Poultry Mortality & What the Losses Cost
Counts broilers
Every bird that dies wastes the chick, feed and care already spent and loses the sale it would have made. Turn a mortality % into dead birds, cost lost and revenue lost — and see why biosecurity and brooding pay.
Cost out flock mortality
Next: treat mortality as a profit leak — every point above target costs you here ₹1,08,000 in sales; tighten brooding, biosecurity and vaccination first.
Lost revenue values dead birds at full sale price (the ceiling), while lost cost is the chick + feed already sunk into them; the true loss sits between, plus knock-on overheads.
Mortality impact — key facts
- Dead birds
- flock × mortality % ÷ 100
- Survivors
- flock − dead birds
- Cost lost
- dead × cost per bird
- Revenue lost
- dead × sale price
- Normal broiler
- ≈ 3–5% per cycle
- Worst week
- often week 1 (brooding)
- Biggest driver
- disease / poor biosecurity
- Privacy
- Runs in your browser; nothing uploaded
A dead bird costs twice — what you spent and what you'd earn
Mortality is easy to shrug off as a percentage, but each bird that dies has already eaten feed, taken heat, labour and medication, and it can no longer be sold. So every loss is two hits: the sunk cost you can't get back and the revenue you'll never earn. The later in the cycle a bird dies, the more it has eaten before dying — which is why a few percent can quietly swallow a flock's profit.
This tool turns your mortality percentage into dead birds, survivors, cost lost and revenue lost from flock size, per-bird cost and sale price. Use it to see what your current losses really cost, to compare against a lower target rate, and to justify spending on vaccination, ventilation, clean water and biosecurity. Pair it with the Broiler Profit, Broiler Growth Standard and Poultry Brooding tools for a full flock plan.
See the real cost
Turn a mortality % into money lost.
Justify biosecurity
Compare losses against the fix's price.
Target the first week
Better brooding cuts early deaths.
Protect the margin
A small drop in mortality lifts profit.
Frequently Asked Questions
What is poultry mortality impact?+
It is the real loss behind a mortality figure. Every bird that dies wastes the chick, feed and care already spent on it and loses the sale it would have made. This calculator turns a mortality percentage into dead birds, survivors, the cost wasted and the revenue lost, so the true bite of losses is visible.
How is the mortality impact calculated?+
Dead birds = flock size × mortality % ÷ 100. Survivors = flock size − dead birds. Cost lost = dead birds × the cost already spent per bird. Revenue lost = dead birds × the sale price each would have fetched. For example 5,000 birds at 6% mortality is 300 dead, 4,700 survivors, and the cost and sale of those 300 gone.
What is a normal broiler mortality rate?+
Well-managed broiler flocks often run around 3–5% mortality over the cycle, with most losses in the first week if brooding is poor. Layers lose birds more gradually across a long laying period. Rates well above these point to disease, poor brooding, ventilation or biosecurity problems worth fixing.
Why does mortality cost more than just the chick?+
A dead bird is not only a wasted chick — it has usually eaten feed, taken labour, heat and medication, and it can no longer be sold. So the loss is the sunk cost already invested plus the income it would have earned. The later a bird dies in the cycle, the more cost it has consumed before dying.
How does biosecurity reduce these losses?+
Disease outbreaks are the biggest driver of high mortality, and most enter through visitors, vehicles, equipment, rodents and contaminated feed or water. Strong biosecurity — footbaths, restricted entry, all-in-all-out, clean water and vaccination — cuts outbreaks, which this tool shows translating directly into birds and money saved.
Why is good brooding so important?+
The first week sets the flock up. Chicks that get the right brooding temperature, dry litter, easy access to feed and clean water grow strong and survive; those that are chilled, overheated or unable to find feed die early or stay weak. Better brooding lowers early mortality, which is where many losses occur.
Does it work for broilers, layers or any flock?+
Yes — it works for broilers, layers, breeders or backyard flocks. Just enter your flock size, the mortality percentage, the cost already spent per bird and the price each surviving bird would sell for. The dead-birds, cost-lost and revenue-lost outputs apply to any poultry enterprise.
Can I use it to justify investment?+
Yes. Compare the cost and revenue lost at your current mortality against a lower target rate, and you can see how much a vaccine programme, better ventilation, a cleaner water line or tighter biosecurity is worth. Often a small drop in mortality more than pays for the measure that achieves it.
Are the figures precise?+
They are solid planning figures. Real losses depend on when birds die, the exact feed and medication already used, and market price on sale day. Use your own per-bird cost and price, and treat the result as a clear estimate of impact to guide management — not an exact accounting entry.