Chicken Feed Calculator

How much do chickens eat by stage

Feed planning starts with a per-bird daily rate, then scales by flock size. This calculator uses extension-style planning rates: chicks at about 0.1 lb/day, growers at 0.2 lb/day, laying hens at 0.25 lb/day, and broilers at about 0.33 lb/day while they are on a meat-bird program. Those numbers are averages for healthy birds with continuous access to feed. Hot weather, heavy breeds, and free-ranging can nudge intake up or down, but the rates are solid for bag and budget planning.

A worked example many keepers use: six layers eat 6 × 0.25 = 1.5 lb of layer feed per day. Over a 30-day month that is 45 lb. Over a 365-day year it is 547.5 lb. Divided by a standard 50-lb bag, that is 10.95 bags per year. If bags cost $22 each, annual feed cost is about $240.90 using the exact bag fraction (not rounded up).

Reading a feed tag

Match the bag to the stage. Starter (often 20–22% protein) supports chicks through the first weeks. Grower (roughly 16–18%) covers the awkward middle before lay. Layer feed (commonly 16–18% protein with added calcium) supports shell quality once hens start producing. Broiler rations are denser because meat birds grow fast and are usually processed around eight weeks. Do not feed layer ration to chicks — the calcium level is too high for growing bones.

Keep oyster shell free-choice for layers even when the bag already includes calcium. Hens that are not laying will ignore shell; heavy layers take what they need. Offer insoluble grit if birds do not have access to small stones outdoors so they can grind whole grains and scratch.

Feed costs and buying in bulk

Bag price swings with brand, protein level, and whether you buy at a mill, co-op, or big-box store. Enter your real price above to turn weight into a yearly dollar figure. Exact bags (10.95 in the six-hen example) are useful for budgets; “bags to buy” rounds up because you cannot purchase a tenth of a bag at checkout. If you can store feed dry and rodent-proof, larger bags or shared mill orders usually cut cost per pound. Rotate stock so older bags are used first — rancid fat and mold waste money and can make birds sick.

Kitchen scraps and garden greens are fine as treats, but keep them under about 10% of the diet so birds still get a balanced ration. If your flock free-ranges hard in spring, you may see slightly lower bag use for a few weeks; do not assume pasture replaces a complete feed year-round.

Common mistakes

• Feeding layer feed to chicks. Excess calcium can damage developing kidneys. Keep stages on the correct bag until the label says otherwise.
• Ignoring feeder waste. Overflow, rain-soaked mash, and rodents can quietly add 10–15% to what you think you are feeding. Hang or shield feeders and clean wet feed promptly.
• Overdoing treats. Too many scraps dilute protein and minerals. Soft shells, poor feathering, and slower growth often trace back to an unbalanced “table scrap” diet.

Frequently asked questions