{
  "name": "PDF to PNG pixel dimensions and RGBA working-memory reference",
  "version": "2026-07-11-v105",
  "license": "CC BY 4.0",
  "canonical": "https://gopdfconverter.com/research/pdf-to-png-resolution-chart/",
  "formula": {
    "widthPx": "round(page width in PDF points × DPI ÷ 72)",
    "heightPx": "round(page height in PDF points × DPI ÷ 72)",
    "rgbaBytes": "widthPx × heightPx × 4"
  },
  "scope": "Portrait and landscape A4, US Letter, US Legal, and Tabloid pages at 36, 72, 96, 150, 200, 300, 600, and 1200 DPI.",
  "limitations": [
    "RGBA memory is one uncompressed four-byte-per-pixel buffer, not predicted PNG file size or peak browser memory.",
    "PNG compression depends on page content and cannot be derived from page size and DPI alone.",
    "Higher DPI cannot restore detail missing from embedded source images."
  ],
  "rows": [
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 36,
      "widthPx": 306,
      "heightPx": 396,
      "megapixels": 0.1212,
      "rgbaBytes": 484704,
      "rgbaMiB": 0.46
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 72,
      "widthPx": 612,
      "heightPx": 792,
      "megapixels": 0.4847,
      "rgbaBytes": 1938816,
      "rgbaMiB": 1.85
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 96,
      "widthPx": 816,
      "heightPx": 1056,
      "megapixels": 0.8617,
      "rgbaBytes": 3446784,
      "rgbaMiB": 3.29
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 150,
      "widthPx": 1275,
      "heightPx": 1650,
      "megapixels": 2.1037,
      "rgbaBytes": 8415000,
      "rgbaMiB": 8.03
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 200,
      "widthPx": 1700,
      "heightPx": 2200,
      "megapixels": 3.74,
      "rgbaBytes": 14960000,
      "rgbaMiB": 14.27
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 300,
      "widthPx": 2550,
      "heightPx": 3300,
      "megapixels": 8.415,
      "rgbaBytes": 33660000,
      "rgbaMiB": 32.1
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 600,
      "widthPx": 5100,
      "heightPx": 6600,
      "megapixels": 33.66,
      "rgbaBytes": 134640000,
      "rgbaMiB": 128.4
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "portrait",
      "widthPt": 612,
      "heightPt": 792,
      "dpi": 1200,
      "widthPx": 10200,
      "heightPx": 13200,
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      "rgbaMiB": 513.61
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
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      "heightPt": 612,
      "dpi": 36,
      "widthPx": 396,
      "heightPx": 306,
      "megapixels": 0.1212,
      "rgbaBytes": 484704,
      "rgbaMiB": 0.46
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "landscape",
      "widthPt": 792,
      "heightPt": 612,
      "dpi": 72,
      "widthPx": 792,
      "heightPx": 612,
      "megapixels": 0.4847,
      "rgbaBytes": 1938816,
      "rgbaMiB": 1.85
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
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      "heightPt": 612,
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      "rgbaMiB": 3.29
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
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      "heightPt": 612,
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      "rgbaMiB": 8.03
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
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      "heightPt": 612,
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      "heightPx": 1700,
      "megapixels": 3.74,
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      "rgbaMiB": 14.27
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "landscape",
      "widthPt": 792,
      "heightPt": 612,
      "dpi": 300,
      "widthPx": 3300,
      "heightPx": 2550,
      "megapixels": 8.415,
      "rgbaBytes": 33660000,
      "rgbaMiB": 32.1
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
      "orientation": "landscape",
      "widthPt": 792,
      "heightPt": 612,
      "dpi": 600,
      "widthPx": 6600,
      "heightPx": 5100,
      "megapixels": 33.66,
      "rgbaBytes": 134640000,
      "rgbaMiB": 128.4
    },
    {
      "page": "letter",
      "pageLabel": "US Letter",
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      "heightPt": 612,
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      "megapixels": 134.64,
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      "rgbaMiB": 513.61
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      "page": "a4",
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      "page": "a4",
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    {
      "page": "a4",
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      "page": "a4",
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