Pixels to CM Conversion - 96 DPI & 300 DPI Guide

A pixel is a count, not a length. 1920 pixels across a screen is not the same physical width as 1920 pixels on a print file. To convert pixels to centimeters you must pick a DPI (dots per inch). This guide uses the two values that matter most: 96 DPI for web and on-screen work, and 300 DPI for print-ready design. You will get the formula, worked examples, a table of common resolutions in cm, and a path through the free converters on ToolsMinify.

The pixels-to-cm formula

Pixels convert to inches first, then inches convert to centimeters. One inch is exactly 2.54 cm, so the two steps collapse into one formula.

DPI (or PPI on screens) is how many pixels sit in one linear inch. A higher DPI packs the same pixel count into a smaller physical space. That is why a 300 DPI print of 1920x1080 is much smaller - and sharper - than the same resolution shown at 96 DPI on a monitor mockup.

• 1 inch = 2.54 cm (exact)
• At 96 DPI, 96 pixels = 1 inch = 2.54 cm, so 1 pixel is about 0.0265 cm
• At 300 DPI, 300 pixels = 1 inch = 2.54 cm, so 1 pixel is about 0.0085 cm

Worked examples at 96 DPI (web / screen)

96 DPI is the long-standing CSS and web reference density. Use it when you want the on-screen size of an image, banner, or layout in centimeters.

1920x1080 at 96 DPI

• Width: (1920 / 96) x 2.54 = 20 x 2.54 = 50.8 cm
• Height: (1080 / 96) x 2.54 = 11.25 x 2.54 = 28.575 cm (about 28.58 cm)
• Full frame: 50.8 x 28.58 cm

Other handy 96 DPI sizes

• 96 px = 2.54 cm (exactly one inch)
• 192 px = 5.08 cm
• 1080 px (one 1080p edge) = 28.58 cm
• 1920 px (the other 1080p edge) = 50.8 cm

For a Full HD-only inch table, see 1920x1080 resolution in inches. This article owns the centimeter side of the same math.

Worked examples at 300 DPI (print)

Print work needs a much higher density. 300 DPI is the usual target for crisp photos and graphics. At that density, a 1920x1080 file covers far less paper:

• Width: (1920 / 300) x 2.54 = 6.4 x 2.54 = 16.256 cm (about 16.26 cm)
• Height: (1080 / 300) x 2.54 = 3.6 x 2.54 = 9.144 cm (about 9.14 cm)
• Full frame: 16.26 x 9.14 cm

That is why a screenshot that looks large on a monitor can print small. 1920x1080 does not contain enough pixels to fill an A4 sheet (21.0 x 29.7 cm) at 300 DPI without scaling up and looking soft.

Common resolutions in cm (96 vs 300 DPI)

Here are five popular 16:9 resolutions converted at both densities. Each line reads as Resolution - size at 96 DPI - size at 300 DPI. Values are rounded to two decimal places.

• 1366x768 (common laptop) - 36.16 x 20.32 cm at 96 DPI - 11.57 x 6.50 cm at 300 DPI
• 1280x720 (720p / HD) - 33.87 x 19.05 cm at 96 DPI - 10.84 x 6.10 cm at 300 DPI
• 1920x1080 (1080p / Full HD) - 50.80 x 28.58 cm at 96 DPI - 16.26 x 9.14 cm at 300 DPI
• 2560x1440 (1440p / QHD) - 67.73 x 38.10 cm at 96 DPI - 21.67 x 12.19 cm at 300 DPI
• 3840x2160 (2160p / 4K UHD) - 101.60 x 57.15 cm at 96 DPI - 32.51 x 18.29 cm at 300 DPI

1080x1920 in cm (portrait / vertical)

Phones and vertical video use 1080x1920, which is 1920x1080 rotated. Width and height swap, so at 96 DPI it is 28.58 x 50.8 cm and at 300 DPI it is 9.14 x 16.26 cm. That is the aspect ratio behind Instagram Reels, TikTok, and YouTube Shorts full-screen frames - still a pixel grid, not a physical phone size.

CSS centimeters vs printed centimeters

In CSS, 1in is defined as 96px, so 1cm is 96 / 2.54, about 37.80 CSS pixels. That is a reference unit for layout, not a promise that 1cm in CSS will measure 1 cm on every monitor. Real screens have their own PPI. Printed centimeters are physical: they match a ruler when the file is output at the DPI you used in the formula.

If you are sizing a web mockup, 96 DPI is the right default. If you are sending a file to a printer, set 300 DPI (or the shop's requested density) and convert with that number - not with the CSS reference.

Convert with the free ToolsMinify converters

There is no separate pixels-to-cm widget yet. Use the two converters below: first pixels to inches at your DPI, then inches to centimeters (multiply by 2.54, or use the CM tool).

• Pixels to Inches Converter - enter pixels and DPI (96 or 300) to get inches, then multiply by 2.54 for cm.
• CM to Inches Converter - convert the inch result to centimeters, or go the other way for print specs in inches.
• How to use the Pixels to Inches Converter - step-by-step for web 96 DPI and print 300 DPI.
• 1920x1080 in inches - the inch companion to this cm guide, including monitor diagonals.

Frequently asked questions

How do I convert pixels to cm?

Divide the pixel count by the DPI, then multiply by 2.54. Example: 1920 px at 96 DPI is (1920 / 96) x 2.54 = 50.8 cm. Repeat for height if you have a full resolution such as 1920x1080.

What is 1920x1080 in cm?

At 96 DPI, 1920x1080 is 50.8 x 28.58 cm. At 300 DPI it is 16.26 x 9.14 cm. A real 1080p monitor is sold by diagonal (often 54.6 cm / 21.5 in, 61 cm / 24 in, or 68.6 cm / 27 in), so its panel size is not the 96 DPI reference.

How many cm is 1 pixel?

It depends on DPI. At 96 DPI, 1 pixel is 2.54 / 96, about 0.0265 cm (0.265 mm). At 300 DPI, 1 pixel is 2.54 / 300, about 0.0085 cm (0.085 mm).

Why do I need DPI to convert px to cm?

Pixels are samples. Centimeters are physical length. DPI is the missing scale: how many of those samples fit in one inch. No DPI means no unique answer in cm.

Should I use 96 DPI or 300 DPI?

Use 96 DPI for web, CSS, and on-screen mockups. Use 300 DPI for most print (photos, flyers, business cards). Some large-format print shops accept 150 DPI; use the density they specify.

Is a CSS cm the same as a printed cm?

No. CSS cm is tied to the 96px-per-inch reference. Printed cm is a ruler measurement after output at a chosen DPI. Always convert print files with the printer DPI, not with CSS units alone.

How do I convert cm back to pixels?

pixels = (cm / 2.54) x DPI. Example: a 10 cm width at 300 DPI is (10 / 2.54) x 300, about 1181 pixels. The Pixels to Inches Converter can do the inch step; the CM to Inches Converter handles 10 cm to inches first.