Pixels (px)	CSS Millimeters (mm (CSS))
1 px	0.2646 mm (CSS)
2 px	0.5292 mm (CSS)
5 px	1.3229 mm (CSS)
10 px	2.6458 mm (CSS)
25 px	6.6146 mm (CSS)
50 px	13.2292 mm (CSS)
100 px	26.4583 mm (CSS)
250 px	66.1458 mm (CSS)
500 px	132.2917 mm (CSS)
1000 px	264.5833 mm (CSS)

Convert Pixels to CSS Millimeters

Convert pixels to css millimeters (px to mm (CSS)) with our instant calculator. 1 px = 0.264583 mm (CSS). Includes exact formula and reference tables.

How to Convert Pixels to CSS Millimeters (px to mm (CSS))

1 Pixel (px) is equal to 0.264583 CSS Millimeters (mm (CSS)). Multiply the pixel value by 0.2645833333

Quick Answer 1 px = 0.264583 mm (CSS)

Formula mm (CSS) = px × 0.2645833333

Inverse Factor 1 mm (CSS) = 3.779528 px

Unit Definitions & Metrology Context

In standard digital design and CSS specifications (W3C CSS Values Module), the reference pixel (px) is calibrated to 1/96th of an inch (96 DPI baseline).

About Pixels (px): Pixel (px) is a unit in the Typography measurement category. It is widely used in css digital display baseline (96 dpi). The pixel (px) serves as the primary reference base unit for the typography domain.

About CSS Millimeters (mm (CSS)): CSS Millimeter (mm (CSS)) is a unit in the Typography measurement category. It is widely used in 3.78 px (css print spec). Relative to the typography base unit, 1 mm (CSS) equals 3.779528 Pixels (px).

Need to convert in the opposite direction? Visit our Convert CSS Millimeters to Pixels (mm (CSS) to px) calculator (1 mm (CSS) = 3.779528 px).

Step-by-Step Worked Examples (px to mm (CSS))

Convert 5 Pixels to CSS Millimeters: Applying the formula (mm (CSS) = px × 0.2645833333): starting with 5 px, multiply the pixel value by 0.2645833333 to get 1.3229 mm (CSS).
Convert 10 Pixels to CSS Millimeters: Applying the formula (mm (CSS) = px × 0.2645833333): starting with 10 px, multiply the pixel value by 0.2645833333 to get 2.6458 mm (CSS).
Convert 50 Pixels to CSS Millimeters: Applying the formula (mm (CSS) = px × 0.2645833333): starting with 50 px, multiply the pixel value by 0.2645833333 to get 13.2292 mm (CSS).

Popular Typography Conversions

Pixel ⇄ Rem

Divide pixels by 16 to get root rems (assuming default 16px browser base font size).

Rem ⇄ Pixel

Multiply rem by 16 to get the computed pixel value (1.5 rem = 24 px).

Point ⇄ Pixel

Multiply typography points by 4/3 (~1.333) to get CSS pixels (12 pt = 16 px).

Pixel ⇄ Point

Multiply CSS pixels by 0.75 (3/4) to get typography points (16 px = 12 pt).

Pica ⇄ Pixel

1 pica equals exactly 12 points or 16 CSS pixels.

Frequently Asked Questions

Verified answers and formulas for converting pixels to css millimeters.

How many css millimeters are in 1 pixel?

There are 0.264583 css millimeters (mm (CSS)) in 1 pixel (px). Conversely, 1 css millimeter equals 3.779528 pixels.

How do you convert pixels to css millimeters?

To convert pixels (px) to css millimeters (mm (CSS)), use the formula: mm (CSS) = px × 0.2645833333. Multiply the pixel value by 0.2645833333. For example, 10 px equals 2.6458 mm (CSS).

How do I convert back from css millimeters to pixels?

To convert in the reverse direction from css millimeters (mm (CSS)) to pixels (px), use the inverse formula: px = mm (CSS) × 3.779527559. Multiply the css millimeter value by 3.779527559 (1 mm (CSS) = 3.779528 px).

What is the difference between pixel (px) and css millimeter (mm (CSS))?

Both pixel and css millimeter measure typography. Pixel (px) is a unit in the Typography measurement category. It is widely used in css digital display baseline (96 dpi). The pixel (px) serves as the primary reference base unit for the typography domain. CSS Millimeter (mm (CSS)) is a unit in the Typography measurement category. It is widely used in 3.78 px (css print spec). Relative to the typography base unit, 1 mm (CSS) equals 3.779528 Pixels (px).

How do you convert pixels (px) to rem?

Divide the pixel value by 16 (assuming default root font size of 16px). For example, 16px = 1rem, 24px = 1.5rem, and 32px = 2rem.