{
  "slug": "14x28-inground-pool-gallons-calculator",
  "title": "14x28 Inground Pool Gallons Calculator",
  "heading": "14x28 Inground Pool Gallons Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/14x28-inground-pool-gallons-calculator",
  "summary": "Water volume, turnover rate, and chemical dosing baseline for a 14x28 rectangular pool.",
  "description": "14 by 28 feet is one of the most common inground rectangular pool sizes, and knowing the gallonage is the starting point for every chemical dose, heater size, and pump turnover calculation you will ever do on it. Volume depends on average depth, not just surface area — a pool sloping from 3.5 feet in the shallow end to 8 feet in the deep end averages about 5.75 feet, not 8. This calculator computes average depth from your two end depths, returns total gallons, and shows the flow rate needed for an 8-hour turnover plus the gallons-per-inch figure that makes top-off and dosing math easy.",
  "formula": "Gallons = Length × Width × Average Depth × 7.48. Average Depth = (Shallow + Deep) ÷ 2. Turnover GPM = Gallons ÷ (Hours × 60).",
  "dateModified": "2026-09-06",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=14x28-inground-pool-gallons-calculator",
  "inputs": [
    {
      "id": "length",
      "label": "Pool length",
      "kind": "number",
      "hint": null,
      "default": 28,
      "unit": "ft",
      "min": 8,
      "max": 80
    },
    {
      "id": "width",
      "label": "Pool width",
      "kind": "number",
      "hint": null,
      "default": 14,
      "unit": "ft",
      "min": 6,
      "max": 40
    },
    {
      "id": "shallow",
      "label": "Shallow end depth",
      "kind": "number",
      "hint": null,
      "default": 3.5,
      "unit": "ft",
      "min": 1,
      "max": 8
    },
    {
      "id": "deep",
      "label": "Deep end depth",
      "kind": "number",
      "hint": null,
      "default": 8,
      "unit": "ft",
      "min": 2,
      "max": 14
    },
    {
      "id": "turnoverHours",
      "label": "Target turnover time",
      "kind": "number",
      "hint": null,
      "default": 8,
      "unit": "hours",
      "min": 4,
      "max": 24
    }
  ],
  "outputs": [
    {
      "id": "gallons",
      "label": "Pool volume",
      "format": "number",
      "hint": null,
      "primary": true
    },
    {
      "id": "avgDepth",
      "label": "Average depth (ft)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "gpm",
      "label": "Pump flow for target turnover (GPM)",
      "format": "number",
      "hint": null,
      "primary": false
    },
    {
      "id": "gallonsPerInch",
      "label": "Gallons per inch of water level",
      "format": "number",
      "hint": null,
      "primary": false
    },
    {
      "id": "surfaceArea",
      "label": "Surface area (sq ft)",
      "format": "number",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Pool length: 28 ft",
      "Pool width: 14 ft",
      "Shallow end depth: 3.5 ft",
      "Deep end depth: 8 ft",
      "Target turnover time: 8 hours"
    ],
    "outputs": [
      "Pool volume: 16,860",
      "Average depth (ft): 5.75",
      "Pump flow for target turnover (GPM): 35",
      "Gallons per inch of water level: 244",
      "Surface area (sq ft): 392"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter pool length (ft).",
      "Enter pool width (ft).",
      "Enter shallow end depth (ft).",
      "Enter deep end depth (ft).",
      "Enter target turnover time (hours).",
      "Read your pool volume 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": {
        "length": 17,
        "width": 8,
        "shallow": 2.1,
        "deep": 4.8,
        "turnoverHours": 5
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "length": 28,
        "width": 14,
        "shallow": 3.5,
        "deep": 8,
        "turnoverHours": 8
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "length": 45,
        "width": 22,
        "shallow": 5.6000000000000005,
        "deep": 12.8,
        "turnoverHours": 13
      }
    }
  ],
  "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": "How many gallons is a 14x28 pool?",
      "a": "With a 3.5-to-8-foot slope the average depth is 5.75 feet, giving about 16,900 gallons. A flat 5-foot depth version holds roughly 14,700."
    },
    {
      "q": "Why does turnover rate matter?",
      "a": "Health codes and filter manufacturers target circulating the entire pool volume every 6-8 hours so chemicals distribute evenly and debris reaches the filter. Undersized flow leaves dead spots and algae."
    },
    {
      "q": "How do I use gallons per inch?",
      "a": "It tells you how much water an inch of evaporation or backwash costs, and it makes partial-drain and dilution math simple when you need to lower cyanuric acid or salt levels."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/16x32-pool-gallons-calculator",
    "https://www.revenuelab.fyi/toolbox/15x30-oval-pool-gallons-calculator"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — 14x28 Inground Pool Gallons Calculator (https://www.revenuelab.fyi/toolbox/14x28-inground-pool-gallons-calculator)"
}