A1 at 300 DPI in pixels: 7016 × 9933

A1 at 300 DPI is 7016 × 9933 pixels

A1 (594 × 841 mm) at 300 DPI is 7016 × 9933 pixels, which is 70 megapixels.

Portrait	7016 × 9933 pixels
Landscape	9933 × 7016 pixels
With 3 mm bleed	7087 × 10004 pixels
Megapixels	70
Aspect ratio	1.42:1 (1 to √2 before rounding)
File size	199 MB as uncompressed 8-bit RGB; a JPEG or PNG is smaller
Paper size	594 × 841 mm (23.39 × 33.11 in)

Portrait

7016 × 9933 pixels

Landscape

9933 × 7016 pixels

With 3 mm bleed

7087 × 10004 pixels

Megapixels

Aspect ratio

1.42:1 (1 to √2 before rounding)

File size

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

Paper size

594 × 841 mm (23.39 × 33.11 in)

The working

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

Width: 594 mm ÷ 25.4 = 23.386 in; 23.386 in × 300 = 7,015.7, which rounds to 7016 pixels.
Height: 841 mm ÷ 25.4 = 33.11 in; 33.11 in × 300 = 9,933.1, which rounds to 9933 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 7087 × 10004 pixels.

Is your photo big enough?

To fill A1 at 300 DPI an image needs at least 7016 × 9933 pixels. Cropped to fill the sheet:

A 12 megapixel phone photo (4000 × 3000) gives 121 DPI: short of 300, so it would be upscaled or printed softer.
A 24 megapixel camera photo (6000 × 4000) gives 171 DPI: short of 300, so it would be upscaled or printed softer.
A 48 megapixel photo (8000 × 6000) gives 242 DPI: short of 300, so it would be upscaled or printed softer.

At 300 DPI the pixels of a print blend together from about 11.5 inches (29 cm) away. 300 DPI is the standard for print that is held in the hand: books, magazines, photo prints, business cards and flyers. At reading distance the eye can no longer pick out the pixels.

A1 at other resolutions

Resolution	Pixels	With bleed	Megapixels	Uncompressed
72 DPI	1684 × 2384	1701 × 2401	4	11 MB
96 DPI	2245 × 3179	2268 × 3201	7.1	20 MB
100 DPI	2339 × 3311	2362 × 3335	7.7	22 MB
150 DPI	3508 × 4967	3543 × 5002	17	50 MB
200 DPI	4677 × 6622	4724 × 6669	31	89 MB
240 DPI	5613 × 7946	5669 × 8003	45	128 MB
300 DPI	7016 × 9933	7087 × 10004	70	199 MB
400 DPI	9354 × 13244	9449 × 13339	124	354 MB
600 DPI	14031 × 19866	14173 × 20008	279	797 MB
1200 DPI	28063 × 39732	28346 × 40016	1,115	3.12 GB

A1 is half of A0, a common size for posters, plans and flip charts. See A1 in pixels at every resolution or everything at 300 DPI.

A1 at 300 DPI is 7016 × 9933 pixels

The working

Is your photo big enough?

A1 at other resolutions

Other sizes at 300 DPI