C1 vs C2
C1 is the larger of the two at the same 1 : √2 shape, one halving apart, so one scales onto the other with nothing cropped: 141% up, 71% down.
Compare a Different Pair
C1 and C2, Side by Side
| C1 | C2 | Difference | |
|---|---|---|---|
| Millimetres | 648 × 917 | 458 × 648 | 190 × 269 mm |
| Inches | 25.51 × 36.1 | 18.03 × 25.51 | 7.48 × 10.59 in |
| Centimetres | 64.8 × 91.7 | 45.8 × 64.8 | |
| Area | 0.594 m², 594,216 mm² | 0.297 m², 296,784 mm² | 2× |
| Aspect ratio | 1 : 1.415 (√2) | 1 : 1.415 (√2) | same |
What Is Lost Printing One on the Other
At 100% scale, both centred, nothing resized. A positive figure on the wider or taller side is cropped; on the other it is a blank margin.
| Axis | Gap | C1 onto C2 | C2 onto C1 |
|---|---|---|---|
| Width | 95 mm (3.74 in) each side | C1 loses it | blank band |
| Height | 134.5 mm (5.3 in) each end | C1 loses it | blank band |
Scale-to-Fit Percentages
The figure to type into a printer or PDF dialog to scale one to fit inside the other:
| C2 to fit C1 | 141% | fills the sheet, nothing cropped |
|---|---|---|
| C1 to fit C2 | 71% | fills the sheet, nothing cropped |
Both are one halving apart on the 1 : √2 series, so these are the copier presets and nothing is distorted or lost.
Frequently Asked Questions
Is C1 bigger than C2?
C1 is bigger. It is 648 × 917 mm against 458 × 648 mm for C2, about 2 times the area.
What is the difference between C1 and C2?
C1 is the larger of the two at the same 1 : √2 shape, one halving apart, so one scales onto the other with nothing cropped: 141% up, 71% down.
Can you print C2 on C1?
Yes, cleanly. Set the printer to scale C2 to 141% and it fills C1 edge to edge with nothing lost.
✓ Dimensions per the standards on the C1 and C2 pages. Differences and scale factors computed. Reviewed . Editorial Process →