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1. www.w3.org › Style › ExamplesCSS: em, px, pt, cm, in… - World Wide Web Consortium (W3C)

   www.w3.org › Style › Examples

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   • em, px, pt, cm, in… CSS offers a number of different units for expressing length. Some have their history in typography, such as point (pt) and pica (pc), others are known from everyday use, such as centimeter (cm) and inch (in).
   • Use em or px for font sizes. CSS inherited the units pt(point) and pc(pica) from typography. Printers have traditionally used those and similar units in preference to cmor in.
   • More units in CSS. To make it even easier to write style rules that depend only on the default font size, CSS has since 2013 a new unit: the rem. The rem(for “root em”) is the font size of the root element of the document.
   • Site navigation. CSS home. Learn & use. Soft­ware. Par­tic­i­pate / drafts. Bert Bos, style activity lead. Copyright © 1994–2021 W3C Privacy policy. Created 12 Jan 2010;

2. stackoverflow.com › questions › 4474107What is the em font-size unit? How much is it in pixels?

   stackoverflow.com › questions › 4474107

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   Dec 14, 2021 · Learn what em is, how it relates to pixels, and how to use it for responsive fonts. See answers from experts and users on various aspects of em, such as IE bug, M-principle, and ancestor magnification.

3. People also ask

   Is 1em a PX size?

   • There are now lots of sources which say that 1em = font size (in px). That is, when you write font-size:16px, then 1em = 16px. This still doesn't agree with the Adobe source (which says 1em = the font size in pt ), but in either case it seems bizarre; the em size would be far too large with condensed fonts and far too small with extended fonts.

   What is the em font-size unit? How much is it in pixels?

   stackoverflow.com/questions/4474107/what-is-the-em-font-size-unit-how-much-is-it-in-pixels

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   What is a 1 em font size?

   • Here’s the scoop: 1em is equal to the current font-size of the element in question. If you haven’t set font size anywhere on the page, then it would be the browser default, which is probably 16px. So by default 1em = 16px. If you were to go and set a font-size of 20px on your body, then 1em = 20px.

   px - em - % - pt - keyword | CSS-Tricks - CSS-Tricks

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   What are EM values?

   • Em values are probably the most difficult values to wrap the ol’ noodle around, probably because the very concept of them is abstract and arbitrary. Here’s the scoop: 1em is equal to the current font-size of the element in question. If you haven’t set font size anywhere on the page, then it would be the browser default, which is probably 16px.

   px - em - % - pt - keyword | CSS-Tricks - CSS-Tricks

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   What is em in HTML?

   • The most common use for the em unit is to set the font-size CSS property of HTML elements. However, em can be used for any property where a size is expected (for example, for the padding, margin, line-height, height, width, max-height, max-width, etc.).

   What Is the Em Unit in CSS? - Maker's Aid

   makersaid.com/what-is-em-css/

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4. www.w3schools.com › css › css_font_sizeCSS Font Size - W3Schools

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   Learn how to set the size of the text with CSS properties, such as pixels, em, percent and vw. 1em is equal to the current font size, which is 16px by default in browsers.

5. www.w3schools.com › cssref › css_unitsCSS Units - W3Schools

   www.w3schools.com › cssref › css_units

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   Learn about different units for expressing length in CSS, such as pixels, ems, rems, and viewports. See examples, browser support, and tips for using relative units.

6. www.freecodecamp.org › news › css-unit-guideCSS Unit Guide: CSS em, rem, vh, vw, and more, Explained

   www.freecodecamp.org › news › css-unit-guide

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   Feb 3, 2020 · Learn how to use different units of length and size in CSS, such as pixels, centimeters, ems, rems, and viewports. Find out how they are calculated, inherited, and affected by fonts and devices.

7. css-tricks.com › css-font-sizepx - em - % - pt - keyword | CSS-Tricks - CSS-Tricks

   css-tricks.com › css-font-size

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   Apr 16, 2009 · Learn how to set font-size in CSS using different units of measure, such as pixels, ems, percentages and keywords. Compare the advantages and disadvantages of each method and see examples of how they work.

8. makersaid.com › what-is-em-cssWhat Is the Em Unit in CSS? - Maker's Aid

   makersaid.com › what-is-em-css

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   Aug 11, 2022 · Learn how to use em, a relative unit for the size of a CSS property based on that of its parent. See examples of em units for font-size and other properties, and how they differ from fixed units.