Paper size
A3
- 297 × 420 mm
- ISO A
A3 measures 297 × 420 mm, or 11.69 × 16.54 inches. Its aspect ratio is 1.4141:1, close to √2, the property that makes each ISO size two of the next one down.
Dimensions
Millimetres297 × 420 mm
Centimetres29.7 × 42 cm
Inches11.693 × 16.535 in
Points (72 dpi)841.9 × 1,190.6 ptthe PostScript/PDF unit
Area0.12474 m²124,740 mm²
Aspect ratio1.41414:1√2 is 1.41421
At common print resolutions
72 dpi842 × 1191screen preview
150 dpi1754 × 2480draft print
300 dpi3508 × 4961standard print quality
600 dpi7016 × 9921high quality print
The ISO 216 series
SeriesISO A
Halving ruleCut the long side in half to get the next size downthe √2 ratio is what makes this preserve the shape
Sheets of A4 in this size2
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