A1 Paper Size
A1 paper measures 594 × 841 mm (23.39 × 33.11 in).
| Millimetres | 594 × 841 mm |
|---|---|
| Centimetres | 59.4 × 84.1 cm |
| Inches | 23.39 × 33.11 in |
| Aspect ratio (long ÷ short) | 1.416 |
| Relation | Half of A0 (fold or cut it across the long side to get A1) |
| Next size down | A2 is half of A1 |
| Series neighbours | B1 is a little larger; C1 is the envelope that fits it |
| Area | 0.4996 m² |
| Resolution | Width × height | Typical use |
|---|---|---|
| 72 PPI | 1684 × 2384 px | Screen design (PDF points) |
| 96 PPI | 2245 × 3179 px | Web / CSS pixels |
| 150 PPI | 3508 × 4967 px | Draft print quality |
| 300 PPI | 7016 × 9933 px | High-quality print |
| Paper weight | One sheet | 500 sheets (one ream) |
|---|---|---|
| 70 gsm | 34.97 g | 17.48 kg |
| 80 gsm | 39.96 g | 19.98 kg |
| 90 gsm | 44.96 g | 22.48 kg |
| 100 gsm | 49.96 g | 24.98 kg |
| 120 gsm | 59.95 g | 29.97 kg |
| 160 gsm | 79.93 g | 39.96 kg |
| Print onto | Scale |
|---|---|
| A5 paper | 24.9% |
| A4 paper | 35.3% |
| A3 paper | 49.9% |
| Letter paper | 33.2% |
| Legal paper | 36.3% |
| Size | Sheets | Dimensions |
|---|---|---|
| A2 | 2 | 420 × 594 mm |
| A3 | 4 | 297 × 420 mm |
| A4 | 8 | 210 × 297 mm |
| A5 | 16 | 148 × 210 mm |
Where you will see A1
A1 is a common poster and flip-chart size. Technical drawings, large maps and presentation posters are often printed at A1, and many flip-chart pads use sheets of roughly this size.
About A1
A1 belongs to the ISO 216 A series. Every A size has the same proportions (1 : √2, about 1.414), so folding or cutting a sheet across its long side gives the next size down with the same shape. Its area is 0.4996 square metres.
Frequently asked questions
What are the dimensions of A1 paper?
A1 paper is 594 × 841 mm (23.39 × 33.11 inches).
How many pixels is A1?
At 300 PPI, A1 is 7016 × 9933 pixels. At 72 PPI it is 1684 × 2384 pixels. The number depends on the resolution you choose; use the paper size converter for any PPI.
How much does a sheet of A1 paper weigh?
It depends on the paper weight. At 80 gsm a single A1 sheet weighs 39.96 g, and a ream of 500 sheets weighs 19.98 kg. See how paper weight works.
How many smaller sheets can I get from one A1?
Because each A size is half of the previous one, one A1 sheet gives you 2 × A2, 4 × A3, 8 × A4, 16 × A5.
Related
- A0 Paper Size841 × 1189 mm
- A2 Paper Size420 × 594 mm
- B1 Paper Size707 × 1000 mm
- C1 Envelope Size648 × 917 mm
Last updated: 2026-10-03