A3 pixels
How Many Pixels is A3 Size?
A3 paper is 297 x 420 mm. At 300 DPI portrait, it requires 3508 x 4961 pixels (4961 x 3508 landscape).
FAQ
Notes
What is A3 size in pixels at 300 DPI?
At 300 DPI, standard A3 is 3508 x 4961 pixels. With a standard 3mm bleed on all sides, the canvas should be 3579 x 5031 pixels (303 x 426 mm).
Can posters use 150 DPI instead?
For wall posters viewed from 1-2 meters away, 150-200 DPI is often acceptable. For close-up reading or portfolios, maintain 300 DPI.
How does A3 relate to A4?
A3 is exactly twice the area of A4 (two A4 sheets side-by-side).