Project flock egg production from hen count and lay rate — eggs, dozens, and optional sales revenue over a period.
Use this when planning egg supply for a household, CSA, or farm-stand week, or when comparing breed lay-rate expectations against a calendar period.
Peak layers may approach 80–90% hen-day production; molting, winter light, age, and nutrition pull the rate down. This is a planning estimate, not a hatchery guarantee.
Eggs = hens × (lay% ÷ 100) × days. Dozens = eggs ÷ 12. Revenue = dozens × price.
eggs = hens × (lay_rate% ÷ 100) × days
dozens = eggs ÷ 12
revenue = dozens × $/dozen
Hen-day % is eggs collected ÷ (hens × days) × 100 — the same rate you enter here when projecting forward.
24 hens at 75% for 30 days → 24 × 0.75 × 30 = 540 eggs (45 dozen). At $5/dozen ≈ $225 gross before feed and packaging.
Assumptions: constant hen count and lay rate; no breakage/cull loss unless you lower the rate.
Limits: ignores broodiness, disease, and light schedules that swing winter production.
Responsibility: follow local egg-sales rules; this is not a food-safety or business plan.
Eggs laid divided by hen-days available. 75% means 0.75 egg per hen per day on average.
Use a lower rate for young pullets coming into lay or flocks past peak.
One dozen = 12 eggs. Farm cartons are usually packed by dozen even if sizes vary.