Scaletron! 3.0

Scaletron! is a scaling calculator — an electronic replacement for the old graphic arts proportion wheel, used for calculating enlargements and reductions of artwork.

Great for sizing scans and artwork, calculating page enlargements or reductions and other layout or output needs, Scaletron! is an ideal tool for graphic artists, digital photographers, web designers, scanner operators and prepress technicians.

Scaletron! is simple to operate, yet provides several options as to which parameters you want to enter and calculate such as:
Enter an original width and a new width to get the scaling percentage.
Enter an original width and a percentage to obtain the new width.
Enter an original width and height and a new width and get the scaling percentage and the new height.
Determine the effective resolution of your images after enlargement or reduction.