A0 vs A3
| A0 | A3 | |
|---|---|---|
| Millimetres | 841 × 1189 | 297 × 420 |
| Inches | 33.11 × 46.81 | 11.69 × 16.54 |
| Centimetres | 84.1 × 118.9 | 29.7 × 42 |
| Aspect ratio | 1:1.41 | 1:1.41 |
| Area | 9999.5 cm² | 1247.4 cm² |
Which is bigger
A0 is 8 times the area of A3. They are 3 steps apart in the A series and each step halves the sheet, so the multiple is two to the power of 3. The number in the name going up while the sheet goes down is why this has to be asked rather than read off.
A0 is 544 mm wider than A3. A0 is 769 mm taller.
Printing one on the other
A A3 page fits inside A0 whole — print it at 100% and you get a 272 mm border down each side and 384.5 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| A0 artwork on A3 paper | 35.3% | 0 × 0.1 mm margin |
| A3 artwork on A0 paper | 283.1% | 0.2 × 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
Both sheets have the same 1:1.41 proportions, so artwork scales between them without any cropping or extra margin — only the size changes.
Frequently asked questions
What is the difference between A0 and A3?
A0 is 841 × 1189 mm and A3 is 297 × 420 mm. A0 is the larger of the two by 701.6% in area.
Can I print A0 on A3?
Not at full size. Scale it to 35.3% and it fits inside A3 with 0 × 0.1 mm to spare.
Which is bigger, A0 or A3?
A0 — 841 × 1189 mm against 297 × 420 mm, which is 701.6% more area.
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A0 in full · A3 in full · All size comparisons · All paper sizes