I'll +1 for
@HotRod19579 's "
A new calculator to try." It is the fourth calculator that I have used for more than a month and it is my last. It offers everything I am looking for. Besides recipe calculations; it has a great ingredient management system, label printing, notation capabilities for both recipes and individual flavors, good navigation, and the author/programmer is an active ECF member who is VERY responsive to problems, suggestions, and help requests.
If you are spreadsheet literate, another ECF member
@Scubabatdan, has a popular calculator that has a strong following as well. You can find his support thread stickied to the top of the DIY E-Liquid forum
or click on this link.
I looked at it, but I am intimidated by the spreadsheet style, so it was not the right one for me. I do see where it could be extremely useful to someone more competent than I.