Size of A3 in pixels, inches, millimeters

Measurements of paper A3.

A3 in millimeters

  • A3 paper size in millimeters is 297 x 420 mm.
  • 29.7 x 42.0 centimeters.
A3 size in millimeters

A3 in inches

  • A3 paper size in inches is 11.7 x 16.5 in.
A3 size in inches

A3 in pixels

A3 paper size in pixels with a resolution of 72 PPI is 842 x 1191 px.
Screens and monitors usually use 72 PPI

In a resolution of 300 PPI A4 is 4961 x 3508 px.
For printing you often use 200-300 PPI

Envelopes for A3 paper.

  • For an unfolded A3 you will need an C3 envelope.
  • Fold the A3 paper once – C4 envelope.

More A papers formats

See all paper sizes in A series.