Why "eggs per week ÷ eggs per hen" gets it wrong
The naive math — divide weekly consumption by a hen's weekly average — plans for a flock that disappoints half the year. Laying isn't flat: a hen that averages 4.8 eggs/week across the year might lay 6 in May and 2 in December. If your family eats 24 eggs every week, a flock sized to the average leaves you buying eggs all winter and drowning in surplus all spring.
This calculator lets you choose which problem you'd rather have. Size for winter coverage and you'll have spring surplus (neighbors, baking, selling a few cartons); size for the average and you'll accept store eggs in the dark months. Most families are happier sizing for winter — surplus is a nicer problem than shortage.
Quick reference: hens needed for common households
Using a good dual-purpose layer (~250 eggs/year) in its first laying year, sized to cover winter:
| Household | Eggs/week | Hens needed | Spring surplus |
|---|---|---|---|
| Single / couple, light use | 8 | 4 | ~16 eggs/wk |
| Couple, daily eggs | 14 | 6 | ~22 eggs/wk |
| Family of 4 | 24 | 10 | ~36 eggs/wk |
| Family of 6 / big bakers | 36 | 14 | ~48 eggs/wk |
Planning long-term? A flock kept 3+ years averages ~80% of first-year production, so add a hen or two — or plan to add young birds every couple of years, which most keepers end up doing anyway.
Don't forget what the flock size implies
Every hen you add ripples into space and budget. Eight hens need a 32 sq ft coop with an 80 sq ft run (check yours with the Coop Size Calculator) and eat roughly 66 lb of feed a month (see the Feed Cost Calculator for costs). The results above include both numbers so you can sanity-check the whole plan, not just the egg math. And leave room for one or two more birds than the answer — "chicken math" is undefeated.
FAQ
Should I get all one breed?
A mixed flock of good layers (say, Australorps, Easter Eggers, and a Plymouth Rock) lays nearly as well as a single-breed flock, gives you a colorful egg basket, and makes birds easy to tell apart. Use the closest breed average, or the "mixed flock" option.
How do I handle the spring surplus?
Eggs keep 2+ weeks at room temperature unwashed and 2+ months refrigerated. Beyond that: bake, freeze cracked-and-whisked eggs, share with neighbors, or sell — surplus cartons at the gate routinely fetch $4–6/dozen for true free-range eggs.
Do I need to add a rooster to this count?
No — hens lay without one. If you keep a rooster for flock protection or hatching, add him to your coop-space math but not the egg math.