html - What are the differences between these web units? -


possible duplicate:
what difference px,em , ex?

what differences between these web units? pros , cons, , appropriate time use each of them?

px, ex, em, pt, %

px stands pixels. says on tin: each dot on screen pixel.

ex refers x-height of given font, i.e. height of lowercase letter x font.

em refers maximum height required font. commonly-used relative font size because calculated based on computed font size of element (or parent if inherited).

pt stands typographic point, 1/72 of inch.

% percentage relative given property otherwise inherited element's parent.

note em , % work same way. ems decimal representation of percentages, i.e. 1 = 100%, 0.01 = 1%.

you can find more units @ css3 spec.


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