Paper size guide

A3 size: pixels, inches and millimetres

A3 measures 297 × 420 mm, or 11.69 × 16.54 inches.

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Physical size297 × 420 mm · 11.69 × 16.54 in

Aspect ratio1 : 1.414

300 PPI3508 × 4961 px

A3 is a common choice for posters, presentations, menus and enlarged documents.

Use the pixel table to prepare files at the resolution required by your printer.

Pixel dimensions at common PPI settings

PPI	Required pixels
72	842 × 1191 px
96	1123 × 1587 px
150	1754 × 2480 px
300	3508 × 4961 px
600	7016 × 9921 px

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Check your image for this size.

The calculator is pre-set to this print size.

Print resultLIVE

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Check multiple imagesUp to 10 images; dimensions are read locally in your browser.

Image width pxImage height px

Print target

Target quality

Bleed mmImage fit

≈

Usable, but may look soft up close

Effective resolution: 244 PPI · A3

Print preflight

Includes bleed

Resolution: Printable, but inspect the detail up close
Framing: Crop required

Pixels still needed to meet the target: 756 × 1008 px

Maximum recommended print size

256 × 341 mm · 10.1 × 13.4 in

Pixels required for this target

3508 × 4961 px

Aspect ratio and crop

Left and right edges will be cropped · 5.71%

Production setup

303 × 426 mm · 3579 × 5031 px

Common size comparison

Size	PPI	Status
A5	488	Meets target
A4	345	Meets target
A3	244	Usable
US Letter	356	Meets target
4 × 6 in	672	Meets target
5 × 7 in	576	Meets target
8 × 10 in	378	Meets target

● All calculations stay in your browser

Frequently asked questions

How many pixels is A3 at 300 PPI?

3508 × 4961 pixels.

Is A3 twice the size of A4?

A3 has twice the area of A4, while keeping the same proportions.

Can I enlarge A4 artwork to A3?

Only if the image has enough pixels for the larger final dimensions.