Feed Cost Per Dozen Eggs
“Are our chickens actually saving us money?” It’s one of the most common questions in backyard chicken keeping, and the answer is simple math. The formula is right below. All you need is your feed receipt, your egg count and a calculator. AI is optional. It’s handy for the “what if” questions once you have your number.
The job
Figure out what your eggs really cost you in feed, so you can decide on flock size and egg prices and know whether it’s worth it.
The formula (do this first)
Grab these from your receipt and your egg record sheet: the bag price, how many days a bag lasts (N), and how many eggs you collect in a week (E).
- Feed cost per day = bag price ÷ N
- Eggs per day = E ÷ 7
- Feed cost per egg = feed cost per day ÷ eggs per day
- Feed cost per dozen = feed cost per egg × 12
Do that on paper once. Add bedding and oyster shell only after the feed math is solid. Stacking soft estimates on soft estimates is how people talk themselves into a number that feels precise and isn’t.
We’re not giving you an “average cost per dozen” here, because any number we printed would be wrong for your feed store and your hens. Your numbers are the only ones that count.
The pillar
Organization and Knowledge.
Let AI help (optional)
Once you have your own number, AI is useful for setting up the same steps for other situations and for building a tracker. It’s not the calculator. Here’s what to watch for.
Where AI falls short
- It doesn’t know your prices. Feed costs change and vary by region. If you don’t give it your receipt, it’ll guess.
- It can make math errors. Language models write numbers. They don’t always calculate them correctly. Always ask it to show its work, and check the work.
- It doesn’t know your flock’s real laying. Hens lay less in winter, during molt and as they age. Your egg log beats any estimate.
Step 1: Collect your real numbers
- Feed bag size and price, from your receipt
- How many days a bag lasts
- Eggs collected per week, from your egg record sheet
- Optional: grit, oyster shell, bedding and treats per month
Step 2: Ask for the math, step by step
A [weight] bag of layer feed costs [price]. It lasts my [number] hens about [days] days. I collect about [number] eggs a week. Show your math step by step:
- Feed cost per day
- Eggs per day
- Feed cost per egg
- Feed cost per dozen
Then do it again including [bedding/oyster shell costs] per month.
Step 3: Check it
Redo the four steps on a calculator. It takes a minute. If AI’s answer doesn’t match, trust the calculator and tell AI where it went wrong. It’s a good habit for everything on this site.
Step 4: Ask the “what if” questions
This is where AI earns its keep, with ideas and comparisons:
- “What if laying drops by a third in winter?”
- “What if I buy feed in bulk at [price]?”
- “What if I add four more hens?”
- “If I sell [number] dozen a week at [price], do I cover feed?”
Let AI lay out the scenarios; run the final numbers on your calculator.
Step 5: Build a simple tracker
Make a printable monthly table with columns for date, feed bags opened, cost, eggs collected and cost per dozen, plus a yearly summary row.
If you’re selling eggs
Pricing is only half of it. Rules for selling eggs, like licensing, labeling, cartons and refrigeration, vary by state. Some states also require flock registration. Check with your state department of agriculture before you put out a sign. AI can make you a list of questions to ask, but don’t take its word on the rules themselves.
Check it here
- A calculator, for every number
- Your feed store receipts
- Your state department of agriculture for egg sales rules
- Your extension office for flock nutrition
What the number is for
Cost per dozen is not a verdict on whether you “should” keep chickens. Fresh eggs, pest control, manure for the compost and teaching kids responsibility don’t show up on a feed receipt. The number just stops the guessing. Sell eggs only after you know the rules in your state, and price them with your eyes open.
Print it
Print the monthly tracker and keep it with your egg records. After a year you’ll know what your eggs cost in every season. That’s the kind of number that makes decisions easy.
[DOWNLOAD PLACEHOLDER: feed cost per dozen tracker]
You can’t be self-sufficient on guesswork. Start with the formula; let AI handle the what-ifs.