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Conversion of Twips into Inches, Centimeters and Millimeters
Twips are screen-independent units used to ensure that the placement and proportion of screen elements in your screen application are the same on all display systems. A twip is a unit of screen measurement equal to 1/20 of a printer's point. The conversion between twips and inches/centimeters/millimeters is as follows:

There are approximately 1440 twips to a inch (the length of a screen item measuring one inch when printed).

As there are 2.54 centimeters to 1 inch, then there are approximately 567 twips to a centimeter (the length of a screen item measuring one centimeter when printed).

Or in millimeters, as there are 25.4 millimeters to 1 inch, therefore there are approximately 56.7 twips to a millimeter (the length of a screen item measuring one millimeter when printed).

Note: Twips are sometimes confused with pixels, which is short for 'picture element'. A pixel is a dot that represents the smallest graphical unit of measurement on a screen. A pixel is screen-dependent; that is, the dimensions of screen elements vary with the display system and resolution.


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Ken Howe 2011