How the feed estimate works
Feed is the biggest recurring cost of keeping chickens, and it's surprisingly easy to estimate once you know the standard per-bird intake rates published by cooperative extension services. This calculator multiplies your flock size by an extension consumption rate for the bird type you select, then converts to weekly, monthly, and annual totals, bag life, and cost.
The core figure comes fromAlabama Cooperative Extension's "Feeding the Laying Hen": an adult layer eats about 100–150 g (≈ 0.25 lb, or 4 oz) of complete feed per day. Broiler and chick rates are derived from the cumulative feeding tables inUniversity of Maryland Extension's "Feeding the Flock"(Vest & Dale 2002).
Consumption rates used by this calculator
| Bird type | Rate used | Basis |
|---|---|---|
| Laying hen (adult) | 0.25 lb/day (100–150 g/day) | Alabama Extension, "Feeding the Laying Hen" |
| Broiler (0–7 weeks avg.) | ≈ 0.18 lb/day average (9 lb cumulative ÷ 49 days) | UMD Extension: 2 lb in weeks 0–3 + 7 lb in weeks 4–7 |
| Chick / pullet (0–6 weeks) | ≈ 0.10 lb/day average (4 lb cumulative ÷ 42 days) | UMD Extension: brown egg layer, 4 lb starter over 0–6 weeks |
| Water | ≈ 2 × feed weight | Alabama Extension |
The broiler and chick daily rates are averages across a growth period, derived from the cumulative UMD totals — young birds eat far less at the start and much more at the end of each window, so use them for budgeting, not day-by-day rationing. The annual layer figure of ≈ 91 lb/bird is likewise a derived value (0.25 lb × 365), not a separately published statistic.
Reference points to sanity-check your numbers
Alabama Extension's own worked example matches this calculator's default exactly: a flock of 10 laying hens eats about 2.5 lb of feed per day, so a 50 lb bag lasts roughly 20 days. UMD's cumulative tables offer longer-horizon checkpoints — a brown egg layer eats about 4 lb of starter (0–6 weeks), 46 lb of grower (7–18 weeks), and 104 lb of layer ration from weeks 19–70; white egg strains run lighter at 3 / 12 / 80 lb for the same stages.
Water: the forgotten ration
Chickens can skip a meal, but water deprivation cuts egg production within hours. The extension rule of thumb — water intake ≈ twice the weight of feed eaten — means a 10-hen flock consuming 2.5 lb of feed needs about 5 lb (0.6 gal) of clean water daily, and substantially more in summer heat. The calculator reports this alongside feed so you can size waterers appropriately.
Stretching your feed budget
Three habits move the needle most. First, control waste: hanging feeders set at back height, or feeders with anti-scratch lips, can save 10–20% versus open troughs. Second, store feed in sealed metal bins — rodents both eat feed and spoil it. Third, buy the right ration for the bird's stage: feeding expensive layer ration to broilers (or calcium-heavy layer feed to chicks, which can harm them) wastes money and can hurt the birds. If your real-world bag life differs from the estimate, adjust for foraging, season, and waste — then use your own measured rate for future budgeting.
Frequently Asked Questions
How much feed does a laying hen eat per day?
Alabama Cooperative Extension's "Feeding the Laying Hen" puts adult layer intake at about 100–150 grams per day, roughly 0.25 lb (4 oz). That's the default this calculator uses. Actual intake varies with breed, temperature (hens eat more in cold weather), egg production rate, and how much they forage.
How long will a 50 lb bag of feed last?
Divide the bag weight by your flock's daily consumption. At the extension standard of 0.25 lb per laying hen per day, 10 hens eat 2.5 lb daily, so a 50 lb bag lasts about 20 days. Six hens would stretch the same bag to roughly 33 days.
How much feed does a chicken eat per year?
At 0.25 lb/day, one laying hen eats about 0.25 × 365 ≈ 91 lb per year. Note this is a derived figure from the Alabama Extension daily rate, not a separately published annual number — real-world totals move with season, molt, and foraging.
Do broilers and chicks eat different amounts?
Yes, and their intake changes fast as they grow. University of Maryland Extension's feeding tables (Vest & Dale 2002) give cumulative figures: broilers eat about 2 lb of feed in weeks 0–3 and 7 lb more in weeks 4–7; brown egg pullets eat about 4 lb of starter (0–6 weeks) and 46 lb of grower (7–18 weeks). This calculator converts those cumulative totals into approximate daily averages for budgeting.
How much water do chickens need?
Alabama Extension's rule of thumb is that chickens drink about twice the weight of the feed they eat. A flock eating 2.5 lb of feed per day needs roughly 5 lb of water — about 0.6 gallons — and considerably more in hot weather. Clean water should always be available.
Why is my real feed bill different from the estimate?
Waste is the biggest wildcard: poorly designed feeders can spill 10–20% of feed, and rodents and wild birds help themselves too. Foraging flocks eat less commercial feed in summer; cold weather increases intake. Treat these numbers as a planning baseline and track a bag or two to calibrate for your own flock.