A3
297 mm
420 mm
What Size Is A3 Paper?
A3, part of the A Series under the A Paper Sizes group, measures 297 x 420 mm, which is 29.7 x 42.0 cm or approximately 11.69 x 16.54 inches. It follows the ISO 216 specification and has an area of approximately 0.1247 m².
A3 Paper Size Dimensions & Conversions
Paper Series
A Series
Standard
ISO 216
Width
297 mm
Height
420 mm
Area
0.1247 m²
Aspect Ratio
1:1.414
Previous Size
A2
Next Size
A4
A3 Dimensions in Different Units
| Unit | Width | Height |
|---|---|---|
| Millimeters | 297 mm | 420 mm |
| Centimeters | 29.7 cm | 42.0 cm |
| Inches | 11.69 in | 16.54 in |
| Feet | 0.97 ft | 1.38 ft |
| Meters | 0.297 m | 0.42 m |
| Points | 842 pt | 1191 pt |
| Picas | 70.2 pc | 99.2 pc |
What Is A3 Paper Used For?
Printing
This size is widely used for everyday document printing, reports, and office correspondence.
Design and Layout
Designers and print professionals use A3 when a layout calls for this specific format.
Reproduction and Scaling
A3 can be scaled up or down to produce related sizes in the same series.
Presentations and Displays
A3 is suitable for boards, handouts, or displays sized to this format.
Archiving and Filing
Printed materials in A3 are stored and filed using standard folders sized for this format.
Digital Reference
A3 dimensions are used as a page-size preset in design and publishing software.
Related A Series Sizes
Frequently Asked Questions
What is A3 size in inches?
A3 measures approximately 11.69 x 16.54 inches.
What is A3 size in centimeters?
A3 measures 29.7 x 42.0 cm.
What is A3 size in millimeters?
A3 measures 297 x 420 mm.
What is A3 size in pixels?
At 300 DPI, A3 is approximately 3507 x 4962 pixels.
Is A3 bigger than A4?
Yes. A3 is larger in area than A4 in the A Paper Sizes series.