{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "acrylic-and-polycarbonate-sheet-thickness",
 "name": "Acrylic (PMMA) and polycarbonate sheet thickness: nominal vs actual, 1/8 in = 3 mm, 1/4 in = 5.5 mm, inch and mm (two acrylic tables, three polycarbonate listings)",
 "kind": "standard",
 "category": "Hardware",
 "group": "Materials & stock",
 "year": null,
 "question": "What are the real thicknesses of 1/8, 3/16, 1/4, 3/8 and 1/2 inch acrylic and polycarbonate sheet in inches and millimetres?",
 "tags": [
  "acrylic",
  "pmma",
  "plexiglass",
  "polycarbonate",
  "lexan",
  "sheet",
  "thickness",
  "plastic stock",
  "perspex"
 ],
 "aliases": [
  "acrylic sheet thickness",
  "acrylic sheet actual thickness",
  "1/4 acrylic thickness mm",
  "1/8 acrylic 3mm",
  "plexiglass thickness chart",
  "cast acrylic 5.5 mm",
  "acrylic thickness tolerance",
  "polycarbonate sheet thickness",
  "lexan sheet thickness",
  "polycarbonate 1/8 inch",
  "polycarbonate 0.093",
  "lexan 9034 thickness",
  "acrylic 3/16 4.5mm",
  "acrylic sheet sizes mm to inch",
  "pmma sheet standard thickness"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/acrylic-and-polycarbonate-sheet-thickness/",
 "sheet_txt": "https://xemstudio.com/objects/acrylic-and-polycarbonate-sheet-thickness/sheet.txt",
 "sheet": {
  "basis": "Acme Plastics and A&C Plastics acrylic thickness tables compared row by row; Lexan 9034 listings from Aircraft Spruce, K-Mac and U.S. Plastic",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Acrylic (PMMA) sheet sold in inch sizes is often not the inch thickness on the label: a '1/4 in' cast acrylic sheet is 5.5 mm (0.217 to 0.220 in) because cast sheet is made in metric steps; the A&C chart also lists a 6 mm / 0.236 in sheet under 1/4 in. Acme prints the thickness tolerance as ±10 % (often under 5 %), which can vary across a sheet, so design slots and pockets with the real sheet in hand.",
   "Where the two acrylic tables disagree: 1/4 in is .217 (Acme) vs .220 (A&C), and 3/4 in is .709 vs .708, 1 in is .945 vs .944. Those are rounding of the same 5.5, 18 and 24 mm values (5.5 mm = 0.2165 in, 18 mm = 0.7087 in, 24 mm = 0.9449 in), shown as printed. Acme also lists 0.06 / 0.08 / 0.09 / 0.098 in nominal sheets at 1.5 / 2 / 2.3 / 2.5 mm, without inch values.",
   "Polycarbonate: three distributors list Lexan 9034 in inch nominal thicknesses (.060, .062, .093, .094, .118, .125, .188, .250, .375, plus .220 and .472 at U.S. Plastic with mm 5.5 and 12.7 printed in the product title). Unlike acrylic, the thicknesses .125, .250 and .375 are listed as such, but no distributor's tolerance statement was read, so none is claimed; polycarbonate is also sold in metric thicknesses by other makers (not read).",
   "No STEP/STL: a sheet is a plain box. Left out: sheet widths and lengths (distributors list many; 4 × 8 ft and 48 × 96 in appear in the sources), extruded sheet (thinner tolerance differs), nylon, HDPE, UHMW, PTFE and acetal sheet (no table read)."
  ],
  "table": {
   "columns": [
    "sheet and nominal thickness",
    "actual mm",
    "actual inch, Acme",
    "actual inch, A&C / PC distributors",
    "source"
   ],
   "rows": [
    [
     "acrylic, 0.06 in",
     "1.5",
     "—",
     "—",
     "Acme"
    ],
    [
     "acrylic, 0.08 in",
     "2",
     "—",
     "—",
     "Acme"
    ],
    [
     "acrylic, 0.09 in",
     "2.3",
     "—",
     "—",
     "Acme"
    ],
    [
     "acrylic, 0.098 in",
     "2.5",
     "—",
     "—",
     "Acme"
    ],
    [
     "acrylic, 1/8 in",
     "3",
     ".118",
     ".118",
     "Acme and A&C"
    ],
    [
     "acrylic, 3/16 in",
     "4.5",
     ".177",
     ".177",
     "Acme and A&C"
    ],
    [
     "acrylic, 1/4 in",
     "5.5",
     ".217",
     ".220",
     "Acme and A&C"
    ],
    [
     "acrylic, 1/4 in (6 mm)",
     "6",
     "—",
     ".236",
     "A&C"
    ],
    [
     "acrylic, 3/8 in",
     "9",
     ".354",
     ".354",
     "Acme and A&C"
    ],
    [
     "acrylic, 1/2 in",
     "12",
     ".472",
     ".472",
     "Acme and A&C"
    ],
    [
     "acrylic, 3/4 in",
     "18",
     ".709",
     ".708",
     "Acme and A&C"
    ],
    [
     "acrylic, 1 in",
     "24",
     ".945",
     ".944",
     "Acme and A&C"
    ],
    [
     "acrylic, 1-1/4 in",
     "30",
     "1.18",
     "—",
     "Acme"
    ],
    [
     "acrylic, 1-1/2 in",
     "38",
     "1.50",
     "—",
     "Acme"
    ],
    [
     "acrylic, 2 in",
     "50",
     "1.97",
     "—",
     "Acme"
    ],
    [
     "acrylic, 2-1/2 in",
     "60",
     "2.36",
     "—",
     "Acme"
    ],
    [
     "acrylic, 3 in",
     "75",
     "2.95",
     "—",
     "Acme"
    ],
    [
     "polycarbonate (Lexan 9034), 0.060 in",
     "—",
     "—",
     "0.060",
     "Aircraft Spruce"
    ],
    [
     "polycarbonate (Lexan 9034), 0.062 in",
     "—",
     "—",
     "0.062",
     "K-Mac"
    ],
    [
     "polycarbonate (Lexan 9034), 0.093 in",
     "2.4 (U.S. Plastic title)",
     "—",
     "0.093",
     "U.S. Plastic; Aircraft Spruce"
    ],
    [
     "polycarbonate (Lexan 9034), 0.094 in",
     "—",
     "—",
     "0.094",
     "K-Mac"
    ],
    [
     "polycarbonate (Lexan 9034), 0.118 in",
     "—",
     "—",
     "0.118",
     "Aircraft Spruce"
    ],
    [
     "polycarbonate (Lexan 9034), 0.125 in",
     "—",
     "—",
     "0.125",
     "K-Mac"
    ],
    [
     "polycarbonate (Lexan 9034), 0.188 in",
     "—",
     "—",
     "0.188",
     "K-Mac"
    ],
    [
     "polycarbonate (Lexan 9034), 0.220 in",
     "5.5 (U.S. Plastic title)",
     "—",
     "0.220",
     "U.S. Plastic"
    ],
    [
     "polycarbonate (Lexan 9034), 0.250 in",
     "—",
     "—",
     "0.250",
     "K-Mac"
    ],
    [
     "polycarbonate (Lexan 9034), 0.375 in",
     "—",
     "—",
     "0.375",
     "K-Mac"
    ],
    [
     "polycarbonate (Lexan 9034), 0.472 in",
     "12.7 (U.S. Plastic title)",
     "—",
     "0.472",
     "U.S. Plastic"
    ]
   ]
  }
 },
 "sheet_text": "Acrylic (PMMA) and polycarbonate sheet thickness: nominal vs actual, 1/8 in = 3 mm, 1/4 in = 5.5 mm, inch and mm (two acrylic tables, three polycarbonate listings) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/acrylic-and-polycarbonate-sheet-thickness/  (sheet CC BY 4.0)\nBasis: Acme Plastics and A&C Plastics acrylic thickness tables compared row by row; Lexan 9034 listings from Aircraft Spruce, K-Mac and U.S. Plastic\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Acrylic (PMMA) sheet sold in inch sizes is often not the inch thickness on the label: a '1/4 in' cast acrylic sheet is 5.5 mm (0.217 to 0.220 in) because cast sheet is made in metric steps; the A&C chart also lists a 6 mm / 0.236 in sheet under 1/4 in. Acme prints the thickness tolerance as ±10 % (often under 5 %), which can vary across a sheet, so design slots and pockets with the real sheet in hand.\n- Where the two acrylic tables disagree: 1/4 in is .217 (Acme) vs .220 (A&C), and 3/4 in is .709 vs .708, 1 in is .945 vs .944. Those are rounding of the same 5.5, 18 and 24 mm values (5.5 mm = 0.2165 in, 18 mm = 0.7087 in, 24 mm = 0.9449 in), shown as printed. Acme also lists 0.06 / 0.08 / 0.09 / 0.098 in nominal sheets at 1.5 / 2 / 2.3 / 2.5 mm, without inch values.\n- Polycarbonate: three distributors list Lexan 9034 in inch nominal thicknesses (.060, .062, .093, .094, .118, .125, .188, .250, .375, plus .220 and .472 at U.S. Plastic with mm 5.5 and 12.7 printed in the product title). Unlike acrylic, the thicknesses .125, .250 and .375 are listed as such, but no distributor's tolerance statement was read, so none is claimed; polycarbonate is also sold in metric thicknesses by other makers (not read).\n- No STEP/STL: a sheet is a plain box. Left out: sheet widths and lengths (distributors list many; 4 × 8 ft and 48 × 96 in appear in the sources), extruded sheet (thinner tolerance differs), nylon, HDPE, UHMW, PTFE and acetal sheet (no table read).\n\nsheet and nominal thickness  actual mm  actual inch, Acme  actual inch, A&C / PC distributors  source\nacrylic, 0.06 in  1.5  —  —  Acme\nacrylic, 0.08 in  2  —  —  Acme\nacrylic, 0.09 in  2.3  —  —  Acme\nacrylic, 0.098 in  2.5  —  —  Acme\nacrylic, 1/8 in  3  .118  .118  Acme and A&C\nacrylic, 3/16 in  4.5  .177  .177  Acme and A&C\nacrylic, 1/4 in  5.5  .217  .220  Acme and A&C\nacrylic, 1/4 in (6 mm)  6  —  .236  A&C\nacrylic, 3/8 in  9  .354  .354  Acme and A&C\nacrylic, 1/2 in  12  .472  .472  Acme and A&C\nacrylic, 3/4 in  18  .709  .708  Acme and A&C\nacrylic, 1 in  24  .945  .944  Acme and A&C\nacrylic, 1-1/4 in  30  1.18  —  Acme\nacrylic, 1-1/2 in  38  1.50  —  Acme\nacrylic, 2 in  50  1.97  —  Acme\nacrylic, 2-1/2 in  60  2.36  —  Acme\nacrylic, 3 in  75  2.95  —  Acme\npolycarbonate (Lexan 9034), 0.060 in  —  —  0.060  Aircraft Spruce\npolycarbonate (Lexan 9034), 0.062 in  —  —  0.062  K-Mac\npolycarbonate (Lexan 9034), 0.093 in  2.4 (U.S. Plastic title)  —  0.093  U.S. Plastic; Aircraft Spruce\npolycarbonate (Lexan 9034), 0.094 in  —  —  0.094  K-Mac\npolycarbonate (Lexan 9034), 0.118 in  —  —  0.118  Aircraft Spruce\npolycarbonate (Lexan 9034), 0.125 in  —  —  0.125  K-Mac\npolycarbonate (Lexan 9034), 0.188 in  —  —  0.188  K-Mac\npolycarbonate (Lexan 9034), 0.220 in  5.5 (U.S. Plastic title)  —  0.220  U.S. Plastic\npolycarbonate (Lexan 9034), 0.250 in  —  —  0.250  K-Mac\npolycarbonate (Lexan 9034), 0.375 in  —  —  0.375  K-Mac\npolycarbonate (Lexan 9034), 0.472 in  12.7 (U.S. Plastic title)  —  0.472  U.S. Plastic\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Acme Plastics: Acrylic sheet thickness: nominal vs actual mm and inch (tolerance +/- 10%, often under 5%) — web — Publisher's page; dimensions are facts — https://www.acmeplastics.com/acrylic-sheets/acrylic-cast-clear-sheet\n- A&C Plastics: Thickness conversion chart: nominal, decimal inch and mm for acrylic sheet — web — Publisher's page; dimensions are facts — https://www.acplasticsinc.com/pages/thicknessconversioncharts\n- Aircraft Spruce: Lexan polycarbonate sheet thicknesses .060, .093, .118 in — web — Publisher's page; dimensions are facts — https://www.aircraftspruce.com/catalog/mepages/2024_leadedge.php\n- K-Mac Plastics: Lexan 9034 sheet thicknesses .062, .094, .125, .188, .250, .375 in (48 x 96 in) — web — Publisher's page; dimensions are facts — https://kmac-distribution.com/plastics/lexan-9034-sheets.htm\n- U.S. Plastic Corp: Clear LEXAN 9034 polycarbonate sheet: 0.093 in (2.4 mm), 0.220 in (5.5 mm), 0.472 in (12.7 mm) — web — Publisher's page; dimensions are facts — https://www.usplastic.com/catalog/item.aspx?itemid=28089\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=acrylic-and-polycarbonate-sheet-thickness\n",
 "sources": [
  {
   "publisher": "Acme Plastics",
   "title": "Acrylic sheet thickness: nominal vs actual mm and inch (tolerance +/- 10%, often under 5%)",
   "url": "https://www.acmeplastics.com/acrylic-sheets/acrylic-cast-clear-sheet",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "A&C Plastics",
   "title": "Thickness conversion chart: nominal, decimal inch and mm for acrylic sheet",
   "url": "https://www.acplasticsinc.com/pages/thicknessconversioncharts",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Aircraft Spruce",
   "title": "Lexan polycarbonate sheet thicknesses .060, .093, .118 in",
   "url": "https://www.aircraftspruce.com/catalog/mepages/2024_leadedge.php",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "K-Mac Plastics",
   "title": "Lexan 9034 sheet thicknesses .062, .094, .125, .188, .250, .375 in (48 x 96 in)",
   "url": "https://kmac-distribution.com/plastics/lexan-9034-sheets.htm",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "U.S. Plastic Corp",
   "title": "Clear LEXAN 9034 polycarbonate sheet: 0.093 in (2.4 mm), 0.220 in (5.5 mm), 0.472 in (12.7 mm)",
   "url": "https://www.usplastic.com/catalog/item.aspx?itemid=28089",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "plywood-and-drywall",
  "sheet-metal-gauge-chart-steel-galvanized-stainless-aluminum",
  "bar-stock-sizes-round-square-steel-aluminum",
  "acrylic-tube-od-wall-sizes",
  "acetal-delrin-rod-diameters",
  "nylon-hdpe-uhmw-ptfe-rod-and-sheet-sizes"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [],
 "faq": [
  {
   "q": "How thick is 1/4 inch acrylic sheet?",
   "a": "5.5 mm, i.e. 0.217 in (Acme) to 0.220 in (A&C); A&C also lists a 6 mm (0.236 in) sheet under the 1/4 in label."
  },
  {
   "q": "How thick is 1/8 inch acrylic?",
   "a": "3 mm (0.118 in)."
  },
  {
   "q": "What is the tolerance on acrylic sheet thickness?",
   "a": "Acme prints ±10 %, often under 5 %."
  },
  {
   "q": "What thicknesses does Lexan 9034 polycarbonate come in?",
   "a": "Inch nominals read here: .060, .062, .093, .094, .118, .125, .188, .220, .250, .375 and .472."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/acrylic-and-polycarbonate-sheet-thickness/index.md"
}