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Calcimator

Chicken Flock Calculator

Calculate how many hens you need for your egg target. Includes coop sizing, feed costs, and cost per dozen eggs.

Inputs

eggs/week
%
%
sq ft

Results

Hens Needed

5

Coop Size Required

20 sq ft

≈ 30 sheets of paper

Annual Feed Cost$175.00
Cost per Dozen Eggs$1.66
Meat Birds per Batch25
How to Use This Calculator
  1. Enter Eggs per Week Target for your household and the Laying Rate (%) for your chosen breed (e.g., 80% for Rhode Island Reds).
  2. Set Winter Drop (%) to account for the seasonal decline in laying during short winter days without supplemental lighting.
  3. Enter Meat Birds per Year if you plan to raise broilers alongside layers to factor feed and space for both.
  4. Review Hens Needed to achieve your egg goal and Coop Size Required (sq ft) for the resulting flock.
  5. Check Annual Feed Cost and Cost per Dozen Eggs to compare your homestead egg cost against store prices.
  6. Use Meat Birds per Batch to plan your broiler rotation schedule across the growing season.

How the result changes with Eggs per Week Target

Eggs per Week TargetHens NeededCoop Size Required
511144 sq ft
17637148 sq ft
32567268 sq ft
45093372 sq ft

What each input means

Eggs per Week Target
How many eggs your family needs per week.
Laying Rate
Average laying rate during peak season (good layers: 75-90%).
Winter Production Drop
Percentage drop in egg production during winter without supplemental light.
Meat Birds per Year
Number of broilers to raise annually for meat.
Coop Space per Bird
Interior coop space per chicken (4 sq ft minimum recommended).

What each result means

Hens Needed
Number of laying hens to meet your egg target.
Coop Size Required
Minimum interior coop space.
Annual Feed Cost
Estimated annual feed expense.
Cost per Dozen Eggs
Your egg cost per dozen (feed only).
Meat Birds per Batch
Suggested batch size for broilers.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Eggs per Week Target = 24, Laying Rate = 80, Winter Production Drop = 40, Meat Birds per Year = 25 = 5 input(s) provided
  2. Calculate Hens Needed
    Hens Needed
    5 = 5
  3. Calculate Coop Size Required
    Coop Size Required
    20 = 20
  4. Calculate Annual Feed Cost
    Annual Feed Cost
    175 = $175
  5. Calculate Cost per Dozen Eggs
    Cost per Dozen Eggs
    1.66 = $1.66

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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