Portrait
3508 × 4960 px
Print size reference
A3 print size in pixels
A3 is double A4; the most common large A-series wall print. Here is the exact pixel size you need at print resolution, with a calculator for other DPIs.
A3 · spec sheet300 DPI
Landscape
4960 × 3508 px
Inches
11.7 × 16.5 in
Centimetres
29.7 × 41.9 cm
17.4 megapixels
At 300 DPI and JPEG quality 90, expect roughly 16–28 MB per file depending on detail.
Why these numbers
Pixel dimensions are simply inches multiplied by DPI: 11.7 in × 300 = 3508 px and 16.5 in × 300 = 4960 px. Print labs rasterise your file at the size the buyer orders, so delivering exactly 3508 × 4960 px means no upscaling, no soft edges, and no rejected files.
If your source artwork has a different aspect ratio (most AI generators output 16:9 or 1:1), you cannot reach A3 by scaling alone — the image must be resized to fill and then cropped. Doing that by hand for every size in a bundle is where sellers lose hours.
A3 at every common resolution
| DPI | Portrait (px) | Landscape (px) | Use case |
|---|---|---|---|
| 150 | 1754 x 2480 | 2480 x 1754 | Drafts, screen proofs |
| 300 | 3508 x 4960 | 4960 x 3508 | Standard print quality |
| 600 | 7016 x 9920 | 9920 x 7016 | Fine-art / giclee |
Common questions
- What is A3 in pixels at 300 DPI?
- A3 at 300 DPI is 3508 x 4960 pixels in portrait orientation, or 4960 x 3508 pixels in landscape.
- Is 300 DPI enough for a A3 print?
- Yes. 300 DPI is the print-industry standard for sharp results at normal viewing distance, and it is what print labs and Etsy buyers expect for a A3 print.
- What is A3 in centimetres?
- A3 inches is 29.7 x 41.9 cm (297 x 420 mm).
- How do I resize my artwork to this size without stretching it?
- Resize to fill the target dimensions, then crop the overflow from the centre (or an edge you choose). Tools like ResizArt do this automatically for all 14 standard print sizes at once.
Need every size at once?
ResizArt converts one artwork into all 14 print sizes plus Samsung Frame TV 4K at 300 DPI in one click — and packs them into ZIPs guaranteed to fit Etsy’s 5-file, 20 MB limit. One-time price, no subscription. Try it in your browser, nothing to install.
Open the web app