About PeckCalc
PeckCalc is a free backyard chicken calculator hub. It answers the "how much" and "how big" questions chicken keepers ask — coop size, feed, eggs, brooder heat, hatching dates and more — with figures traced to university extension sources.
Who runs PeckCalc
John Walker is the founder of PeckCalc and has kept backyard chickens in Dallas, Texas since 2017. He started PeckCalc to give backyard keepers free calculators and guides with every figure traced to a university extension source.
What PeckCalc does
PeckCalc has 41 calculators and 1,010 guides covering the whole backyard chicken journey: planning a flock, building a coop, feeding, watering, hatching, brooding and keeping hens healthy. Every calculator runs entirely in your browser — nothing is uploaded, nothing is stored, and there is no account to create.
Where the figures come from
The figures come from published university extension sources, including Penn State Extension, the University of Minnesota Extension, Virginia Tech and Hy-Line breed data. Where sources disagree — for example 3 vs 4 sq ft per bird in the coop — the page shows the range and lets you pick the standard, instead of pretending one number is settled fact. Breed data uses one shared 16-breed table across the whole site, so the coop calculator, the feed calculator and the egg calculator all agree with each other.
What PeckCalc does not do
PeckCalc gives planning estimates, not veterinary, legal or financial advice. It does not sell chickens, feed or equipment, and it does not set prices — cost calculators ask you to enter your own local prices because prices vary by place and time. Always check your local rules before keeping chickens, and consult a veterinarian for health advice.
Contact
Questions, corrections or a calculator you wish existed? Email info@peckcalc.com.