A3 at 300 dpi
3508 × 4961
Print · 1:√2
| Pixel size | 3508 × 4961 px |
|---|---|
| Aspect ratio | 1:√2 (3508:4961) |
| Total pixels | 17,403,188 · 17.4 MP |
| Print size at 300 dpi | 297 × 420 mm |
| Orientation | Portrait |
| Uncompressed size | 49.8 MB |
| Rough JPEG size | 4249 KB |
Print assumes 300 dpi. Divide pixels by 300 for inches, then multiply by 25.4 for millimetres.
How to read this
- If the aspect ratio is wrong, the platform crops it. Matching the ratio matters more than matching the pixel count.
- Print assumes 300 dpi: divide the pixels by 300 for inches, then multiply by 25.4 for millimetres.
- On screen, dpi is irrelevant — only the pixel size counts. Dpi only means something when you print.
- Enlarging a small image makes it blurry. Start bigger than you need and scale down instead.
Frequently asked questions
Q. What size is A3 at 300 dpi?
3508×4961 pixels, a 1:√2 aspect ratio — 17,403,188 pixels in all, about 17.4 megapixels.
Q. How big is A3 at 300 dpi when printed?
At 300 dpi it comes out 297×420 mm — the pixels divided by 300 for inches, then multiplied by 25.4.
Q. How large is a A3 at 300 dpi file?
Uncompressed, roughly 49.8 MB; saved as JPEG, usually around 4249 KB. A photograph and a flat graphic can differ several times over.
Q. What group does A3 at 300 dpi belong to?
The print group, and it is taller than it is wide. Other sizes with the same ratio are listed below.
Same aspect ratio
When the ratio matches you can just resize — no cropping needed.