A1 vs B1
| A1 | B1 | |
|---|---|---|
| Millimetres | 594 × 841 | 707 × 1000 |
| Inches | 23.39 × 33.11 | 27.83 × 39.37 |
| Centimetres | 59.4 × 84.1 | 70.7 × 100 |
| Aspect ratio | 1:1.42 | 1:1.41 |
| Area | 4995.5 cm² | 7070 cm² |
Which is bigger
B1, by 41.5% in area. B1 is 113 mm wider than A1. B1 is 159 mm taller.
Printing one on the other
A A1 page fits inside B1 whole — print it at 100% and you get a 56.5 mm border down each side and 79.5 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| A1 artwork on B1 paper | 118.9% | 0.7 × 0 mm margin |
| B1 artwork on A1 paper | 84% | 0 × 0.8 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: A1 is 1:1.42 and B1 is 1:1.41. 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 0.7 mm of unwanted margin.
Frequently asked questions
What is the difference between A1 and B1?
A1 is 594 × 841 mm and B1 is 707 × 1000 mm. B1 is the larger of the two by 41.5% in area.
Can I print A1 on B1?
Yes, at 100% — A1 is smaller on both edges, so it lands inside B1 with a border all round.
Which is bigger, A1 or B1?
B1 — 707 × 1000 mm against 594 × 841 mm, which is 41.5% more area.
A1 in full · B1 in full · All size comparisons · All paper sizes