Dimensions of paper A3 in millimeters, inches and pixels.
A3 paper dimensions in mm and inches
- Millimeters: 297 mm x 420 mm
- Inches: 11.69 in x 16.54 in
A3 in pixels
A3 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 A3 is 3508 x 4960 px.
For printing you often use 200-300 PPI
- 72 DPI/PPI – 842 x 1191 px
- 96 DPI/PPI – 1123 x 1587 px
- 150 DPI/PPI – 1754 x 2480 px
- 300 DPI/PPI – 3508 x 4960 px (high quality print)
A3 in mm/cm
- A3 paper size in millimeters is 297 x 420 mm.
- 29.7 x 42 centimeters.
A3 in inches
- A3 paper size in inches is 11.7 x 16.5 in.
More info about the format A3
A3 is a standard paper size that is commonly used for printing documents, posters, and presentations. It is part of the ISO 216 standard for paper sizes and is roughly equivalent to 11″ x 17″ in the US paper size system.
A3 paper is slightly larger than A4 (which is 210mm x 297mm) and is often used for printing two-page spreads, architectural and engineering drawings, and posters. It is also a popular size for foldable brochures and booklets.
A3 paper is available in a variety of weights and finishes, including matte, glossy, and coated, making it suitable for a range of printing applications. Additionally, it is widely available from office supply stores and online retailers.
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.