Compare Paper Sizes
Select two formats and see them at the same scale.
A4 vs Letter
A4
210 × 297 mm
Letter
215.9 × 279.4 mm
Width difference: 5.9 mm
Height difference: 17.6 mm
Area difference: 20.48 cm²
Relative area: 103.4% (A4 as a share of Letter)
| Attribute | A4 | Letter |
|---|---|---|
| Dimensions (mm) | 210 × 297 | 215.9 × 279.4 |
| Dimensions (in) | 8.27 × 11.69 | 8.5 × 11 |
| Area | 623.7 cm² | 603.22 cm² |
| Aspect ratio | 1 : 1.414 | 1 : 1.294 |
| Standard / region | ISO 216 / International | North American customary / North America |