Easy to use and understand collection of eight different calculators. A) calculates the weight of several different type of materials in the following shapes, round, rectangle, and tube; B) The calculation gives you all necessary information including dimensions for measuring gear, known as an over wire dimension. These formulas came from a book Van Keuren Precision Measuring Tools. All the programs have been tested for accuracy; C) select the geometric shape you wish to calculate. A right triangle, circle, or a rectangle. enter the known numeric values press enter, and instantly get the results; D) easy to use, simply select the item you wish to convert. Enter the numeric value, and instantly you have your answer; e) linear Expansion calculates growth or shrinkage on various materials when different temperatures are applied; F) quickly view a calendar and a specific date in the future; G) do you need to know how much your monthly payments will be, here is a Simple loan calculator.