US Letter Paper Size: 8.5 × 11 Inches Explained
US Letter is 215.9 × 279.4 mm. Check both the PDF and the loaded sheet before printing; choosing a paper name in software does not change the sheet in the tray.
| Unit | Portrait dimensions |
|---|---|
| Inches | 8.5 × 11 |
| Millimetres | 215.9 × 279.4 |
| PDF points | 612 × 792 |
Work out the printable layout
A letterhead with a 0.5 inch inset on each side has a 7.5 × 10 inch content box: 190.5 × 254 mm. A 7.75 inch-wide table is too wide for that box. Redesigning the table keeps type and dimensions intact; Fit would shrink the whole page.
Avoid a paper-size mismatch
Letter is 8.5 × 11 inches. A4 is 210 × 297 mm, so Letter is wider but shorter. A full-sheet Letter page fits on A4 at about 97.27% before margins. The width is the limiting dimension. A printer’s printable area may require a smaller scale.
A controlled print setup
- Inspect the PDF page dimensions, including pages that may have a different size within the same file.
- Confirm that your printer and selected tray support the sheet. Load it using the tray guides.
- For forms and measured printables, select Actual Size and disable any second driver scaling control. Content outside the printable area can still be clipped.
- Make one test copy. Check the top and bottom, then measure a known line before committing to a batch.
When the printer lacks this size
Use a supported sheet and deliberately redesign or scale the layout. Do not describe a scaled copy as actual size. If a document must retain dimensions, consider tiling or a printing service that supports the original sheet.
Sources and method
- NIST: SI units of length: the exact conversion of one inch to 25.4 millimetres. Inch and point values below are calculated from the stated nominal dimensions.
- Adobe Acrobat: adjust page size for printing: Actual Size, Fit and the difference between the page and the printable area.