ARCH E1 in pixels
9000 × 12600 px
at 300 DPI, the print standard · ARCH E1 is 762 × 1066.8 mm · 113.4 megapixels
ARCH E1 at every resolution
A sheet of paper has no pixel size of its own. It has a physical size — 762 × 1066.8 mm, or 30 × 42 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 | 2160 × 3024 | 6.5 MP | 19 MB | Screen only — visibly soft in print |
| 96 DPI | 2880 × 4032 | 11.6 MP | 33 MB | Screen only — visibly soft in print |
| 150 DPI | 4500 × 6300 | 28.4 MP | 81 MB | Drafts, internal documents, large-format viewed from a distance |
| 200 DPI | 6000 × 8400 | 50.4 MP | 144 MB | Acceptable for office printing |
| 300 DPI | 9000 × 12600 | 113.4 MP | 324 MB | The commercial print standard |
| 400 DPI | 12000 × 16800 | 201.6 MP | 577 MB | Fine detail and small type |
| 600 DPI | 18000 × 25200 | 453.6 MP | 1.27 GB | Line art, technical drawings, archival scanning |
| 1200 DPI | 36000 × 50400 | 1814.4 MP | 5.07 GB | Archival and reproduction work |
What the file size means for ARCH E1
At 300 DPI an uncompressed ARCH E1 is 324 MB, and at 600 DPI it is 1.27 GB — 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 324 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: 9000 px
Height: 12600 px
Resolution: 300 pixels/inch
Colour: CMYK for print, RGB for screen
Bleed: 3 mm on every edge → 9071 × 12671 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 E1 in pixels?
There is no single answer — it depends on the resolution. At the print standard of 300 DPI, ARCH E1 is 9000 × 12600 pixels. On screen at 72 DPI it is only 2160 × 3024.
What resolution should an ARCH E1 document be?
300 DPI for anything going to a commercial printer, which makes the canvas 9000 × 12600 pixels. 150 DPI (4500 × 6300) 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 243 MB of file.
How big is an ARCH E1 file at 300 DPI?
About 324 MB uncompressed at 24-bit colour — 9000 × 12600 × 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 E1 PDF is usually tens of megabytes.
How many megapixels is ARCH E1 at 300 DPI?
113.4 megapixels. For comparison, ARCH E1 at 600 DPI is 453.6 MP — quadruple, because doubling the resolution doubles both dimensions.
ARCH E1 in millimetres, inches and points · All paper sizes · Screen resolutions