Understanding - Cascading Style Sheets Lotech Solutions ( Jump to site home pagewww.lotechsolutions.com)

Understanding sizes in CSS

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This topic explores the units of length in CSS, and the differences between absolute and relative measurement.

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CSS Length Unit Table

Relative length units
em The height of the element's font.
ex The height of the letter "x".
px Pixels.
% Percentage.
Absolute length units
in Inches (1 inch = 2.54 centimetres).
cm Centimetres.
mm Millimetres.
pt Points (1 point = 1/72 inches).
pc Picas (1 pica = 12 points).

 

Absolute or Relative

Measurements and positions in Cascading Style Sheets (CSS) properties are indicated in length units. Internet Explorer supports two types of length units: relative and absolute.

A relative length unit specifies a length in relation to another length property. Relative length units scale better from one output device to another, such as from a monitor to a printer.

An absolute length unit specifies an absolute measurement, such as inches or centimetres. Absolute length units are useful when the physical properties of the output device are known.

 

See Also

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