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Chicken Feed Calculator

Estimate how much your flock eats, how long a bag lasts and what feed costs you per month and per year.

Good forage in summer can cut feed by 10–25%.

How much does a chicken eat?

A laying hen of a standard breed eats roughly a quarter pound (about 100–115 g) of complete layer feed a day, according to the University of Kentucky and Utah State extension services. Big breeds eat a little more, bantams about half as much, and every bird eats more in cold weather to stay warm.

Feed by life stage

AgeFeed typeTypical protein
0–6/8 weeksChick starter18–20%
8 weeks to first eggGrower (or starter/grower)15–18%
First egg onward (~18–22 weeks)Layer, with oyster shell on the side16%

Avoid switching to layer feed before hens start laying. Its extra calcium isn't good for growing pullets. Many keepers with mixed flocks feed an "all-flock" ration and offer oyster shell free-choice instead.

Cutting the feed bill without shortchanging hens

  • Use a feeder that stops billing out and spills. Wasted feed is often 10–30% of the bag.
  • Store feed in a metal can with a lid to keep out rodents and moisture.
  • Keep scratch grains and kitchen scraps to a small share of the diet (about 10%) so hens still get balanced nutrition.

Gear that helps

  • No-waste treadle or port feeder
  • Galvanized metal feed storage can
  • Oyster shell dispenser
  • Bulk 50 lb layer feed (local farm store often beats online)

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Frequently asked questions

How long does a 50 lb bag of feed last for 6 chickens?

About 33 days for standard hens eating 0.25 lb each per day, and a little less in winter.

Should feed be available all day?

Most keepers leave feed out free-choice during daylight. Chickens eat to meet their energy needs and don't usually overeat a balanced ration.

Sources

Last reviewed October 2026. These are planning estimates for hobby flocks. For sick birds, contact a poultry vet or your state extension office.