A3 at 600 DPI is 7016 × 9921 pixels
A3 (297 × 420 mm) at 600 DPI is 7016 × 9921 pixels, which is 70 megapixels.
| Portrait | 7016 × 9921 pixels |
|---|---|
| Landscape | 9921 × 7016 pixels |
| With 3 mm bleed | 7157 × 10063 pixels |
| Megapixels | 70 |
| Aspect ratio | 1.41:1 (1 to √2 before rounding) |
| File size | 199 MB as uncompressed 8-bit RGB; a JPEG or PNG is smaller |
| Paper size | 297 × 420 mm (11.69 × 16.54 in) |
The working
Pixels are inches multiplied by the resolution, and an inch is 25.4 mm.
- Width: 297 mm ÷ 25.4 = 11.693 in; 11.693 in × 600 = 7,015.7, which rounds to 7016 pixels.
- Height: 420 mm ÷ 25.4 = 16.535 in; 16.535 in × 600 = 9,921.3, which rounds to 9921 pixels.
Bleed is extra image past the trim line, so that a cut that lands slightly off still leaves ink to the edge. Print shops usually ask for 3 mm on every side of an A-series page, which makes the file 7157 × 10063 pixels.
Is your photo big enough?
To fill A3 at 600 DPI an image needs at least 7016 × 9921 pixels. Cropped to fill the sheet:
- A 12 megapixel phone photo (4000 × 3000) gives 242 DPI: short of 600, so it would be upscaled or printed softer.
- A 24 megapixel camera photo (6000 × 4000) gives 342 DPI: short of 600, so it would be upscaled or printed softer.
- A 48 megapixel photo (8000 × 6000) gives 484 DPI: short of 600, so it would be upscaled or printed softer.
At 600 DPI the pixels of a print blend together from about 5.7 inches (15 cm) away. 600 DPI is used for line art, small text and scans that will be enlarged. It is also the native resolution of many office laser printers.
A3 at other resolutions
| Resolution | Pixels | With bleed | Megapixels | Uncompressed |
|---|---|---|---|---|
| 72 DPI | 842 × 1191 | 859 × 1208 | 1 | 2.9 MB |
| 96 DPI | 1123 × 1587 | 1145 × 1610 | 1.8 | 5.1 MB |
| 100 DPI | 1169 × 1654 | 1193 × 1677 | 1.9 | 5.5 MB |
| 150 DPI | 1754 × 2480 | 1789 × 2516 | 4.3 | 12 MB |
| 200 DPI | 2339 × 3307 | 2386 × 3354 | 7.7 | 22 MB |
| 240 DPI | 2806 × 3969 | 2863 × 4025 | 11 | 32 MB |
| 300 DPI | 3508 × 4961 | 3579 × 5031 | 17 | 50 MB |
| 400 DPI | 4677 × 6614 | 4772 × 6709 | 31 | 89 MB |
| 600 DPI | 7016 × 9921 | 7157 × 10063 | 70 | 199 MB |
| 1200 DPI | 14031 × 19843 | 14315 × 20126 | 278 | 797 MB |
Other sizes at 600 DPI
- A0
- A1
- A2
- A4
- A5
- A6
- A7
- Letter
- Legal
- Tabloid
- Half Letter
- 4 × 6 in
- 5 × 7 in
- 8 × 10 in
- 11 × 14 in
- 16 × 20 in
- 12 × 12 in
- 12 × 18 in
- 18 × 24 in
- 24 × 36 in
- Business card
A3 is two A4 pages side by side, used for small posters, drawings and spreads. See A3 in pixels at every resolution or everything at 600 DPI.