At-a-glance Slideout calculator for planners Slideout® Calculator for Planners, Fits 8 x 10-7/8 or Larger Books New product, makes planning even easier. Easily access calculator using pull-out feature. Slideout® platform can also be used as a pagemarker. Flat, compact design. Features pen loop and multiple business card slots or storage pocket. Attach to the front or back of your planner. Solar calculator included.