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Chicken Feed Calculator

Estimate how much layer feed your backyard flock needs each day, week, and month.

How it is calculated

Daily feed is daily = hens × per_hen, with the amount per hen in grams. If you leave the per-hen box empty, or enter zero or a negative number, the tool uses 120 g. Weekly feed is daily × 7 / 1000 and monthly feed is daily × 30 / 1000, both in kilograms. A month is counted as 30 days, not as a calendar month.

The number of hens must be greater than zero. Daily grams are shown as a whole number and the weekly and monthly totals to two decimals. The figure is a flat average for the whole flock: it does not change with the season, the breed, whether the birds also forage, or the age of the hens, so adjust the per-hen number to match your birds and use the result as a purchasing estimate.

Worked example

Eight hens, each eating 110 g a day. Daily feed: 8 × 110 = 880 g. Weekly: 880 × 7 = 6,160 g, which is 6.16 kg. Monthly over 30 days: 880 × 30 = 26,400 g, which is 26.40 kg. With the per-hen box left empty the same flock would be set at 120 g each, giving 960 g a day.

Try this example →

Common mistakes

  • Entering the amount per hen in kilograms or ounces. The box is grams, so 0.12 would be read as 0.12 g and give a tiny total.
  • Counting roosters, chicks or other birds as hens without considering that they may eat a different amount. Adjust the per-hen figure or the count to match.
  • Treating the monthly figure as a calendar month. It is always 30 days, so a 31-day month needs slightly more.
  • Forgetting spillage and waste. Feeders lose some feed, so buy a little more than the total shown.
  • Leaving the per-hen box at a default for birds on free range. Hens that forage eat less bagged feed, so the default can overstate what you need.

Sources

About this calculator

This calculator scales the standard rule of thumb that an adult laying hen eats roughly 120 g (about a quarter pound) of layer feed per day up to daily, weekly and monthly totals for a whole flock. The per-hen amount is an input you can change; larger dual-purpose breeds typically eat more than smaller layer breeds, but the tool does not adjust for breed, season or hen age by itself.

Backyard chicken keepers use it to budget feed purchases and avoid running out mid-week, while small-scale poultry farmers use the same per-bird ratio to plan bulk feed orders and estimate the feed cost per dozen eggs produced, a key number for pricing eggs or evaluating flock profitability.

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Comments (1)

  • Editorial team

    Turn the weekly total into a shopping rhythm. Eight hens at the default 120 g need 6.72 kg a week, so a 20 kg bag lasts a little under three weeks. If your birds forage, they usually eat less bagged feed, so start with the default and then adjust the per-hen amount as you watch the feeder. Does your flock free-range? Tell us what per-hen amount ended up working for you.

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