A3 Paper Size And Dimensions

A3 paper size, A3 sheet size, A3 paper size in mm, cm, meter, inches and feet. Finally all A3 paper size data in one place.

A3 paper size is an ISO standard size, used in Europe and almost all around the world, except for North America, parts of South America and the Philippines. A3 is part of the A series.

One sheet of A3 paper is exactly the double of the A4 size and the half of the A2 size.

A3 Paper Size Dimensions

We give you the exact size of a sheet of A3 paper in different units.

  • A3 paper size in millimeters: 420 mm x 297 mm.
  • A3 paper size in centimeters: 42 cm x 29.7 cm.
  • A3 paper size in inches: 16 1/2 by 11 2/3 inches.

Area Of One Sheet Of A3 Paper

The A series papers, such as A3, are the only type of paper where the original dimensions are based on the area of the sheet. A0 is 1 square meter, and all other units derive from that.

The area of one sheet of A3 paper is:

  • Exactly 1/8 square meter. That's 0.125 square meters.
  • 193.3474 square inches.
  • 1.3427 square feet.

A3 Size In Pixels

It is an evergreen question regarding paper sizes, including the A3 size, that how much they measure in pixels. This is most frequently asked when someone wants to print out a design into a sheet of A3 paper, and they want to know how many pixels wide and long the design should be so that it would have a perfect resolution after printing.

Unfortunately there is no exact correspondence between the A3 paper size and pixels. This depends of the resolution of your device, such as screen or printer).

Native screen resolution in DPI varies a lot, but it's generally between 100 and 120 DPI. 72 DPI for monitors is just a myth. Your printer at home or at the office typically uses 300 DPI. When using a professional printing service, the resolution can vary between 250 DPI and 600 DPI, but you can find professional printers that use a much higher resolution, like 1200 DPI.

We give you some pixel data for a sheet of A3 paper based on different resolutions, but it is of upmost importance to know your exact printing resolution before designing!

A3 size in pixels, depending on the resolution:

  • A3 size in pixels when using 96 DPI: 1587 x 1123 pixels.
  • A3 size in pixels when using 100 DPI: 1654 x 1169 pixels.
  • A3 size in pixels when using 120 DPI: 1984 x 1403 pixels.
  • A3 size in pixels when using 300 DPI: 4961 x 3508 pixels.
  • A3 size in pixels when using 600 DPI: 9921 x 7016 pixels.

A3 Paper Size in mm