{
  "slug": "livestock-water-requirement",
  "title": "Livestock Water Requirement Calculator",
  "heading": "Livestock Water Requirement Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/livestock-water-requirement",
  "summary": "Daily and peak water demand for a herd or flock by species and weather.",
  "description": "Water is the most limiting nutrient on a livestock operation, and demand isn't constant — it roughly doubles from cool weather to a 95°F heat event for cattle, which is exactly when a marginal well or trough system is most likely to fail. This calculator applies species-specific gallons-per-head-per-day baselines, adjusts for temperature and lactation status, and multiplies by head count to size a water system or check whether an existing well and storage tank can keep up during a summer heat spell, not just on a mild spring day.",
  "formula": "Daily demand = head count × base gal/head/day × temperature adjustment factor; peak storage = daily demand × hours of no-flow buffer ÷ 24.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=livestock-water-requirement",
  "inputs": [
    {
      "id": "species",
      "label": "Species",
      "kind": "select",
      "hint": null,
      "default": "beefCow",
      "options": [
        {
          "value": "beefCow",
          "label": "Beef cow (dry, ~15 gal base)"
        },
        {
          "value": "lactatingCow",
          "label": "Lactating dairy cow (~30 gal base)"
        },
        {
          "value": "feeder",
          "label": "Feeder cattle (~8 gal base)"
        },
        {
          "value": "sheep",
          "label": "Sheep/goats (~2 gal base)"
        },
        {
          "value": "hog",
          "label": "Hogs, growing (~3 gal base)"
        },
        {
          "value": "horse",
          "label": "Horse (~10 gal base)"
        }
      ]
    },
    {
      "id": "head",
      "label": "Number of head",
      "kind": "number",
      "hint": null,
      "default": 150,
      "unit": null,
      "min": 1,
      "max": null
    },
    {
      "id": "temp",
      "label": "Expected high temperature",
      "kind": "number",
      "hint": null,
      "default": 90,
      "unit": "°F",
      "min": 20,
      "max": 115
    },
    {
      "id": "bufferHours",
      "label": "Storage buffer needed",
      "kind": "number",
      "hint": null,
      "default": 24,
      "unit": "hours",
      "min": 1,
      "max": 72
    }
  ],
  "outputs": [
    {
      "id": "dailyDemand",
      "label": "Total daily water demand",
      "format": "number",
      "hint": null,
      "primary": true
    },
    {
      "id": "gpm",
      "label": "Average flow rate needed",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "storageNeeded",
      "label": "Storage capacity for buffer window",
      "format": "number",
      "hint": null,
      "primary": false
    },
    {
      "id": "tempFactor",
      "label": "Heat adjustment factor applied",
      "format": "decimal",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Species: Beef cow (dry, ~15 gal base)",
      "Number of head: 150",
      "Expected high temperature: 90 °F",
      "Storage buffer needed: 24 hours"
    ],
    "outputs": [
      "Total daily water demand: 3,600",
      "Average flow rate needed: 2.5",
      "Storage capacity for buffer window: 3,600",
      "Heat adjustment factor applied: 1.6"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter species.",
      "Enter number of head.",
      "Enter expected high temperature (°F).",
      "Enter storage buffer needed (hours).",
      "Read your total daily water demand on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "species": "beefCow",
        "head": 90,
        "temp": 54,
        "bufferHours": 14
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "species": "beefCow",
        "head": 150,
        "temp": 90,
        "bufferHours": 24
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "species": "beefCow",
        "head": 240,
        "temp": 115,
        "bufferHours": 38
      }
    }
  ],
  "limitations": [
    "Estimates assume standard, average conditions — local rules, pricing, and materials vary.",
    "Results are rounded for readability; add a buffer before ordering, booking, or committing.",
    "Double-check anything with a real cost attached against a local quote."
  ],
  "faq": [
    {
      "q": "Why does water demand double in hot weather?",
      "a": "Cattle regulate body temperature partly through water intake and respiration, and above roughly 90-95°F ambient, intake can run 1.5-2x the cool-weather baseline. Wells and pipelines sized only for average demand routinely run short exactly during the hottest, highest-risk days."
    },
    {
      "q": "How many gallons per minute should a well realistically deliver?",
      "a": "Divide your daily gallon need by the hours per day you can realistically pump (often 18-20 hours to leave a service margin), not by 24, since wells need some recovery time and you want a buffer for equipment downtime."
    },
    {
      "q": "Does trough placement matter as much as total volume?",
      "a": "Yes — even with enough total capacity, cattle will crowd and under-drink if a single trough can't refill fast enough during peak demand hours (typically mid-morning and early evening). Multiple smaller access points often outperform one large trough with the same total flow."
    },
    {
      "q": "How much storage buffer should I plan for?",
      "a": "24 hours is a reasonable minimum for most operations, but if you're on a single well with no backup power, 48-72 hours of storage protects against a pump failure or power outage during a heat event when animals can't wait for a repair truck."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/irrigation-pumping-cost",
    "https://www.revenuelab.fyi/toolbox/grazing-carrying-capacity",
    "https://www.revenuelab.fyi/toolbox/dairy-feed-cost-per-cwt"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Livestock Water Requirement Calculator (https://www.revenuelab.fyi/toolbox/livestock-water-requirement)"
}