Chicken Feeder Calculator
A chicken feeder calculator turns flock size and bird age into feeder space: 10 adult hens need about 40 inches of feeder space, or about 20 inches of trough fed from both sides, plus one nipple drinker for every 8 to 10 birds. Enter your flock below and pick the birds' age to see trough length, tube feeders and drinkers.
Chicken Feeder Calculator
Planning estimate. Figures vary by breed, feeder type and management — see the sources cited on this page.
Key facts
- Feeder space rises with age: about 1 linear inch per chick, rising to 4 inches per adult, according to Oregon State University Extension (PNW 477). Source: Oregon State University Extension, How to Feed Your Laying Hens (PNW 477)
- Sources disagree on adults: Penn State Extension gives 3 inches per laying bird, Oregon State gives 4 inches, and Mississippi State guidance allows up to 5 inches for laying pullets — this calculator uses 4 inches, the middle of the published 3 to 5 inch range. Source: Penn State Extension and Utah State University Extension
- A trough fed from both sides counts double: measure one side and multiply by 2 — a 4-foot trough gives 96 inches of feeder space, enough for 96 chicks at 1 inch each.
- Tube feeders: Mississippi State guidance works out at about one tube feeder per 17 hens, while other guidance allows up to one per 30 layers, so this calculator shows the range.
- Water space: Penn State Extension gives 1 inch of water space per bird, or one nipple drinker for every 8 to 10 birds. Set the feeder lip level with the birds' back height and fill a trough only one-third to one-half full to limit waste.
How the chicken feeder calculator works
Enter the number of birds and pick their age, and the calculator multiplies birds by feeder space per bird — 1 inch for chicks, 3 inches for growers and 4 inches for adults — to give total linear feeder space. Because a trough is fed from both sides, it halves that total to give the trough length you need, and it converts the same flock into tube feeders and nipple drinkers.
Tube feeders are shown as a range because the guidance differs: Mississippi State guidance works out at about one tube feeder per 17 hens, while other guidance allows up to one per 30 layers. If dominant birds crowd weaker ones away from the feed, add a feeder rather than a bigger one — two feeding points beat one crowded one.
How much feeder space does each chicken need?
Chicks need about 1 inch of feeder space each, growers about 3 inches and adults about 4 inches. For adults the published range is 3 to 5 inches: Penn State Extension gives 3 inches per laying bird, Oregon State gives 4 inches, and Mississippi State guidance allows up to 5 inches for laying pullets. Use 4 inches for planning and the top of the range for heavy breeds or birds that are confined all day.
For water, allow 1 inch of trough water space per bird, or one nipple drinker for every 8 to 10 birds. A flock of 10 hens needs about 10 inches of water space or 1 to 2 nipple drinkers.
What this calculator does not do
This calculator sizes feeders and drinkers; it does not work out how much feed the flock eats or how much water it drinks. Use the feed calculator for daily feed and bag planning, and the water calculator for daily water volume and waterer capacity. It also does not choose a feeder brand or style — hanging tube feeders, troughs and treadle feeders all work if the space per bird is right.
Chicks need flat, open feeders for the first days — a deep tube feeder is no use to a day-old chick — so plan on changing feeder types as the birds grow.
Frequently asked questions
How much feeder space does a chicken need?
About 4 inches of linear feeder space per adult bird, 3 inches per grower and 1 inch per chick. Penn State Extension gives 3 inches per laying bird and Mississippi State guidance allows up to 5, so 4 inches is the middle of the published range.
How many feeders do I need for 10 chickens?
10 adult hens need about 40 inches of feeder space, which is a 20-inch trough fed from both sides or one tube feeder, plus 1 to 2 nipple drinkers. Add a second feeder if dominant birds crowd weaker ones away from the feed.
How many chickens can one tube feeder serve?
Roughly 17 to 30 layers per tube feeder. Mississippi State guidance works out at about one tube feeder per 17 hens, while other guidance allows up to one per 30, so this calculator shows the range.
How many drinkers do chickens need?
Allow 1 inch of trough water space per bird, or one nipple drinker for every 8 to 10 birds. A flock of 10 hens needs about 10 inches of water space or 1 to 2 nipple drinkers.
How high should a chicken feeder be?
Set the feeder lip level with the birds' back height and fill a trough feeder only one-third to one-half full. That keeps feed in the trough and cuts waste from scratching and billing out.
The Chicken Feed Calculator covers how much feed the flock eats in more detail. The Chicken Water Calculator covers this topic in more detail. The Chicken Waterer Types guide covers this topic in more detail. Two related calculators worth checking next are the Chick Brooder Size Calculator and Chicken Coop Size Calculator.