How much feed do 40 chickens eat per day?

40 laying hens eat approximately 10 lb of feed per day based on the standard rate of 0.25 lb per bird per day.

How big should a coop be for 40 chickens?

A coop for 40 standard-size chickens needs at least 160 square feet of indoor space (4 sq ft per bird) and 400 square feet of outdoor run (10 sq ft per bird).

How many bags of feed do 40 chickens need per year?

40 layers consume about 3,650.0 lb of feed per year, which is roughly 73.00 standard 50-lb bags.

What infrastructure do I need for 40 chickens?

Plan for a 160 sq ft coop, 400 sq ft run, 10 nesting boxes, 4 waterers, and 5 feeders. Bulk feed storage and good ventilation become critical at this scale.

How Much Feed for 40 Chickens? (Per Day, Month & Year)

Feed & space numbers for 40 chickens

Daily feed

10 lb

Monthly feed (30 d)

300 lb

Annual feed

3,650.0 lb

50-lb bags / year

73.00

Coop space

160 sq ft

Run space

400 sq ft

Nesting boxes

Roost length

400 in

Running 40 chickens moves beyond casual backyard keeping into small-farm territory. At this scale, bulk feed purchases become essential, and your coop and run need careful planning to keep birds healthy, ventilated, and productive.

Keeping 40 chickens: what to expect

A flock of 40 birds produces serious volume. Expect to go through feed quickly — plan a secure, rodent-proof storage area for multiple bags. Automated waterers and larger feeders reduce daily labor and keep birds consistently supplied.

Forty birds demand infrastructure: dual water lines, redundant feeders, and a cull/processing plan. Hobby framing no longer fits the workload.

Hire help or automate. Forty birds without a clear morning/evening checklist lead to skipped nest checks and broken eggs under roosts.

Forty layers approach wholesale volume. Cooler capacity and delivery logistics dominate once production stabilizes.

Budget for mortality replacement — forty birds means you will see more routine losses. Build a quarantine pen downwind of the main flock before disease forces the issue.

Frequently asked questions

How much feed do 40 chickens eat per day?: 40 laying hens eat approximately 10 lb of feed per day based on the standard rate of 0.25 lb per bird per day.
How big should a coop be for 40 chickens?: A coop for 40 standard-size chickens needs at least 160 square feet of indoor space (4 sq ft per bird) and 400 square feet of outdoor run (10 sq ft per bird).
How many bags of feed do 40 chickens need per year?: 40 layers consume about 3,650.0 lb of feed per year, which is roughly 73.00 standard 50-lb bags.
What infrastructure do I need for 40 chickens?: Plan for a 160 sq ft coop, 400 sq ft run, 10 nesting boxes, 4 waterers, and 5 feeders. Bulk feed storage and good ventilation become critical at this scale.

At the standard layer rate of 0.25 lb per bird per day, your 40 hens will go through 10 lb of feed daily, adding up to 300 lb each month and 3,650.0 lb over a full year. That works out to roughly 73.00 bags of 50-lb layer feed annually.

Your coop should provide at least 160 square feet of indoor floor space and 400 square feet of outdoor run. Plan for 10 nesting boxes (one per four hens, minimum two), 400 inches of roost bar, 4 waterers, and 5 feeders.

Calculate your own feed estimate

Adjust the flock size or life stage below to recalculate feed needs instantly.

Chicken feed calculator

Pre-filled for 40 birds — layers eat ~0.25 lb/bird/day.

Enter flock size to estimate feed.

Coop & run sizing for 40 chickens

Switch between standard, bantam, and meat-bird spacing to see how requirements change.

Chicken coop size calculator

Pre-filled for 40 standard birds (4 sq ft coop / 10 sq ft run each).

Enter bird count to size the coop.

Estimates only — consult your local extension office for advice specific to your land and animals.