Trilithon Proportional is an easy to use percentage and ratio calculator, plus a simple units conversion calculator, created specifically to meet the needs of graphic designers, desktop publishers, and web site creators.

Compute Scaled Width and Height based on existing Width and Height and a percentage scale factor

Compute Percentage Scale Factor based on Width and Height you have, plus Width and Height you want

Convert Units from and to the most popular desktop publishing units

Drag and Drop numeric values into any of the text fields from Proportional windows or from other applications

Open Multiple Proportional Windows

Decimal Places selectable from one to eight places