Yet another calculator
Yeah, another 1. If ya find it useful - Enjoy! If not (I don't) don't worry about it.
Enter an amount in Main Flour, and percentages for the other stuff (as noted) - It'll give a final weight and hydration, and of course how much to scale (for both preferment and final dough.
I think the link is fixed
11-24-20 - fixed math (and logic)