8.5x11 Aspect Ratio Calculator
Calculate dimensions for 8.5x11 Letter format, the standard paper size for documents and printing.
Calculate dimensions for 8.5x11 Letter format, the standard paper size for documents and printing.
The 8.5x11 inch format, known as "US Letter" or simply "Letter," is the standard paper size in the United States, Canada, and parts of Mexico. It's used for nearly all business documents, resumes, flyers, and everyday printing. The aspect ratio is approximately 1:1.294, slightly different from the international A4 standard.
72 DPI (Web)
612 x 792
150 DPI (Standard)
1275 x 1650
300 DPI (Print)
2550 x 3300
US Letter
8.5 x 11 inches
215.9 x 279.4 mm
2550 x 3300 px (300 DPI)
ISO A4
8.27 x 11.69 inches
210 x 297 mm
2480 x 3508 px (300 DPI)
Letter is wider and shorter than A4. Content designed for one may need adjustment for the other.
| Resolution | DPI | Category | Megapixels |
|---|---|---|---|
| 612x792 | 72 DPI (Web) | Screen | 0.5 MP |
| 850x1100 | 100 DPI (Draft) | 0.9 MP | |
| 1275x1650 | 150 DPI (Standard) | 2.1 MP | |
| 1700x2200 | 200 DPI (Good) | 3.7 MP | |
| 2550x3300 | 300 DPI (Print Quality) | 8.4 MP | |
| 3400x4400 | 400 DPI (High Quality) | 15.0 MP | |
| 5100x6600 | 600 DPI (Professional) | 33.7 MP | |
| 1224x1584 | 144 DPI (Retina) | Screen | 1.9 MP |
Standard format for letters, reports, and professional correspondence
The expected format for job applications in North America
Marketing materials, church bulletins, and event information
Legal documents, applications, and official paperwork
No, they're different. Letter (8.5x11") is 215.9 x 279.4mm, while A4 is 210 x 297mm. A4 is narrower but taller. Letter is used in North America; A4 is the international standard used elsewhere.
8.5 x 300 = 2550 pixels wide, 11 x 300 = 3300 pixels tall. So 8.5x11 at 300 DPI is 2550x3300 pixels—the standard for print-ready documents.
Standard bleed is 0.125 inches (1/8") on each side. With bleed, your document should be 8.75x11.25 inches (2625x3375 pixels at 300 DPI).
The origins are debated, but it likely evolved from the hand papermaking process where standard molds produced sheets close to this size. It became standardized through usage before any official standards existed.
The exact ratio is 17:22 (when simplified from 8.5:11). As a decimal, it's approximately 1:1.294. This is notably different from A4's ratio of approximately 1:1.414 (√2).