A4 vs A3 – Size Comparison & Conversion
Compare A4 (210 × 297 mm) vs A3 (297 × 420 mm). Dimensions, aspect ratio, and printing tips.
A4
210 × 297 mm
8.27 × 11.69 in
A3
297 × 420 mm
11.69 × 16.54 in
Area
100%
A3 Ratio
Aspect ratio
1:1.414
A3 1:1.414
A4 vs A3 — Side by Side
| A4 | A3 |
|---|---|
| 210 mm | 297 mm |
| 297 mm | 420 mm |
| 8.27 in | 11.69 in |
| 11.69 in | 16.54 in |
| 62,370 mm² | 124,740 mm² |
| 1 : 1.414 | 1 : 1.414 |
| 2,480 × 3,508 px | 3,508 × 4,961 px |
Summary
A3 — 100% A4 (Area)