draft-free with good ventilation. Heat lamps are a common cause of coop fires.

How many eggs will my hens lay?

It varies a lot by breed, age, season and daylight. Many backyard layers average a few eggs per week each, with fewer in winter and during molt.