A4 Paper Size
A4 paper measures 210 × 297 mm (8.27 × 11.69 in).
| Millimetres | 210 × 297 mm |
|---|---|
| Centimetres | 21 × 29.7 cm |
| Inches | 8.27 × 11.69 in |
| Aspect ratio (long ÷ short) | 1.414 |
| Relation | Half of A3 (fold or cut it across the long side to get A4) |
| Next size down | A5 is half of A4 |
| Series neighbours | B4 is a little larger; C4 is the envelope that fits it |
| Area | 0.0624 m² |
| Resolution | Width × height | Typical use |
|---|---|---|
| 72 PPI | 595 × 842 px | Screen design (PDF points) |
| 96 PPI | 794 × 1123 px | Web / CSS pixels |
| 150 PPI | 1240 × 1754 px | Draft print quality |
| 300 PPI | 2480 × 3508 px | High-quality print |
| Paper weight | One sheet | 500 sheets (one ream) |
|---|---|---|
| 70 gsm | 4.37 g | 2.18 kg |
| 80 gsm | 4.99 g | 2.49 kg |
| 90 gsm | 5.61 g | 2.81 kg |
| 100 gsm | 6.24 g | 3.12 kg |
| 120 gsm | 7.48 g | 3.74 kg |
| 160 gsm | 9.98 g | 4.99 kg |
| Print onto | Scale |
|---|---|
| A5 paper | 70.5% |
| A3 paper | 141.4% |
| Letter paper | 94.1% |
| Legal paper | 102.8% |
| Size | Sheets | Dimensions |
|---|---|---|
| A5 | 2 | 148 × 210 mm |
| A6 | 4 | 105 × 148 mm |
| A7 | 8 | 74 × 105 mm |
| A8 | 16 | 52 × 74 mm |
Where you will see A4
A4 is the everyday office size in countries that use ISO paper. Letters, forms, reports, CVs and PDF documents are normally laid out for A4, and home and office printers there are set to A4 by default.
About A4
A4 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 0.0624 square metres.
A4 compared with US Letter
A4 is 210 × 297 mm. Letter is 215.9 × 279.4 mm (8.5 × 11 in). A4 is about 6 mm narrower and 18 mm taller. Scaling a document between them without checking margins can cut off text.
Frequently asked questions
What are the dimensions of A4 paper?
A4 paper is 210 × 297 mm (8.27 × 11.69 inches).
How many pixels is A4?
At 300 PPI, A4 is 2480 × 3508 pixels. At 72 PPI it is 595 × 842 pixels. The number depends on the resolution you choose; use the paper size converter for any PPI.
How much does a sheet of A4 paper weigh?
It depends on the paper weight. At 80 gsm a single A4 sheet weighs 4.99 g, and a ream of 500 sheets weighs 2.49 kg. See how paper weight works.
How many smaller sheets can I get from one A4?
Because each A size is half of the previous one, one A4 sheet gives you 2 × A5, 4 × A6, 8 × A7, 16 × A8.
Is A4 the same as Letter?
No. A4 is slightly narrower and longer than Letter. See A4 vs Letter for a side-by-side comparison.
Related
- A3 Paper Size297 × 420 mm
- A5 Paper Size148 × 210 mm
- B4 Paper Size250 × 353 mm
- C4 Envelope Size229 × 324 mm
- Letter Paper Size8.5 × 11 in
- A4 vs Letter: What Is the Difference?Side-by-side comparison
- How ISO Paper Sizes Work (A, B and C)Why A4 is 210 × 297 mm
Last updated: 2026-10-03