Chicken Egg Production Calculator
| Flock (dual-purpose) | Peak week | Winter week | Dozens a month, peak |
|---|---|---|---|
| 4 hens | ~17 eggs | ~8 eggs | ~6.1 dozen |
| 6 hens | ~25 eggs | ~13 eggs | ~9.0 dozen |
| 10 hens | ~42 eggs | ~21 eggs | ~15.2 dozen |
A hen does not lay an egg a day - she runs a 25-hour cycle, which is why the math starts with the breed rate, not the day count. Production hybrids like ISA Browns and leghorns are the machines of the trade at 250 to 300 eggs a year; dual-purpose breeds like Rhode Island Reds and Plymouth Rocks cruise at 200 to 250; the ornamental heritage breeds trade eggs for looks at 150 or fewer. Six typical dual-purpose hens at spring peak is about 25 eggs a week - two dozen plus a spare, more omelets than most families know what to do with.
Bottom line: flock size times the breed's annual rate divided by 52 is the honest weekly number - and then daylight edits it. Hens need about 14 hours of light to lay at full rate, so without supplemental light the winter figure is roughly half the summer peak, and the calculator's season factor is where that reality lands.
The honest part: the annual rate is a first-two-years number, not a lifetime promise - lay rate drops roughly 10 to 15 percent a year after year two, the fall molt pauses production entirely for 8 to 12 weeks while the hen replaces her feathers, and stress from heat, predators or a coop move blanks weeks off the tally. Plan the egg budget on the calculator, then shave a sixth for the molt and the bad weeks nobody photographs for the internet.
How to use
- Count your laying hens - pullets not yet at their 18-to-22-week point and retired veterans do not count toward the rate.
- Pick the breed tier that matches your flock - production hybrid, dual-purpose, or heritage - and the season you are planning for, including whether you run coop lights in winter.
- Read the weekly number as a planning figure: dozens per month for the household budget, surplus for the neighbors, and the feed-cost cross-check against the per-dozen grocery price.
Frequently asked questions
How many eggs does a chicken lay per day?
At best, one every 25 hours - the biology cannot quite fit a 24-hour day, so even the best layers take a day off most weeks. A production hybrid peaks at an egg a day for her first two seasons; a dual-purpose hen delivers four to five a week; heritage breeds average three. The per-day question really resolves to the flock math: six dual-purpose hens is two dozen eggs a week at peak.
How many eggs do 6 chickens lay per week?
Twenty to 26 in spring and early summer depending on breed - hybrids push 30, dual-purposes sit near 25, heritage strains closer to 15. Winter without supplemental light drops the same flock to 10 to 13. That is the range the calculator prices, and it is why flock size advice always says: start with the household's worst-week needs, not the best-week harvest.
Why did my hens stop laying in winter?
Daylight - the hen's reproductive cycle is triggered by about 14 hours of light, and when days shorten she either slows to a trickle or stops entirely, often combining the slowdown with the fall molt. A low-watt coop light on a timer to extend perceived daylight to 14 hours restores most of the rate. The no-light alternative is honest too: let the hens rest the winter, because the laying years are a finite budget either way.
When do hens start and stop laying?
Pullets start between 18 and 22 weeks - small first eggs, then full size within a month. Production peaks in years one and two, then drops 10 to 15 percent a year. Hybrids lay hard for three to four seasons; dual-purpose hens lay reliably longer but slower. Backyard hens often live 8 to 10 years, so the retirement years are real - plan for the flock as pets that pay partial rent, not appliances.
What is the molt and when does it happen?
The annual feather replacement - usually the first cold weeks of fall - and it pauses egg production entirely for 8 to 12 weeks, because the protein budget goes to feathers. You will see it: dropping feathers everywhere, pin feathers coming in, hens looking threadbare and acting grumpy. Feed a higher-protein ration during the molt, expect the blank weeks in your egg math, and do not panic that the flock is sick.
Is it cheaper to keep hens than to buy eggs?
Usually not on paper - feed, bedding and the coop put backyard eggs at a premium to the grocery dozen, and the feed calculator prices the honest per-dozen cost. The math flips with heavy layers, kitchen-scrap feeding, and a household that actually eats the surplus - and the intangibles, better yolks, the compost, the pest control, are why almost everyone who keeps six keeps them for years.