What Size Is A3 in Inches?
A3 paper is 11.69 × 16.54 inches (297 × 420 mm). It is exactly twice the area of A4 paper and is commonly used for posters, large printouts, and architectural drawings.
A3 Conversion Table
| Unit | Width | Height |
|---|---|---|
| Millimeters | 297 | 420 |
| Centimeters | 29.7 | 42.0 |
| Inches | 11.69 | 16.54 |
| Pixels @ 300 DPI | 3508 | 4961 |
| Pixels @ 150 DPI | 1754 | 2480 |
A3 vs US Tabloid (11×17)
| Property | A3 | US Tabloid |
|---|---|---|
| Inches | 11.69 × 16.54 | 11 × 17 |
| Millimeters | 297 × 420 | 279 × 432 |
| Area (sq in) | 193.34 | 187.00 |
A3 is slightly wider and shorter than Tabloid. Most A3-capable printers also support Tabloid size.
Common Uses for A3
- Posters and signage
- Architectural and engineering drawings
- Large spreadsheets and diagrams
- Art prints
- Menu boards
Related Sizes
- A2 (twice A3): 16.54 × 23.39 inches
- A4 (half of A3): 8.27 × 11.69 inches
- C3 envelope fits A3 unfolded
For all sizes, see A Series Paper Sizes. Compare with US Paper Sizes.
Frequently Asked Questions
What is A3 paper size in inches?
A3 paper measures 11.69 x 16.54 inches (297 x 420 millimeters). It is exactly twice the size of A4 paper.
Is A3 the same as Tabloid?
No. A3 (11.69 x 16.54 inches) is slightly different from US Tabloid (11 x 17 inches). A3 is 0.69 inches narrower and 0.46 inches shorter than Tabloid.
How many pixels is A3 at 300 DPI?
A3 at 300 DPI is 3508 x 4961 pixels. At 150 DPI, it is 1754 x 2480 pixels.