A3 Size In cm (Centimeter)

What is the exact A3 size in cm (centimeters)? Find out exact A3 paper size dimensions in cm for your printing or designing job.

A3 Paper Size in cm

A3 is an ISO standard paper size, and the actual dimensions are defined in mm. So the A3 size in cm that we give you is precise, not rounded.

The size of one sheet of A3 paper in cm is 42cm x 29.7cm.

Notes To A3 Dimensions in cm

  • cm is an SI unit, the abbreviation of centimetre (international spelling) or centimeter (American spelling).
  • As A3 is an ISO standard paper size, therefore this A3 size in cm information gives you exact data.
  • To find out more information on the A3 paper size, click on the link.

      • a3 paper size cm