Egg Production Calculator

Hen-day divides eggs collected by your current flock size, while hen-housed divides the same egg count by the original number of hens placed at the start of lay. Any mortality or culling since placement shrinks the current flock below the original count, which makes hen-day rise relative to hen-housed — the gap between the two is effectively a running scoreboard of how much the flock has shrunk.

Hen-day production is the better real-time indicator of how well your currently living hens are laying, since it isn't diluted by historical mortality — a sudden drop in hen-day signals a current problem worth investigating (nutrition, lighting, disease, heat stress), while hen-housed is more useful as a cumulative, flock-lifetime performance metric for comparing this flock's overall output against past flocks or industry benchmarks.

No — the annual, monthly, and weekly figures are all straight-line extrapolations of today's daily collection rate multiplied out across calendar days. Real laying flocks typically show seasonal and age-related variation in lay rate, so if you expect production to rise or fall meaningfully over the coming months, treat these projections as a snapshot estimate rather than a true annual forecast.

It's the share of your originally housed hens that are no longer in the current flock, whether from death, culling, or removal, calculated as the difference between hens housed and current flock size relative to hens housed. A rising mortality percentage over a flock's life directly explains why hen-housed production keeps falling further below hen-day production as the flock ages.