ARCH D in pixels
7200 × 10800 px
at 300 DPI, the print standard · ARCH D is 609.6 × 914.4 mm · 77.8 megapixels
ARCH D at every resolution
A sheet of paper has no pixel size of its own. It has a physical size — 609.6 × 914.4 mm, or 24 × 36 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 | 1728 × 2592 | 4.5 MP | 13 MB | Screen only — visibly soft in print |
| 96 DPI | 2304 × 3456 | 8.0 MP | 23 MB | Screen only — visibly soft in print |
| 150 DPI | 3600 × 5400 | 19.4 MP | 56 MB | Drafts, internal documents, large-format viewed from a distance |
| 200 DPI | 4800 × 7200 | 34.6 MP | 99 MB | Acceptable for office printing |
| 300 DPI | 7200 × 10800 | 77.8 MP | 222 MB | The commercial print standard |
| 400 DPI | 9600 × 14400 | 138.2 MP | 396 MB | Fine detail and small type |
| 600 DPI | 14400 × 21600 | 311.0 MP | 890 MB | Line art, technical drawings, archival scanning |
| 1200 DPI | 28800 × 43200 | 1244.2 MP | 3.48 GB | Archival and reproduction work |
What the file size means for ARCH D
At 300 DPI an uncompressed ARCH D is 222 MB, and at 600 DPI it is 890 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 222 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: 7200 px
Height: 10800 px
Resolution: 300 pixels/inch
Colour: CMYK for print, RGB for screen
Bleed: 3 mm on every edge → 7271 × 10871 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 ARCH D in pixels?
There is no single answer — it depends on the resolution. At the print standard of 300 DPI, ARCH D is 7200 × 10800 pixels. On screen at 72 DPI it is only 1728 × 2592.
What resolution should an ARCH D document be?
300 DPI for anything going to a commercial printer, which makes the canvas 7200 × 10800 pixels. 150 DPI (3600 × 5400) 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 167 MB of file.
How big is an ARCH D file at 300 DPI?
About 222 MB uncompressed at 24-bit colour — 7200 × 10800 × 3 bytes. Compression brings that down a great deal for flat artwork and very little for a photograph, which is why a print-ready ARCH D PDF is usually tens of megabytes.
How many megapixels is ARCH D at 300 DPI?
77.8 megapixels. For comparison, ARCH D at 600 DPI is 311.0 MP — quadruple, because doubling the resolution doubles both dimensions.
ARCH D in millimetres, inches and points · All paper sizes · Screen resolutions