Although Microsoft Excel itself is a big calculator, using Excel Macro & VBA remains a popular method to create a calculator. Obviously, lots of coding is required to build a prototype of a calculator ...
If programming or scripting in general scares you, you don't need to worry either. You don't need to be a programming wizard ...
Commercial off-the-shelf software such as Microsoft Excel lets you automate engineering functions (references 1 through 3). This Design Idea explains how you can use Excel to calculate the values of ...