US Letter measures 215.9 × 279.4 mm. Its pixel dimensions change with PPI; the physical trim size does not.
US Letter measures exactly 8.5 × 11 inches, or 215.9 × 279.4 mm (21.59 × 27.94 cm). At 300 PPI, portrait Letter is exactly 2550 × 3300 pixels.
300 PPI: 2550 × 3300 px · 8.5 × 11 in trimPortrait values are rounded to the nearest whole pixel after converting the native physical dimensions.
| PPI | Width | Height | Use context |
|---|---|---|---|
| 72 | 612 px | 792 px | Layout or screen reference |
| 96 | 816 px | 1056 px | Layout or screen reference |
| 150 | 1275 px | 1650 px | Print / distance dependent |
| 240 | 2040 px | 2640 px | Print / distance dependent |
| 300 | 2550 px | 3300 px | Detailed print target |
| 600 | 5100 px | 6600 px | Detailed print target |
US Letter is 5.9 mm wider and 17.6 mm shorter than A4 in portrait orientation. Full-page A4 artwork should be checked before printing on Letter.
Compare A4 →Letter is 1275 × 1650 px at 150 PPI, 2040 × 2640 px at 240 PPI and 2550 × 3300 px at 300 PPI.
Change the PPI →Adding 0.125 inch on every edge creates an 8.75 × 11.25 inch canvas, or 2625 × 3375 pixels at 300 PPI.
Calculate printer margins →Letter identifies the final physical format. Bleed expands the artwork beyond that edge; a safe margin moves important content inward. Those extra values depend on the print provider.
Calculate bleed and safe area →Run the source pixels against the exact size you plan to order.