A4 Paper Size
A4 paper size measures 210 × 297 mm. The Dimensions of A4 Paper are 8.27 by 11.69 inches, 21.0 by 29.7 centimetres, 2480 by 3508 pixels at 300 DPI, and 595 by 842 points. It is half of A3. Its most common use is office documents.
A4 measures 210 millimetres wide and 297 millimetres tall.
Dimensions of A4 Paper
| Unit | Width | Height | Width × height | Copy |
|---|---|---|---|---|
| Millimetres (mm) | 210 | 297 | 210 × 297 mm | |
| Centimetres (cm) | 21.0 | 29.7 | 21.0 × 29.7 cm | |
| Metres (m) | 0.21 | 0.297 | 0.21 × 0.297 m | |
| Inches (in) | 8.27 | 11.69 | 8.27 × 11.69 in | |
| Feet (ft) | 0.69 | 0.97 | 0.69 × 0.97 ft | |
| Points (pt) | 595 | 842 | 595 × 842 pt | |
| Picas (pc) | 49.6 | 70.2 | 49.6 × 70.2 pc | |
| Pixels at 72 DPI | 595 | 842 | 595 × 842 px | |
| Pixels at 150 DPI | 1240 | 1754 | 1240 × 1754 px | |
| Pixels at 300 DPI | 2480 | 3508 | 2480 × 3508 px | |
| Pixels at 600 DPI | 4961 | 7016 | 4961 × 7016 px |
Pixel counts follow from the resolution: pixels = millimetres ÷ 25.4 × DPI. More on the DPI and pixels page.
A4 Paper Format
A4 is half of A3 and folds in half to A5. One A4 sheet tiles into 2 × A5, 4 × A6, 8 × A7. Put A4 next to another size in the comparison tool.
A4 Size in Millimeters (mm)
A4 is 210 × 297 mm (210 mm wide, 297 mm tall). Millimetres are the base unit of ISO 216, so these are the exact figures paper mills and print shops cut to. Page-setup dialogs outside the US expect ISO A-series sizes entered in mm.
A4 Size in Centimeters (cm)
A4 is 21.0 × 29.7 cm. Centimetres are the handy unit for checking a sheet against a school ruler or giving a rough size; the figure is the millimetre value divided by ten.
A4 Size in Inches
A4 is 8.27 × 11.69 inches. Inches come up when A4 is opened in US-configured software or compared with Letter and Legal. One inch is fixed at 25.4 mm.
A4 Size in Pixels
At 300 DPI A4 is 2480 × 3508 px; at 72 DPI it is 595 × 842 px. Pixel dimensions are what you type into the new-document box in Photoshop, GIMP or Figma, and they scale with the DPI you choose.
A4 in Pixels at 72 DPI (Screen)
A4 is 595 × 842 px at 72 DPI. This is the legacy screen resolution, used for on-screen mockups, web previews and wireframes where physical print size is not the point.
A4 in Pixels at 300 DPI (Print)
A4 is 2480 × 3508 px at 300 DPI. 300 DPI is the print-quality benchmark, so set an A4 canvas to this pixel count for anything going to a commercial or a good home printer.
A4 Size in Points (pt)
A4 is 595 × 842 points. Points are the unit of PDF, InDesign and LaTeX page geometry, where 72 points make one inch. A page set to 595 by 842 pt exports as A4.
A4 Shape and Area
| Aspect ratio | 1 : 1.414 (√2) |
|---|---|
| Area | 0.0624 m² · 62,370 mm² |
| Diagonal | 363.7 mm · 14.32 in |
| ISO 216 tolerance | ± 2 mm each side |
| Closest US size | Letter |
| Governing standard | ISO 216:2007 |
Frequently Asked Questions
What is A4 Paper Size?
A piece of A4 paper measures 210 × 297 mm (8.27 × 11.69 in). It is one of the ISO 216 A-series sizes, made by folding A3 in half, and it folds again to make A5.
What are the Uses of A4 Paper?
A4 is used for office documents and letterhead, folded mail, stapled booklets and worksheets, forms and applications.
How long is a piece of A4 paper?
A4 is 297 mm long on the longer edge and 210 mm on the shorter edge, which is 29.7 cm by 21.0 cm.
How long is A4 paper in inches?
The long edge of A4 is 11.69 inches and the short edge is 8.27 inches.
How long is a piece of A4 paper in cm?
A4 is 29.7 cm long by 21.0 cm wide.
A Paper Sizes
✓ Dimensions per ISO 216:2007; unit values derived by formula. Reviewed . Editorial Process →