US Letter size
US Letter is 8.5 × 11 inches — 215.9 × 279.4 mm, or 21.6 × 27.9 cm. It's the standard paper size in the US, Canada and a few other countries, where most of the world uses A4 instead.
8.5 × 11 ininches
215.9 × 279.4 mmmillimetres
21.6 × 27.9 cmcentimetres
US Letter in every unit
| Unit | Width | Height |
|---|---|---|
| Inches | 8.5 in | 11 in |
| Millimetres | 215.9 mm | 279.4 mm |
| Centimetres | 21.6 cm | 27.9 cm |
| Points (72/in) | 612 pt | 792 pt |
Pixel dimensions at common DPI
| DPI | Pixels |
|---|---|
| 72 (web) | 612 × 792 px |
| 96 (Windows default) | 816 × 1056 px |
| 150 (draft print) | 1275 × 1650 px |
| 300 (standard print) | 2550 × 3300 px |
| 600 (fine detail) | 5100 × 6600 px |
US Letter vs A4
| Format | Size | Notes |
|---|---|---|
| US Letter | 8.5 × 11 in (216 × 279 mm) | US, Canada, Philippines, parts of Latin America |
| A4 | 8.27 × 11.69 in (210 × 297 mm) | Rest of the world (ISO 216) |
Letter is defined in inches, so its millimetre value (215.9 × 279.4) never lands on a round number — the reverse of A4, which is defined in millimetres and gives untidy inch values (8.27 × 11.69). The practical difference: Letter is about 6 mm wider but 18 mm shorter than A4. Printing a Letter document on an A4 printer (or vice versa) without rescaling crops roughly that amount off one edge — most print dialogs offer a "fit to page" option that handles it automatically, at the cost of a very slightly smaller margin.
Frequently asked questions
What is US Letter size in inches?
8.5 × 11 inches.
What is US Letter size in mm?
215.9 × 279.4 mm.
Is US Letter bigger than A4?
It's wider but shorter: Letter is 215.9 × 279.4 mm, A4 is 210 × 297 mm — Letter has about 3% more area.
How many pixels is US Letter at 300 DPI?
2550 × 3300 pixels.