ANSI B vs A3
Dimensions, area and a same-scale visual comparison.
ANSI B vs A3
ANSI B
279.4 × 431.8 mm
A3
297 × 420 mm
Width difference: 17.6 mm
Height difference: 11.8 mm
Area difference: 40.95 cm²
Relative area: 96.7% (ANSI B as a share of A3)
| Attribute | ANSI B | A3 |
|---|---|---|
| Dimensions (mm) | 279.4 × 431.8 | 297 × 420 |
| Dimensions (in) | 11 × 17 | 11.69 × 16.54 |
| Area | 1,206.45 cm² | 1,247.4 cm² |
| Aspect ratio | 1 : 1.545 | 1 : 1.414 |
| Standard / region | ANSI/ASME Y14.1 / North America | ISO 216 / International |