A3 poster size
A3 poster: 29.7 × 42 cm. In inches this is about 11.693 × 16.535 in.
A3 poster
Posters · Print sizes
29.7 × 42 cm
Standard size (W × H)
Centimetres (cm)
29.7 × 42 cm
Millimetres (mm)
297 × 420 mm
Inches (in)
11.693 × 16.535 in
Area
1,247.4 cm²
Aspect ratio
1 : 1.4141
Width / height
297 / 420
Pixel size at different DPI
| DPI | Width (px) | Height (px) | Total pixels | Typical use |
|---|---|---|---|---|
| 72 DPI | 842 | 1,191 | 1,002,822 (1.0MP) | Screen display |
| 96 DPI | 1,123 | 1,587 | 1,782,201 (1.8MP) | Windows default |
| 150 DPI | 1,754 | 2,480 | 4,349,920 (4.3MP) | Standard print |
| 200 DPI | 2,339 | 3,307 | 7,735,073 (7.7MP) | Good print |
| 300 DPI | 3,508 | 4,961 | 17,403,188 (17MP) | High-quality print |
| 600 DPI | 7,016 | 9,921 | 69,605,736 (70MP) | Professional print |
A3 poster measures 29.7 × 42 cm (297 × 420 mm) and belongs to the Posters group. It is typically used for Advertising and Events.
A3 poster — A3 poster size
A3 poster: 29.7 × 42 cm (297 × 420 mm). Posters.
In inches this is about 11.693 × 16.535 in. The footprint area is about 1,247.4 cm².
300 DPI: 3,508 × 4,961 px.
Common uses
A3 poster · FAQ
How big is A3 poster?
A3 poster: 29.7 × 42 cm (297 × 420 mm).
What is the area of A3 poster?
The footprint area is about 1,247.4 cm².
Where is A3 poster used?
Typical uses include Advertising, Events, Retail display.
Tip: leave a small tolerance when printing or installing; allow 3 mm bleed on each side for print artwork.