16 px at the browser default root font size. Change the root size on the converter above if your stylesheet overrides it.

What is the difference between px and dp?

A CSS px and an Android dp are both density-independent references — 1 dp = 1 px at 160 dpi. Physical device pixels differ by the screen density factor (@2x, @3x).

How do I convert px to mm for print?

At the CSS reference of 96 DPI, 1 px = 0.264583 mm. For real print output, divide by your actual DPI — a 300 DPI pixel is 0.0846 mm.

Unit-To-Unit Pixels conversion

Pixel & CSS Unit Converter

1 CSS pixel = 0.0625 rem

CSS defines its absolute units against a reference pixel of 1/96 inch, so px, pt, pc, in, cm and mm all convert exactly — one inch is 96 px, one point is 4/3 px. Font-relative units are the exception: rem and em depend on the root font size, which defaults to 16 px in every browser but is frequently changed. The root font size is editable on the live converter so a design system on a 10 px or 62.5 percent root converts correctly.

Formula rem = px ÷ root font size (default 16)

Pixels

17 units, base CSS pixel at 96 DPI. px by default.

Root font size px — drives rem, em and sp

Convert from

Enter value to convert from (digits only, max 24)

Results update on every keystroke.

=1 css pixel equals

Decimals 6

Equals to

0.062500

Root emrem

0.062500

Emem

0.750000

Pointpt

0.062500

Picapc

0.010417

Inch (96 DPI)in

0.026458

Centimetrecm

0.264583

Millimetremm

1.058333

Quarter-millimetreQ

15.000000

Twiptwip

1.000000

Android dp (160 dpi)dp

1.000000

Android sp (1 sp = root/16)sp

1.000000

iOS pointpt (iOS)

2.000000

Device pixel @2xpx @2x

3.000000

Device pixel @3xpx @3x

0.750000

Print pixel (72 DPI)px @72dpi

3.125000

Print pixel (300 DPI)px @300dpi

CSS pixel to Root em — quick reference
CSS pixel	Root em
1 px	0.0625 rem
2 px	0.125 rem
3 px	0.1875 rem
5 px	0.3125 rem
10 px	0.625 rem
25 px	1.5625 rem
50 px	3.125 rem
100 px	6.25 rem
250 px	15.625 rem
500 px	31.25 rem
1000 px	62.5 rem

Popular pixels conversions

CSS pixel to Root em Root em to CSS pixel CSS pixel to Point Point to CSS pixel CSS pixel to Millimetre CSS pixel to Inch (96 DPI) Android dp (160 dpi) to CSS pixel

Learn more

Frequently asked

How many px is 1rem?: 16 px at the browser default root font size. Change the root size on the converter above if your stylesheet overrides it.
What is the difference between px and dp?: A CSS px and an Android dp are both density-independent references — 1 dp = 1 px at 160 dpi. Physical device pixels differ by the screen density factor (@2x, @3x).
How do I convert px to mm for print?: At the CSS reference of 96 DPI, 1 px = 0.264583 mm. For real print output, divide by your actual DPI — a 300 DPI pixel is 0.0846 mm.

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