What Is the Chicken Feed Calculator?
The Chicken Feed Calculator helps backyard keepers and small farmers estimate how much feed their flock will consume each day, week and month. Knowing your feed requirement makes it easy to budget, buy the right size bags, and avoid running out or over-stocking feed that can spoil. The default of 120 grams per bird per day reflects the typical appetite of a standard laying hen, though you can adjust it for your own breed and conditions.
How to Use It
Enter the number of hens in your flock and the average feed each hen eats per day in grams. Lighter breeds and bantams may eat less (90–110 g), while heavy breeds or birds in cold weather may eat more (130–150 g). The calculator instantly returns the total feed needed per day in grams and kilograms, plus weekly and monthly totals so you can plan purchases.
The Formula Explained
The core calculation is simple multiplication:
$$\text{Daily feed (g)} = \text{Number of hens} \times \text{Feed per hen (g/day)}$$To get larger time spans, the daily figure is multiplied by 7 for a week and 30 for a month, then divided by 1,000 to convert grams to kilograms.
Worked Example
Suppose you keep 10 laying hens that each eat 120 g per day.
$$\text{Daily feed} = 10 \times 120 = 1{,}200 \text{ g} = 1.2 \text{ kg}$$Over a week that is
$$1.2 \times 7 = 8.4 \text{ kg}$$and over a 30-day month it is
$$1.2 \times 30 = 36 \text{ kg}$$So a 20 kg bag of layer feed would last roughly 16–17 days for this flock.
FAQ
How much should a chicken eat per day? A typical adult laying hen eats around 120 grams (about 1/4 lb) of complete feed daily, plus any treats and forage.
Does the season change feed needs? Yes. Hens eat more in cold weather to stay warm and slightly less in hot weather, so adjust the grams-per-hen value accordingly.
Does this include treats and scraps? No. The figure is for complete formulated feed. Treats should stay under about 10% of the diet to keep nutrition balanced.
