This is a Google Spreadsheet for calculating the wire size for a specific loads.
Inputs include (Voltage, Load current, Circuit Distance, Wire Temp Rating)
It also calculates voltage drop, and has some extra derating features such as Engine Room, and Bundling.sheathing or conduit.
While the tool will supply a recommended wire size based on your input parameters, you will also be able to see the data in a spreed sheet form.
https://docs.google.com/spreadsheets...it?usp=sharing
Any questions or specific feedback is welcomed, especially if you see a discrepancy .
-greg