{
  "tool": "room-size",
  "version": "1.0.0",
  "inputs": {
    "shape": "rectangle",
    "room_width_cm": 350,
    "room_length_cm": 400,
    "part2_length_cm": 200,
    "part2_depth_cm": 150,
    "bay": "none",
    "bay_width_cm": 200,
    "bay_depth_cm": 60,
    "ceiling_height_cm": 240,
    "doors": 1
  },
  "answer": {
    "area_m2": 14,
    "area_sq_ft": 151,
    "parts": {
      "main_m2": 14,
      "part2_m2": 0,
      "bay_m2": 0
    },
    "perimeter_cm": 1500,
    "walls_cm": [
      350,
      400,
      350,
      400
    ],
    "skirting_cm": 1423.8,
    "skirting_boards": [
      {
        "board_cm": 240,
        "count": 8
      },
      {
        "board_cm": 305,
        "count": 8
      },
      {
        "board_cm": 420,
        "count": 4
      }
    ],
    "volume_m3": 33.6,
    "volume_cu_ft": 1187,
    "bounds": {
      "width_cm": 350,
      "length_cm": 400
    },
    "carpet": {
      "roll_cm": 400,
      "cut_cm": 420,
      "joins": 0,
      "bought_m2": 16.8
    },
    "average_home_share": 0.15,
    "polygon_cm": [
      [
        0,
        0
      ],
      [
        350,
        0
      ],
      [
        350,
        400
      ],
      [
        0,
        400
      ]
    ]
  },
  "summary": "14 m² (151 sq ft). Bigger than the average bedroom in a home built since 2010 (13.4 m²), and a little under the average new-build living room (17.1 m²). A typical size for a main bedroom or a small living room.",
  "working": [
    "Floor: 3.5 m × 4 m = 14 m²",
    "Total 14 m² = 150.7 sq ft (1 m² = 10.76 sq ft)",
    "Perimeter: 4 walls, 15 m. Skirting: 15 m − 1 × 0.76 m door = 14.24 m",
    "Volume: 14 m² × 2.4 m = 33.6 m³"
  ],
  "notes": [],
  "sources": [
    {
      "label": "DCLG, Technical housing standards: nationally described space standard (March 2015, notes added 19 May 2016), Table 1 and paragraph 10",
      "url": "https://assets.publishing.service.gov.uk/media/6123c60e8fa8f53dd1f9b04d/160519_Nationally_Described_Space_Standard.pdf",
      "checked": "2026-10-31"
    },
    {
      "label": "The Licensing of Houses in Multiple Occupation (Mandatory Conditions of Licences) (England) Regulations 2018 (SI 2018/616), regulation 2",
      "url": "https://www.legislation.gov.uk/uksi/2018/616/regulation/2/made",
      "checked": "2026-10-31"
    },
    {
      "label": "Which? (Garber, 14 Apr 2018), Shrinking homes: the average British house is 20% smaller than in the 1970s (LABC Warranty analysis of 10,000 Zoopla and Rightmove listings)",
      "url": "https://www.which.co.uk/news/2018/04/shrinking-homes-the-average-british-house-20-smaller-than-in-1970s/",
      "checked": "2026-10-31"
    },
    {
      "label": "Statista, Average living room sizes in new British houses 1930–2020 (LABC Warranty data)",
      "url": "https://www.statista.com/statistics/1056003/average-living-room-sizes-new-british-houses-1930-2020",
      "checked": "2026-10-31"
    },
    {
      "label": "MHCLG, English Housing Survey 2018-19, Size of English homes fact sheet",
      "url": "https://assets.publishing.service.gov.uk/media/5f047a01d3bf7f2be8350262/Size_of_English_Homes_Fact_Sheet_EHS_2018.pdf",
      "checked": "2026-10-31"
    },
    {
      "label": "Flooring Hut, What widths do carpets come in?",
      "url": "https://www.flooringhut.co.uk/carpets/guides/what-widths-do-carpets-come-in-and-how-does-this-affect-ordering",
      "checked": "2026-10-31"
    },
    {
      "label": "B&Q, Metsä Wood primed MDF square skirting board, 2.4 m, pack of 4",
      "url": "https://www.diy.com/departments/metsa-wood-primed-white-mdf-square-skirting-board-l-2-4m-w-94mm-t-18mm-pack-of-4/5022652850067_BQ.prd",
      "checked": "2026-10-31"
    },
    {
      "label": "MDF Skirting World, The length option (3050 and 4200 mm)",
      "url": "https://mdfskirtingworld.co.uk/the-length-option",
      "checked": "2026-10-31"
    },
    {
      "label": "Howarth Timber (Green, 14 Sep 2026), UK door sizes",
      "url": "https://www.howarth-timber.co.uk/inspiration-advice/uk-door-sizes",
      "checked": "2026-10-31"
    }
  ],
  "page_url": "https://snuug.app/tools/room-size",
  "snuug": "Snuug is an iPhone app that rebuilds your room in 3D, to within about 3% of its real size, so you can redesign it and see what fits before you buy a thing. Not yet on the App Store (31 October 2026)."
}