A0 vs A1
| A0 | A1 | |
|---|---|---|
| Millimetres | 841 × 1189 | 594 × 841 |
| Inches | 33.11 × 46.81 | 23.39 × 33.11 |
| Centimetres | 84.1 × 118.9 | 59.4 × 84.1 |
| Aspect ratio | 1:1.41 | 1:1.42 |
| Area | 9999.5 cm² | 4995.5 cm² |
Which is bigger
A0 and A1 are one step apart in the A series, so one is exactly twice the other. Two A1 sheets side by side make an A0, and folding an A0 in half across its long edge gives two A1. That is what the series is for, and it is why the scale factors below come out at 70.7% and 141.4% — one over the square root of two, and the square root of two.
A0 is 247 mm wider than A1. A0 is 348 mm taller.
Printing one on the other
A A1 page fits inside A0 whole — print it at 100% and you get a 123.5 mm border down each side and 174 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| A0 artwork on A1 paper | 70.6% | 0 × 1.2 mm margin |
| A1 artwork on A0 paper | 141.4% | 1.2 × 0 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: A0 is 1:1.41 and A1 is 1:1.42. 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 1.2 mm of unwanted margin.
Frequently asked questions
What is the difference between A0 and A1?
A0 is 841 × 1189 mm and A1 is 594 × 841 mm. A0 is the larger of the two by 100.2% in area.
Can I print A0 on A1?
Not at full size. Scale it to 70.6% and it fits inside A1 with 0 × 1.2 mm to spare.
Which is bigger, A0 or A1?
A0 — 841 × 1189 mm against 594 × 841 mm, which is 100.2% more area.
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A0 in full · A1 in full · All size comparisons · All paper sizes