{
  "slug": "pool-gallons-oval-calculator",
  "title": "Oval Pool Gallons Calculator",
  "heading": "Oval Pool Gallons Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/pool-gallons-oval-calculator",
  "summary": "Convert an oval above-ground pool's length, width, and depth into total gallons.",
  "description": "Oval above-ground pools use an ellipse footprint rather than a true circle, so their gallon calculation swaps in the ellipse area formula — pi times the semi-major axis times the semi-minor axis — in place of the circle formula used for round pools. This calculator takes the pool's overall length and width (the full diameter measurements, not the radii) along with water depth, computes the elliptical surface area, and multiplies by depth and 7.5 gallons per cubic foot to return total gallons. Oval pools are popular for yards that are long and narrow rather than square, letting more swimming length fit a tighter footprint than a round pool of similar surface area would, but their capacity is easy to misjudge without doing the actual ellipse math since the shape reads visually similar to a much smaller circle. As with any above-ground pool, getting an accurate gallon figure matters for dosing shock, chlorine, and algaecide correctly relative to labeled per-10,000-gallon instructions.",
  "formula": "Gallons = π × (Length ÷ 2) × (Width ÷ 2) × Depth × 7.5",
  "dateModified": "2026-09-06",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=pool-gallons-oval-calculator",
  "inputs": [
    {
      "id": "length",
      "label": "Length",
      "kind": "number",
      "hint": null,
      "default": 33,
      "unit": "ft",
      "min": 5,
      "max": 60
    },
    {
      "id": "width",
      "label": "Width",
      "kind": "number",
      "hint": null,
      "default": 18,
      "unit": "ft",
      "min": 5,
      "max": 40
    },
    {
      "id": "depth",
      "label": "Water depth",
      "kind": "number",
      "hint": null,
      "default": 4.5,
      "unit": "ft",
      "min": 1,
      "max": 12
    }
  ],
  "outputs": [
    {
      "id": "gallons",
      "label": "Total pool gallons",
      "format": "number",
      "hint": null,
      "primary": true
    },
    {
      "id": "area",
      "label": "Surface area",
      "format": "number",
      "hint": "sq ft",
      "primary": false
    },
    {
      "id": "cubicFeet",
      "label": "Total cubic feet",
      "format": "number",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Length: 33 ft",
      "Width: 18 ft",
      "Water depth: 4.5 ft"
    ],
    "outputs": [
      "Total pool gallons: 15,745",
      "Surface area: 467",
      "Total cubic feet: 2,099"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter length (ft).",
      "Enter width (ft).",
      "Enter water depth (ft).",
      "Read your total pool gallons 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": 20,
        "width": 11,
        "depth": 2.6999999999999997
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "length": 33,
        "width": 18,
        "depth": 4.5
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "length": 53,
        "width": 29,
        "depth": 7.2
      }
    }
  ],
  "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 is an oval pool's area different from a round pool's?",
      "a": "A round pool uses one radius squared in its area formula, while an oval pool uses two different radii — half the length and half the width — multiplied together, since an ellipse isn't equally wide in every direction."
    },
    {
      "q": "How much water does a typical 33x18 oval pool hold?",
      "a": "At a 4.5 ft depth, a 33x18 oval pool holds roughly 15,700 gallons, comparable to a similarly-sized round pool despite looking narrower along its width."
    },
    {
      "q": "Should I measure the liner or the frame for length and width?",
      "a": "Measure the actual water surface dimensions once filled, not the outer frame or deck footprint, since frame and decking add extra width that isn't part of the water volume."
    },
    {
      "q": "Does this formula work for kidney-shaped pools too?",
      "a": "No, kidney-shaped pools have an irregular curved footprint that the ellipse formula doesn't accurately capture — use a dedicated kidney pool calculator that accounts for the two-radius curved shape instead."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/pool-gallons-round-calculator",
    "https://www.revenuelab.fyi/toolbox/pool-gallons-rectangular-calculator",
    "https://www.revenuelab.fyi/toolbox/pool-gallons-kidney-calculator"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Oval Pool Gallons Calculator (https://www.revenuelab.fyi/toolbox/pool-gallons-oval-calculator)"
}