A0 at 72 DPI in pixels: 2384 × 3370

A0 at 72 DPI is 2384 × 3370 pixels

A0 (841 × 1189 mm) at 72 DPI is 2384 × 3370 pixels, which is 8 megapixels.

Portrait	2384 × 3370 pixels
Landscape	3370 × 2384 pixels
With 3 mm bleed	2401 × 3387 pixels
Megapixels	8
Aspect ratio	1.41:1 (1 to √2 before rounding)
File size	23 MB as uncompressed 8-bit RGB; a JPEG or PNG is smaller
Paper size	841 × 1189 mm (33.11 × 46.81 in)

Portrait

2384 × 3370 pixels

Landscape

3370 × 2384 pixels

With 3 mm bleed

2401 × 3387 pixels

Megapixels

Aspect ratio

1.41:1 (1 to √2 before rounding)

File size

23 MB as uncompressed 8-bit RGB; a JPEG or PNG is smaller

Paper size

841 × 1189 mm (33.11 × 46.81 in)

The working

Pixels are inches multiplied by the resolution, and an inch is 25.4 mm.

Width: 841 mm ÷ 25.4 = 33.11 in; 33.11 in × 72 = 2,383.9, which rounds to 2384 pixels.
Height: 1189 mm ÷ 25.4 = 46.811 in; 46.811 in × 72 = 3,370.4, which rounds to 3370 pixels.

Bleed is extra image past the trim line, so that a cut that lands slightly off still leaves ink to the edge. Print shops usually ask for 3 mm on every side of an A-series page, which makes the file 2401 × 3387 pixels.

Is your photo big enough?

To fill A0 at 72 DPI an image needs at least 2384 × 3370 pixels. Cropped to fill the sheet:

A 12 megapixel phone photo (4000 × 3000) gives 85 DPI: enough.
A 24 megapixel camera photo (6000 × 4000) gives 121 DPI: enough.
A 48 megapixel photo (8000 × 6000) gives 171 DPI: enough.

At 72 DPI the pixels of a print blend together from about 47.7 inches (121 cm) away. 72 DPI is the old screen convention: early Macintosh displays showed 72 pixels to the inch, matching the 72 points in an inch of type. Many image files still carry a 72 DPI tag for that reason.

A0 at other resolutions

Resolution	Pixels	With bleed	Megapixels	Uncompressed
72 DPI	2384 × 3370	2401 × 3387	8	23 MB
96 DPI	3179 × 4494	3201 × 4517	14	41 MB
100 DPI	3311 × 4681	3335 × 4705	15	44 MB
150 DPI	4967 × 7022	5002 × 7057	35	100 MB
200 DPI	6622 × 9362	6669 × 9409	62	177 MB
240 DPI	7946 × 11235	8003 × 11291	89	255 MB
300 DPI	9933 × 14043	10004 × 14114	139	399 MB
400 DPI	13244 × 18724	13339 × 18819	248	709 MB
600 DPI	19866 × 28087	20008 × 28228	558	1.56 GB
1200 DPI	39732 × 56173	40016 × 56457	2,232	6.24 GB

A0 is one square metre of paper, used for technical drawings and large posters. See A0 in pixels at every resolution or everything at 72 DPI.

A0 at 72 DPI is 2384 × 3370 pixels

The working

Is your photo big enough?

A0 at other resolutions

Other sizes at 72 DPI