Free egg production calculator. Enter hens and eggs per hen per week to estimate weekly and yearly egg production for your flock.
Your results will appear here.
Enter your values and press Calculate.
Multiply hens by eggs per hen per week for the weekly total, then multiply by 52 for the year. Twelve hens laying 5 eggs each per week give 60 eggs a week and 3120 a year. These are estimates for planning, since breed, age, daylight, and health move real production up and down.
Eggs per week equal hens multiplied by eggs per hen per week, and eggs per year equal weekly eggs multiplied by 52. This chicken egg production formula is simple on purpose: the hard part is choosing a realistic eggs per hen figure, not the arithmetic. A healthy young layer in a good breed gives 5 to 6 eggs per week, while older hens, mixed flocks, and ornamental breeds give fewer.
Twelve hens at 5 eggs each per week give 60 eggs per week and 3120 per year. Twenty hens at 6 eggs each per week give 120 eggs per week and 6240 per year. At an 85 percent laying rate, 100 hens give about 85 eggs per day, 50 hens give about 40 to 45 per day, and 4 hens give about 3 to 4 per day. A rough planning rule used by competitor guides is hens multiplied by two thirds equals eggs per day.
Enter your hen count and a realistic eggs per hen per week figure for your flock. Use 5 to 6 for young high production breeds, 4 to 5 for good dual purpose breeds, and 3 to 5 for mixed backyard flocks. If you are planning a new flock, work backwards: divide the eggs per day you want by two thirds to estimate hens needed, then add a few extra hens for moulting, illness, and skipped days.
White Leghorns lay about 280 to 320 eggs per year, Golden Comets up to 300, Rhode Island Reds about 250 to 300, Australorps about 250 to 300, Plymouth Rocks about 200 to 280, and ISA Browns over 300 in peak years. Ornamental breeds like Silkies lay only about 100 to 150 per year. Breed sets the ceiling, but feed, light, and health decide how close your flock gets to it.
Hen day egg production is eggs laid on a day divided by hens present that day, times 100. Hen housed production divides by hens housed at the start of laying instead, so it falls when birds are lost. A farm average of 85 percent or more per year is considered strong. For backyard planning, the weekly eggs per hen figure on this page is easier to use than either index, and it converts to the same totals.
Hens need about 14 to 16 hours of light a day to lay consistently, so winter egg laying drops as days shorten. Once a year, usually in autumn, hens molt: they shed feathers, regrow them, and production drops sharply or stops for weeks. That molting egg production drop is normal and healthy, not a sign of disease, so plan your yearly estimate with a quiet period built in rather than expecting peak laying all year.
Breed, age, diet, daylight, weather, stress, and health all move production. Hens peak in their first 1 to 2 years, then decline by roughly 20 percent a year after age two. A hen takes 24 to 26 hours to form one egg, so even the best layer cannot lay two eggs a day. Protein, calcium, clean water, and a calm coop matter more than any supplement, and heat stress in summer cuts laying just as surely as short winter days.
Competitor pages give a formula with one example, or a breed list with no calculator at all. Our page combines the formula, worked examples for small and large flocks, breed yields, the hen day definition, and seasonal effects on one mobile first screen, with no ads and no sign up. The result is a planning number you can defend, not just a guess.
Multiply hens by eggs per hen per week. Twelve hens at 5 eggs each give 60 eggs per week, and twenty hens at 6 eggs each give 120 eggs per week.
About 9 to 10 hens, using the rule that about two thirds of hens lay on any given day. Add a few extra hens to cover moulting, skipped days, and illness.
At an 80 to 85 percent laying rate, about 80 to 85 eggs per day for a healthy flock of high production breeds. Mixed or older flocks lay fewer.
At most one egg per day, because forming an egg takes 24 to 26 hours. A hen that lays today may skip tomorrow as the cycle drifts later, which is normal.
Healthy young layers run at 80 to 90 percent, meaning 80 to 90 eggs per 100 hens per day. Older hens or mixed flocks often run at 60 to 70 percent.
Short daylight hours are the usual cause. Hens need about 14 to 16 hours of light to lay consistently, so production falls in winter unless you add supplemental light. Cold, moulting, and stress add to the drop.
Not at peak rate. Production drops in winter, pauses during the annual molt, and declines with age. Expect strong laying in spring and summer, a quiet period in autumn, and a slower winter.
White Leghorns and ISA Browns lead the field at about 280 to over 300 eggs per year. Golden Comets, Rhode Island Reds, and Australorps are close behind at about 250 to 300 per year.
Peak production lasts about 2 years, though hens can lay for 5 to 7 years at a declining rate. After year two, expect roughly 20 percent less each year.
No. Hens lay eggs without a rooster. A rooster is only needed if you want fertilised eggs for hatching.