List of A Papers :
  • A0 sheet of paper
  • A1 sheet of paper
  • A2 sheet of paper
  • A3 sheet of paper
  • A4 sheet of paper
  • A5 sheet of paper
  • A6 sheet of paper
  • A7 sheet of paper
  • A8 sheet of paper
  • A9 sheet of paper
  • A10 sheet of paper

A3 Paper Size

A3 size is worldwidely used in professional and family life, even if it is less used than A4. It is often used for presentations, charts, or enlargements. It is now quite common to find copiers that print A3 size via network in companies.

The A3 is ⅛ an A0. The latter is the reference, because it is the largest A paper standardized by ISO 216. This norm dates from 1975, and comes from an ancient German standard (DIN476 - 1922), that took its own origin in a written source dated 1786 from Lichtenberg. This professor invented the ratio which now allows to use A size paper.

Between all formats, the same proportion is observed: width x √2 = length (or a / b = 2b / a = √2, or 1.4142). This proportion keeps the contents of a sheet when we reduce or enlarge its proportions (when moving from A4 to A3 or vice versa for example).

The width of an A3 corresponds to the length of an A4 while its length corresponds to the width of a A2. A3 measures 420 x 297 mm or 16.54 x 11.69 inches. Its printing surface, including margins, is 394 x 257 millimeters. Its area is 0.125 square meters, or 0.15 square yards,1.35 square foot, 193.75 square inches. A3 is obtained by folding an A2 sheet in the width direction. An A3 folded in the same way is an A4.

We can calculate the weight of an A3 sheet knowing it is ⅛ an A0 sheet (measuring 1 m²). For a paper of 80 g / m², an A3 sheet weighs 80/8 = 10 grams.

The measurements in inches of A3 is 11.69 x 16.54

The size of A3 is 11.69 x 16.54 inches

or 11 11/16 x 16 9/16 inches

The size in centimeters of A3 is 29.7 x 42

The size of A3 is 29.7 x 42 centimeters

or 297 x 420 millimeters

The area of A3 paper sheet:

  • Square yard: 0.15
  • Square foot: 1.35
  • Square inch: 193.75

A3 paper area

Printing area of a sheet of paper A3 is 257 x 394 mm

Print surface A3 : 257 x 394 mm

A3 digital size in 300 dpi is 3508 x 4961 pixels

A3 size in 300 dpi : 3508 x 4961 pixels

A3 digital size in 150 dpi is 1754 x 2481 pixels

A3 size in 150 dpi : 1754 x 2481 pixels

Difference between A3 and all the others paper sizes

Simile A3/A0 Simile A3/A1 Simile A3/A2 Simile A3/A4 Simile A3/A5 Simile A3/A6 Simile A3/A7 Simile A3/A8 Simile A3/A9 Simile A3/A10
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