PXtoEM.com: PX to EM conversion made simple.
What is an EM? Wikipedia puts it well: "An em is a unit of measurement in the field of typography, equal to the size of the current font." If your font-size is at 16 pixels, then 1em = 16px What is the text sizing difference between PX, EM, %, PT? Pixels and points are static measurements, but commonly used in different mediums. Pixels are used on screens because screens are measured in pixels.
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