JIS B9 in pixels
531 × 756 px
at 300 DPI, the print standard · JIS B9 is 45 × 64 mm · 0.4 megapixels
JIS B9 size in pixels has no single answer, because a pixel is a length only once a resolution decides how many fit in an inch. The JIS B9 pixel size is 531 × 756 px at the 300 DPI print standard and 128 × 181 px at the 72 DPI screen convention — every resolution in between is in the table below.
JIS B9 at every resolution
A sheet of paper has no pixel size of its own. It has a physical size — 45 × 64 mm, or 1.77 × 2.52 inches — and a pixel count only appears once you choose how many pixels go in each inch.
| Resolution | Pixels | Megapixels | Uncompressed 24-bit | Use |
|---|---|---|---|---|
| 72 DPI | 128 × 181 | 0.0 MP | 0.1 MB | Screen only — visibly soft in print |
| 96 DPI | 170 × 242 | 0.0 MP | 0.1 MB | Screen only — visibly soft in print |
| 150 DPI | 266 × 378 | 0.1 MP | 0.3 MB | Drafts, internal documents, large-format viewed from a distance |
| 200 DPI | 354 × 504 | 0.2 MP | 0.5 MB | Acceptable for office printing |
| 300 DPI | 531 × 756 | 0.4 MP | 1.1 MB | The commercial print standard |
| 400 DPI | 709 × 1008 | 0.7 MP | 2.0 MB | Fine detail and small type |
| 600 DPI | 1063 × 1512 | 1.6 MP | 4.6 MB | Line art, technical drawings, archival scanning |
| 1200 DPI | 2126 × 3024 | 6.4 MP | 18 MB | Archival and reproduction work |
What the file size means for JIS B9
At 300 DPI an uncompressed JIS B9 is 1.1 MB, and at 600 DPI it is 4.6 MB — four times as much, because doubling the resolution doubles both dimensions. That squaring is the reason large formats become unwieldy so quickly: the same 300 DPI that produces a manageable file at small sizes produces 1.1 MB here.
If a file is going to a printer, ask what they want before choosing. 300 DPI is the safe default and 150 is often enough for anything read from more than arm's length.
Setting up the canvas
Width: 531 px
Height: 756 px
Resolution: 300 pixels/inch
Colour: CMYK for print, RGB for screen
Bleed: 3 mm on every edge → 602 × 827 pxThe bleed figure is the one people forget: artwork that runs to the edge must extend 3 mm past it on all four sides, so the working canvas is larger than the finished sheet.
Frequently asked questions
What is JIS B9 in pixels?
There is no single answer — it depends on the resolution. At the print standard of 300 DPI, JIS B9 is 531 × 756 pixels. On screen at 72 DPI it is only 128 × 181.
What resolution should an JIS B9 document be?
300 DPI for anything going to a commercial printer, which makes the canvas 531 × 756 pixels. 150 DPI (266 × 378) is acceptable for a draft or an internal document. Large formats read from a distance can go lower — a poster viewed from two metres looks sharp at 150 DPI, and dropping to it here saves 0.9 MB of file.
How big is an JIS B9 file at 300 DPI?
About 1.1 MB uncompressed at 24-bit colour — 531 × 756 × 3 bytes. Compression brings that down a great deal for flat artwork and very little for a photograph, which is why a print-ready JIS B9 PDF is usually tens of megabytes.
How many megapixels is JIS B9 at 300 DPI?
0.4 megapixels. For comparison, JIS B9 at 600 DPI is 1.6 MP — quadruple, because doubling the resolution doubles both dimensions.
Other sizes in pixels
- A0 in pixels — 9933 × 14043
- A1 in pixels — 7016 × 9933
- A2 in pixels — 4961 × 7016
- A3 in pixels — 3508 × 4961
- A4 in pixels — 2480 × 3508
- A5 in pixels — 1748 × 2480
- A6 in pixels — 1240 × 1748
- A7 in pixels — 874 × 1240
- A8 in pixels — 614 × 874
- A9 in pixels — 437 × 614
- A10 in pixels — 307 × 437
- B0 in pixels — 11811 × 16701
- B1 in pixels — 8350 × 11811
- B2 in pixels — 5906 × 8350
- B3 in pixels — 4169 × 5906
- B4 in pixels — 2953 × 4169
- B5 in pixels — 2079 × 2953
- B6 in pixels — 1476 × 2079
- B7 in pixels — 1039 × 1476
- B8 in pixels — 732 × 1039
- C4 in pixels — 2705 × 3827
- C5 in pixels — 1913 × 2705
- C6 in pixels — 1346 × 1913
- DL in pixels — 1299 × 2598
JIS B9 in millimetres, inches and points · All paper sizes · Screen resolutions