Instant & Free Paper Size Calculator
A4 to US Letter Size Converter
Compare and convert A4 to US Letter dimensions.
A4
Letter
Calculation: 1 A4 = 1 Letter
Formula: A4: 210 × 297 mm (8.27 × 11.69 in) vs Letter: 215.9 × 279.4 mm (8.5 × 11.0 in)
About A4 Paper (ISO) to US Letter Paper Conversion
The single most common international printing problem. Printing an A4 PDF onto US Letter paper (or vice versa) without "Fit to Printable Area" will clip document margins.
How to calculate manually:
A4 is taller and narrower (210 × 297 mm), while US Letter is wider and shorter (215.9 × 279.4 mm).
A4 Paper (ISO) to US Letter Paper Conversion Table
| A4 Paper (ISO) (A4) | US Letter Paper (Letter) | Action |
|---|---|---|
| 1 A4 | 1 Letter | |
| 2 A4 | 2 Letter | |
| 5 A4 | 5 Letter | |
| 10 A4 | 10 Letter | |
| 20 A4 | 20 Letter | |
| 50 A4 | 50 Letter | |
| 100 A4 | 100 Letter | |
| 500 A4 | 500 Letter |
Frequently Asked Questions (A4 Paper (ISO) to US Letter Paper)
Is A4 bigger than US Letter?
A4 is taller than US Letter by 17.6 mm (0.69 in), but US Letter is wider by 5.9 mm (0.23 in).
What are A4 dimensions in inches?
A4 measures exactly 8.27 × 11.69 inches (210 × 297 mm).
What are US Letter dimensions in mm?
US Letter measures 215.9 × 279.4 mm (8.5 × 11.0 inches).