ARCH B vs Super A3
| ARCH B | Super A3 | |
|---|---|---|
| Millimetres | 304.8 × 457.2 | 329 × 483 |
| Inches | 12 × 18 | 12.95 × 19.02 |
| Centimetres | 30.5 × 45.7 | 32.9 × 48.3 |
| Aspect ratio | 1:1.5 | 1:1.47 |
| Area | 1393.5 cm² | 1589.1 cm² |
Which is bigger
Super A3, by 14% in area. Super A3 is 24.2 mm wider than ARCH B. Super A3 is 25.8 mm taller.
Printing one on the other
A ARCH B page fits inside Super A3 whole — print it at 100% and you get a 12.1 mm border down each side and 12.9 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| ARCH B artwork on Super A3 paper | 105.6% | 7 × 0 mm margin |
| Super A3 artwork on ARCH B paper | 92.6% | 0 × 9.7 mm margin |
These are the numbers for the "custom scale" box in a print dialog. "Fit to page" computes the same thing, but knowing the figure tells you in advance whether the result will look deliberate or accidental.
Why the shapes matter
The proportions differ: ARCH B is 1:1.5 and Super A3 is 1:1.47. That difference is why a layout moved between them never quite lines up — scale it to fit one edge and the other is left with 7 mm of unwanted margin.
Frequently asked questions
What is the difference between ARCH B and Super A3?
ARCH B is 304.8 × 457.2 mm and Super A3 is 329 × 483 mm. Super A3 is the larger of the two by 14% in area.
Can I print ARCH B on Super A3?
Yes, at 100% — ARCH B is smaller on both edges, so it lands inside Super A3 with a border all round.
Which is bigger, ARCH B or Super A3?
Super A3 — 329 × 483 mm against 304.8 × 457.2 mm, which is 14% more area.
ARCH B in full · Super A3 in full · All size comparisons · All paper sizes