How many pixels is 300 DPI?

Multiply the print size in inches by 300. A 12 inch wide print needs 3600 pixels; A4 needs 2480 by 3508.

How do I convert pixels to centimetres?

Divide the pixel count by the print density, then multiply by 2.54. 4000 pixels at 300 DPI give 33.9 centimetres, or 13.3 inches.

How large can a 1024 pixel image be printed?

8.7 centimetres, about 3.4 inches, at 300 DPI. Anything larger needs a neural upscale or a lower density.

Calculator · Resolution

Pixels,
centimetres,
300 DPI.

Two questions, one calculation. How large your image can print, and how many pixels the size you want demands. Everything is worked out here, nothing is sent anywhere.

Width in pixels

Height in pixels

Print density (DPI)

The maths: pixels = inches × DPI. One inch is 2.54 cm.

Printable size

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What your image allows, format by format

The density shown is the one actually reached once the image is cropped to the format's aspect ratio. The short side decides.

Format	Family	Size	Density reached	Verdict

Reference tables

Print size to pixels, at 300 DPI

Size	300 DPI	200 DPI	150 DPI
4 × 6 in	1200 × 1800	800 × 1200	600 × 900
5 × 7 in	1500 × 2100	1000 × 1400	750 × 1050
8 × 10 in	2400 × 3000	1600 × 2000	1200 × 1500
A4 — 8.3 × 11.7 in	2480 × 3508	1654 × 2339	1240 × 1754
11 × 14 in	3300 × 4200	2200 × 2800	1650 × 2100
A3 — 11.7 × 16.5 in	3508 × 4961	2339 × 3307	1754 × 2480
16 × 20 in	4800 × 6000	3200 × 4000	2400 × 3000
A2 — 16.5 × 23.4 in	4961 × 7016	3307 × 4677	2480 × 3508
24 × 36 in	7200 × 10800	4800 × 7200	3600 × 5400
A1 — 23.4 × 33.1 in	7016 × 9933	4677 × 6622	3508 × 4967

Pixels to print size, at 300 DPI

Pixels	At 300 DPI	At 150 DPI	What it is
1024	3.4 in / 8.7 cm	6.8 in	native AI render
1920	6.4 in / 16.3 cm	12.8 in	screenshot
2480	8.3 in / 21.0 cm	16.5 in	A4 exactly
4000	13.3 in / 33.9 cm	26.7 in	24 MP camera, short side
6000	20.0 in / 50.8 cm	40.0 in	24 MP camera, long side
8192	27.3 in / 69.3 cm	54.6 in	render upscaled ×4

Three things this calculator cannot see

The DPI written in the file does not count

An image can be labelled 72 DPI and print a 24 inch poster perfectly. Only the pixel count decides, and the label is fixed on export in one second. Details here.

Pixels are not detail

A file enlarged by plain interpolation shows the right pixel count and stays soft. The calculator says yes, the eye says no.

Aspect ratio is paid for at the crop

Square into 3:4 sacrifices a quarter of the image. The density column above accounts for it; the raw formula does not.

Short on pixels?

The workshop upscales inside your browser and writes a 300 DPI file in a size print shops sell. Its interface is in French for now.

Open the workshop

Other calculators: check a file, unit converter, print size by megapixels.

Pixels,centimetres,300 DPI.