Print Size Calculator - Demo

Calculates possible print sizes, in inches, matching an image’s apect ratio.

Enter an image width and height to caclulate the print sizes at the same aspect ratio possible on a 13" x 19" sheet (maximum print area). Print sizes are formatted as whole and fractional inches. Each print size is one inch smaller than the next largest, starting with the largest possible print size, down to a print six inches on the long side.

You can modify the scripts to use a different page size, delta between print sizes, and minimum desired print size.

About the Code

This page depends on three JavaScript files to implement print size caluclations and formatting.

• prettyinches.js contains functions to format values in points or decimal inches as whole and fractional inches. Example: 2.625 is 2 5/8". This is hard-coded to round to the nearest 1/16 inch, but could be modified to use more or less precision.
• aspectratio.js contains a class to represent an aspect ratio and functions that return the closest "standard" aspect ratio of two dimensions (ex: 2:3, 3:4, etc.).
• printsizes.js contains a class represnting a print size and a function that generates a list of possible print sizes for a specific image and page size. This is hard coded to make sizes 1-inch apart, but could be modified to use a different delta.

The page also uses jQuery to implement the demo user interface.