A4 vs C4
| A4 | C4 | |
|---|---|---|
| Millimetres | 210 × 297 | 229 × 324 |
| Inches | 8.27 × 11.69 | 9.02 × 12.76 |
| Centimetres | 21 × 29.7 | 22.9 × 32.4 |
| Aspect ratio | 1:1.41 | 1:1.41 |
| Area | 623.7 cm² | 742 cm² |
Which is bigger
C4, by 19% in area. C4 is 19 mm wider than A4. C4 is 27 mm taller.
Printing one on the other
A A4 page fits inside C4 whole — print it at 100% and you get a 9.5 mm border down each side and 13.5 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| A4 artwork on C4 paper | 109% | 0 × 0.1 mm margin |
| C4 artwork on A4 paper | 91.7% | 0.1 × 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 A4 and C4?
A4 is 210 × 297 mm and C4 is 229 × 324 mm. C4 is the larger of the two by 19% in area.
Can I print A4 on C4?
Yes, at 100% — A4 is smaller on both edges, so it lands inside C4 with a border all round.
Which is bigger, A4 or C4?
C4 — 229 × 324 mm against 210 × 297 mm, which is 19% more area.
A4 in full · C4 in full · All size comparisons · All paper sizes