Most chicken cost calculators give you a single number and no explanation of where it came from. We built ChickenCount to do the opposite: show the assumptions, show the math, and cite the sources. This page explains exactly how our calculators work and where the figures come from, so you can judge the numbers for yourself.
The core feeding assumptions
The feed cost calculator starts from these widely-cited baselines: a standard laying hen eats about a quarter-pound (0.25 lb) of feed per day, a broiler around a third of a pound (0.33 lb), and a young chick roughly a tenth of a pound (0.10 lb), scaling up as it grows. On top of that we apply a realistic feed-waste allowance of about 7%, reduce purchased feed by roughly 15% when free-ranging is selected (foraging birds eat less bought feed), and increase it by about 10% in winter, when birds burn more energy staying warm.
Egg production and space
The egg production calculator scales a per-hen weekly laying rate up to your whole flock; most common backyard layers produce 4 to 6 eggs a week under good conditions, with output dropping during molt, winter, and heat. The coop size calculator uses standard poultry-keeping guidance: 4 sq ft of coop per bird with outdoor run access (10 sq ft if confined), plus at least 10 sq ft of run per bird, adjusted for breed size.
Our sources
Wherever possible we anchor figures to university Cooperative Extension poultry publications and USDA data rather than feed-brand marketing. Extension services exist specifically to give research-based, non-commercial guidance to backyard and small-farm keepers, which makes them the right foundation for a cost tool that people actually make decisions with.
What we can and can't promise
We can promise transparency: every adjustment is shown, and you can override any default with your own local numbers. We can't promise your flock will match the averages exactly, because breed, weather, age, and management all move the real figure. Treat the results as a well-sourced starting point, then refine them against what you actually see in your own coop.
Questions about a specific number? Email us at hello@chickencount.com and we'll point you to the source.