Chicken Laying Age Calculator
Enter a hatch date and breed type to see when your pullets should lay their first eggs and when the flock reaches full production.
Free · no account · works on mobile · embeddable
Best for new flock owners, pullet growers, and farms planning egg supply. Updated .
Your pullets
When to expect eggs
This window falls in the short-day months (October through January). Pullets reaching laying age as days shorten often wait for longer days unless supplemental light is provided, so plan for the late end of the range or later.
First egg = hatch date + breed window in weeks. Full production adds an 8-week ramp, because pullets come into lay gradually. Count new pullets toward egg sales from the full-production date, not the first egg.
About the chicken laying age calculator
"When will my chickens start laying?" depends on breed, hatch date, and daylight. This calculator takes a hatch date and a breed type and returns the window when the first eggs should appear, how many weeks away that is, and the date the flock should reach full production. Farms use it to know when a batch of pullets can be counted toward egg subscriptions; new keepers use it to stop checking the nest box six weeks early.
Age at first egg
Commercial layers and production hybrids are the earliest, typically 17 to 20 weeks; extension guidance moves pullets to laying housing at 16 to 18 weeks, "2 to 4 weeks before they start laying," and Minnesota Extension puts the start "about 20 weeks of age." Standard and dual-purpose breeds usually follow at 20 to 24 weeks, heavy and heritage breeds at 24 to 28 weeks or later, and bantams anywhere from 22 to 30 weeks. The calculator shows a window, not a date, because individual birds and strains vary.
The ramp to full production
Pullets do not go from zero to peak on the day of the first egg. The first weeks bring small, irregular eggs and a rising share of the flock laying; most flocks are at or near full production about eight weeks after the last birds start. The calculator adds that ramp to the late edge of the window to give a full-production date, which is the date to use when adding the flock to a subscription forecast.
Daylight can delay the first egg
Pullets that reach laying age as days shorten in fall and early winter often wait for lengthening days unless supplemental light is provided. If the calculated window lands in October through January, expect the later end of the range or beyond, or plan for lighting. Body weight matters too: underweight pullets lay late and small.
Worked example
Standard-breed chicks hatched April 1, 2026 fall in the 20 to 24 week class. Their first-egg window runs from August 19 to September 16, 2026, and with an eight-week ramp the flock should be at full production around November 11, 2026. Because that window sits in late summer, daylight should not hold them back.
Sources
- Penn State Extension, Preparing pullets: what to expect for the transition to lay. Pullets move to laying housing at 16 to 18 weeks, 2 to 4 weeks before they start laying; body weight and light stimulation shape the timing. Accessed Sep 4, 2026.
- University of Minnesota Extension, Raising layer chicks and pullets. Pullets start laying at about 20 weeks of age. Accessed Sep 4, 2026.
This calculator gives planning estimates from the numbers you enter. It is not accounting, tax, veterinary, or legal advice. Replace the defaults with your own farm records whenever you have them.
Frequently asked questions
At what age do chickens start laying eggs?
Most start between 18 and 24 weeks. Production hybrids can begin around 17 to 18 weeks, standard breeds around 20 to 24, and heavy or heritage breeds 24 weeks or later. Bantams and some ornamental breeds vary widely.
My pullets are past the window and not laying. Why?
Shortening daylight is the most common reason in fall and winter, followed by low body weight, stress from a move or predator, poor nutrition, or hidden eggs. Slow-maturing breeds also simply run late.
When can I count new pullets toward egg sales?
Use the full-production date, not the first-egg date. Early eggs are small and irregular, and only part of the flock lays at first. Add the flock to the egg subscription capacity calculator once the ramp is complete.
Does this work for ducks or other poultry?
The breed classes are for chickens. Ducks, quail, and turkeys mature on different schedules; use your breed's published range in the custom weeks fields instead.
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