A2 vs A3
A2 is four A4 pages; A3 is two. A2 (420 × 594 mm) is double A3 (297 × 420). Same 1 : √2 shape, so A3 enlarges to A2 at 141% with nothing cropped.
Compare a Different Pair
A2 and A3, Side by Side
| A2 | A3 | Difference | |
|---|---|---|---|
| Millimetres | 420 × 594 | 297 × 420 | 123 × 174 mm |
| Inches | 16.54 × 23.39 | 11.69 × 16.54 | 4.84 × 6.85 in |
| Centimetres | 42.0 × 59.4 | 29.7 × 42.0 | |
| Area | 0.249 m², 249,480 mm² | 0.125 m², 124,740 mm² | 2× |
| Aspect ratio | 1 : 1.414 (√2) | 1 : 1.414 (√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 | A2 onto A3 | A3 onto A2 |
|---|---|---|---|
| Width | 61.5 mm (2.42 in) each side | A2 loses it | blank band |
| Height | 87 mm (3.43 in) each end | A2 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:
| A3 to fit A2 | 141% | fills the sheet, nothing cropped |
|---|---|---|
| A2 to fit A3 | 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.
Which Should You Use?
A3 for a sheet that still fits an office multifunction printer and a large snap frame. A2 for a poster meant to be read from across a room, printed at a shop on a wide-format machine.
Beyond the Measurements
Envelopes: A2 has no standard fitted envelope; A3 fits C3.
Worth Knowing
The jump from A3 to A2 is also the jump from "the office can print this" to "this goes to a print shop". A3 is the ceiling for almost any multifunction printer; A2 needs wide-format. So the practical question is often budget and turnaround as much as impact. If a design works at A3 in a snap frame by a doorway, keep it there. If it has to hold a room, or carry an image that needs the size, A2 is worth the trip, and it still folds to A4 for transport.
Frequently Asked Questions
Is A2 bigger than A3?
A2 is bigger. It is 420 × 594 mm against 297 × 420 mm for A3, about 2 times the area.
What is the difference between A2 and A3?
A2 is four A4 pages; A3 is two. A2 (420 × 594 mm) is double A3 (297 × 420). Same 1 : √2 shape, so A3 enlarges to A2 at 141% with nothing cropped.
Can you print A3 on A2?
Yes, cleanly. Set the printer to scale A3 to 141% and it fills A2 edge to edge with nothing lost.
✓ Dimensions per the standards on the A2 and A3 pages. Differences and scale factors computed. Reviewed . Editorial Process →