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In an element with a 2in font, 1em thus means 2in. Expressing sizes, such as margins and paddings, in em means they are related to the font size, and if the user has a big font (e.g., on a big screen) or a small font (e.g., on a handheld device), the sizes will be in proportion.
Dec 14, 2021 · Basically 1em equals the inherited font-size on the current element. e.g. You can set font-size for your body element, and have all other elements use 'em' in their font-size and it will be relative to the size you set in the body. This is a nice way to make your fonts responsive (all you need to do is to change the size for your body once...)
1em is equal to the current font size. The default text size in browsers is 16px. So, the default size of 1em is 16px. The size can be calculated from pixels to em using this formula: pixels /16= em. Example. h1 { font-size: 2.5em; /* 40px/16=2.5em */ }
CSS Units. CSS has several different units for expressing a length. Many CSS properties take "length" values, such as width, margin, padding, font-size, etc. Length is a number followed by a length unit, such as 10px, 2em, etc.
Apr 16, 2009 · 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.
Aug 11, 2022 · In CSS, em is a relative unit for the size of the current element relative to the size of its parent. 1em corresponds to the exact size of the current element, 2em to double that size, 3em to triple that size, and so on. The most common use for the em unit is to set the font-size CSS property of HTML elements.
Feb 17, 2023 · In CSS, em is a unit of measurement for specifying font size. Unlike absolute units such as pixels or points, em is a relative unit that is based on the size of the parent element's font. If the parent element has a font size of 16 pixels, then 1em is equal to 16 pixels.
