CoopCalcs exists because backyard chicken advice lives in two frustrating places: forum threads where the answer is buried on page 14, and generic calculator sites that treat a Silkie and a Jersey Giant as the same bird.
We build focused, free calculators for the practical questions every keeper faces — how big to build, how much feeding costs, what laying to expect, and when the eggs will hatch. Each tool documents the assumptions and formulas behind it, uses the baselines experienced keepers and poultry extension services agree on, and adjusts them for breed size, climate, season, and management instead of pretending one number fits every flock.
Everything on CoopCalcs is free, requires no account, and works on any device. The site is supported by advertising.
A note on accuracy
Our calculators produce planning estimates, not veterinary or engineering advice. Individual birds, local climates, and specific situations vary — when your flock's health is in question, consult a poultry vet. If you spot an error in our numbers, we genuinely want to know.
Contact
Questions, corrections, or tool suggestions: [email protected]