2026 guide
What is 8.5 x 11 in pixels?
Short answer: at 300 DPI, 8.5×11 inches = 2550 × 3300 pixels. At 150 DPI it's 1275 × 1650; at 72 DPI, 612 × 792 — the size of a US Letter PDF page. The number depends on DPI (dots per inch), because pixels are resolution-dependent while inches are physical. Multiply each side by the DPI you need: 8.5 × DPI wide, 11 × DPI tall.
The conversion matrix
| DPI | Pixels (width × height) | Total megapixels | Use for |
|---|---|---|---|
| 72 | 612 × 792 | 0.48 MP | Legacy Mac screen reference; old PDFs |
| 96 | 816 × 1056 | 0.86 MP | Screen mockups, Windows reference |
| 120 | 1020 × 1320 | 1.3 MP | Entry-level inkjet draft prints |
| 150 | 1275 × 1650 | 2.1 MP | Screen-only documents, draft prints |
| 200 | 1700 × 2200 | 3.7 MP | Office laser printers, posters |
| 300 | 2550 × 3300 | 8.4 MP | Standard print — the default answer |
| 450 | 3825 × 4950 | 18.9 MP | Large-format, close-viewing posters |
| 600 | 5100 × 6600 | 33.7 MP | Fine-art prints, heavy enlargement |
The formula (it never changes)
There is no single pixel size for a sheet of paper — pixels are resolution-dependent, inches are not. The conversion is one multiplication: width px = 8.5 × DPI, height px = 11 × DPI. Every answer anyone gives you is that formula with a different DPI plugged in. The rest of this guide is just choosing the right DPI for your situation.
Why 300 DPI is the default for print
300 DPI is the long-standing commercial print standard: at normal reading distance, dots smaller than about 1/300 inch merge into continuous tone. Newspapers historically ran 85–150 LPI screens, glossy magazines and photo printers target 300 DPI, and fine-art prints go to 600. Below ~150 DPI, individual dots become visible on text edges; above 300, files grow 4× (600 DPI = 5100×6600 = 33.7 megapixels) with returns most viewers can't see.
Screen vs print: when 72/96 DPI is correct
For anything that stays on a screen — a slide, a web mockup, a scanned page you'll read on a monitor — 96 DPI is the practical number (Windows CSS reference) and 72 DPI the historical Mac reference. At 96 DPI, 8.5×11 is just 816×1056. A PDF exported "for screen" at 150 DPI (1275×1650) is the comfortable middle: sharp on any display, half the size of a 300 DPI file.
Common mistakes
- Designing at screen DPI and printing: an 816×1056 image prints blurry at full page — always design at the printer's DPI, usually 300
- Confusing scanner settings with print DPI: scanning a document at 300 DPI captures 2550×3300; printing that same file at 300 DPI restores exactly the original size
- Upsampling a low-res scan: going 816×1056 → 2550×3300 in an editor interpolates; it cannot recover detail that was never captured. Re-scan at 300+ DPI instead
FAQ
Is 8.5×11 the same as A4?
No — they're close but different. Letter (US) is 8.5×11in = 215.9×279.4mm; A4 (everywhere else) is 210×297mm. A4 is taller and narrower. Converting between them always crops or pads; nothing resizes cleanly.
What resolution should I scan a document at?
300 DPI for anything you might print later (2550×3300, ~1.5MB/page as JPEG). 150 DPI is fine for archive-only reading. 600 DPI is for photos or small text you'll enlarge.
How big is a 300 DPI 8.5×11 file?
As PNG roughly 3–8MB depending on content (flat text compresses well, photos don't). As JPEG at quality 80, about 0.5–1.5MB. As an uncompressed TIFF, 24.2MB at 24-bit RGB.
Does my printer really print 300 DPI?
Most home inkjets have 4800×1200 hardware DPI but accept 300 DPI source files happily — the driver interpolates. Feeding 300 DPI source is the sweet spot; higher source DPI mostly enlarges spool files.
Last updated: · Launch guide: DPI conversion matrix, print-vs-screen rules · change history