I have a calculator app on my phone that will let me create custom calculator tools. I created the Weaving Calc 1 just for fun. Well, mostly just to see if I could do it. It might come in handy if I take up weaving again.
Here is the top part of the calculator showing the part that let's you calculate warp yarn needed for a project. You have to scroll to get to the part that let's you calculate weft yarn needs.