Skip to the tool

HomeShrink & resize

Pixel, cm and inch converter

Convert between pixels, centimeters and inches at any DPI.

Runs in your browserNo sign-upNo watermark

Quick answer

To convert pixels to centimeters or inches, type the length, choose its unit and the DPI. At 300 DPI, 1 cm is about 118 pixels, and A4 paper is 2480 x 3508 pixels.

Read the guide: How to convert pixels to centimeters and inches

Convert a length

Pixels per inch. 72 or 96 for screens, 300 for print photos, 600 for fine print.

Pixels (px)
1920
Centimetres (cm)
16.26
Millimetres (mm)
162.56
Inches (in)
6.4

Common sizes at 300 DPI

SizePixels
A42480 x 3508 px
A51748 x 2480 px
A33508 x 4961 px
US Letter2550 x 3300 px
Passport photo (35 x 45 mm)413 x 531 px
Photo print 4 x 6 in1200 x 1800 px

How to convert pixels to cm or inches

  1. Type the length you have and choose its unit: pixels, centimeters, millimeters or inches.
  2. Choose the resolution in DPI (dots per inch). Use 300 for print photos, 72 or 96 for screens, or type your own.
  3. Read the same length in every unit below.

Pixels have no physical size on their own. How big a picture is on paper depends on the DPI: the same 1200 pixels are 4 inches wide at 300 DPI and 16.7 inches wide at 72 DPI. That is why the DPI matters for this conversion.

The table of common sizes shows how many pixels A4, Letter, passport photos and 4 x 6 in prints need at the DPI you chose. Changing the DPI of a file does not change its pixels; use Resize images for that.

Common questions

How many pixels is 1 cm?

At 300 DPI, 1 cm is about 118 pixels. At 96 DPI it is about 38 pixels. The formula is pixels = cm / 2.54 x DPI.

How many pixels is A4 paper?

At 300 DPI, A4 (210 x 297 mm) is 2480 x 3508 pixels. At 150 DPI it is 1240 x 1754 pixels.

What DPI should I use?

Use 300 DPI for printing photos, 150 for casual prints and drafts, and 72 or 96 for screens. Choose Other to type a different value.

How do I convert pixels to inches?

Divide the pixels by the DPI. 1800 pixels at 300 DPI is 6 inches.

Does this change my picture?

No. It is a calculator and does not use any file. To change the real pixel size of a picture, use Resize images.