Pixel is a static measurement, while percent and em are relative measurements.

Font size em. } this gives a p size of 14px, h1 of 28px, h2 of 25px. In an element with a 2in font, 1em thus means 2in. Say you have a sizing structure something like this:

Press enter key or click the convert button to get it's px equivalent. Set font size with em Equally if you want to use whatever size the browser uses just use:

The em size of a font is equal to its point size. Web each character fits inside that em square or em box. Web the em and rem are the relative (or flexible) units as oppose to px, which is an absolute (or fixed) unit.

Web meet the units “ems” (em): Web they scale according to the viewport. Ems are scalable in nature, so 2em would equal 24pt,.5em would equal 6pt, etc.

Web if you haven't set the font size anywhere on the page, then it is the browser default, which is often 16px. The advance measure (width) of the glyph 0 of the element's font. 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. It continues on to say: Web a unit of measurement, 1em is equal to the size of a font.