A N-up calculator graphical user interface (GUI) is provided for performing N-Up printing. The graphical user interface includes configurable objects for specifying: 1) the size of the page, 2) the dimensions of the image, and 3) the number of images to be printed on each page (N-up). The controls on the GUI can include page size, reduction/enlargement percentage, final image size−height/width, Number up, and other related controls. The manipulation of any one of the controls may affect the others according to a set of rules. These rules determine which objects are held constant and for which values are automatically calculated, and the object automatically configured. The rule-set can be manipulated by selecting from a list of modes or options such as “Conserve Paper,” “Fit as Many Images as Possible” or “Maximize Image size” or by locking certain controls and freeing others.