{
    "name": "Poultry Mortality Calculator",
    "url": "https://calculators.geekmidst.com/calculators/poultry-mortality-calculator",
    "markdown": "https://calculators.geekmidst.com/calculators/poultry-mortality-calculator.md",
    "category": "Agriculture",
    "description": "Work out cumulative flock mortality, livability, birds remaining and the average daily and weekly mortality rate from birds placed, deaths and culls.",
    "summary": "Cumulative mortality is the birds lost (dead plus culled) as a share of the birds placed. Spread over the days since placement, it gives a daily rate you can compare between flocks.",
    "also_called": [
        "Flock mortality calculator",
        "Livability calculator"
    ],
    "applies_to": "Worldwide",
    "last_updated": "2026-10-29",
    "computation": "Results are computed in the visitor’s browser on the HTML page. This API describes the calculator; it does not compute results.",
    "inputs": [
        {
            "name": "placed",
            "label": "Birds placed",
            "type": "number",
            "default": "5000"
        },
        {
            "name": "dead",
            "label": "Birds found dead",
            "type": "number",
            "default": "150"
        },
        {
            "name": "culled",
            "label": "Birds culled",
            "type": "number",
            "default": "50",
            "optional": true
        },
        {
            "name": "days",
            "label": "Days since placement",
            "type": "number",
            "default": "42"
        }
    ],
    "outputs": [
        {
            "key": "mortality",
            "label": "Cumulative mortality",
            "format": "percent"
        },
        {
            "key": "livability",
            "label": "Livability",
            "format": "percent"
        },
        {
            "key": "remaining",
            "label": "Birds remaining",
            "format": "integer"
        },
        {
            "key": "dead_pct",
            "label": "Deaths",
            "format": "percent"
        },
        {
            "key": "cull_pct",
            "label": "Culls",
            "format": "percent"
        },
        {
            "key": "daily_mortality",
            "label": "Average mortality per day",
            "format": "percent"
        },
        {
            "key": "weekly_mortality",
            "label": "Average mortality per week",
            "format": "percent"
        }
    ],
    "formula": {
        "text": "Mortality % = (Dead + Culled) ÷ Placed × 100;  Livability % = 100 − Mortality %;  Daily % = Mortality % ÷ Days",
        "variables": {
            "Placed": "birds at the start of the flock",
            "Dead, Culled": "cumulative losses to date",
            "Days": "days since placement"
        }
    },
    "worked_example": {
        "inputs": {
            "placed": "5000",
            "dead": "150",
            "culled": "50",
            "days": "42"
        },
        "steps": [
            "Losses = 150 + 50 = 200 birds.",
            "Mortality = 200 ÷ 5,000 = 4%; livability = 96%; 4,800 birds remain.",
            "Average per day = 4% ÷ 42 = 0.095%."
        ],
        "result": "Losing 200 of 5,000 birds in 42 days is 4% cumulative mortality, about 0.095% a day."
    },
    "interpretation": "Mortality is rarely even: the first week and heat or disease events dominate. Record losses daily and look at weekly figures to spot problems early; a sudden rise warrants a vet’s attention.",
    "assumptions": [
        "Culls count as losses alongside deaths."
    ],
    "limitations": [
        "The daily figure is an average and hides peaks.",
        "Birds moved out or sold early are not counted as losses; subtract them from birds placed if needed."
    ],
    "rules": null,
    "faqs": [
        {
            "question": "Should culls count as mortality?",
            "answer": "Most flock records report total losses (dead plus culled) and also show each separately, as this calculator does."
        },
        {
            "question": "What is a normal mortality rate?",
            "answer": "It depends on the bird type, age, housing and region. Compare with your own records and with your breed company’s or integrator’s targets."
        }
    ],
    "sources": [],
    "related": [
        {
            "name": "Poultry Feed Conversion Calculator",
            "url": "https://calculators.geekmidst.com/calculators/poultry-feed-conversion-calculator"
        },
        {
            "name": "Percentage Calculator",
            "url": "https://calculators.geekmidst.com/calculators/percentage-calculator"
        },
        {
            "name": "Percentage Change Calculator",
            "url": "https://calculators.geekmidst.com/calculators/percentage-change-calculator"
        }
    ],
    "disclaimer": null,
    "publisher": "GM¹X CalcVerse"
}