A3 paper size
11.69 × 16.54 in29.7 × 42 cm
A3 paper measures 297 × 420 mm (11.69 × 16.54 in). It is used for spreads, diagrams and small posters.
Paper size and pixels
Measurements
| Unit | Width × height |
|---|---|
| Millimeters | 297 × 420 mm |
| Centimeters | 29.7 × 42 cm |
| Inches | 11.69 × 16.54 in |
| Points (1/72 in) | 842 × 1191 pt |
| Resolution | Pixels (portrait) |
|---|---|
| 300 DPI (print quality) | 3,508 × 4,961 |
| 150 DPI | 1,754 × 2,480 |
| 96 DPI (screen) | 1,123 × 1,587 |
| 72 DPI | 842 × 1,191 |
What to know
Every ISO A size has the same 1 : √2 proportion, so halving a sheet across its long side gives the next size down with the same shape. That is why an A4 page scales cleanly to A5 or A3 on a copier.
Questions people ask
What size is A3 paper in inches?
11.69 × 16.54 inches.
What size is A3 paper in centimeters?
29.7 × 42 cm.
How many pixels is A3 at 300 DPI?
3,508 × 4,961 pixels in portrait orientation.
Related sizes
Sources and method
Imperial and metric values are converted with 1 in = 25.4 mm exactly and rounded only for display. Found a mistake? Report it and we will correct the page.