A5 vs A9
| A5 | A9 | |
|---|---|---|
| Millimetres | 148 × 210 | 37 × 52 |
| Inches | 5.83 × 8.27 | 1.46 × 2.05 |
| Centimetres | 14.8 × 21 | 3.7 × 5.2 |
| Aspect ratio | 1:1.42 | 1:1.41 |
| Area | 310.8 cm² | 19.2 cm² |
Which is bigger
A5 is 16 times the area of A9. They are 4 steps apart in the A series and each step halves the sheet, so the multiple is two to the power of 4. The number in the name going up while the sheet goes down is why this has to be asked rather than read off.
A5 is 111 mm wider than A9. A5 is 158 mm taller.
Printing one on the other
A A9 page fits inside A5 whole — print it at 100% and you get a 55.5 mm border down each side and 79 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| A5 artwork on A9 paper | 24.8% | 0.4 × 0 mm margin |
| A9 artwork on A5 paper | 400% | 0 × 2 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: A5 is 1:1.42 and A9 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 0.4 mm of unwanted margin.
Frequently asked questions
What is the difference between A5 and A9?
A5 is 148 × 210 mm and A9 is 37 × 52 mm. A5 is the larger of the two by 1515.4% in area.
Can I print A5 on A9?
Not at full size. Scale it to 24.8% and it fits inside A9 with 0.4 × 0 mm to spare.
Which is bigger, A5 or A9?
A5 — 148 × 210 mm against 37 × 52 mm, which is 1515.4% more area.
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A5 in full · A9 in full · All size comparisons · All paper sizes