Thanks for posting the tool. I have been playing around with it and am amazed at how much the numbers can change based on the depth of the measuring cup. Fortunately for me, I use only one set of (metal) measuring cups (straight-sided) and measuring spoons so at least I have been consistent to that extent when doing my conversions.
Based on my preliminary use of the tool I have the following comments and hope they make sense:
1) The most common question that members have when dealing with weights of flour is how the weights convert to cups, fractions of a cup, tablespoons, teaspoons, etc. Will the reverse tool be able to provide those conversions, and, if so, will users have to select the size(s) of the measuring cups they will be using?
2) Will other flours besides bread flour be added to the tool? The usual suspects are all-purpose, bread, high-gluten, and Caputo 00 Pizzeria flour. Even among brands there may be slight variations (e.g, the King Arthur flours are well known and advertised as having a bit higher protein content than competing brands), but I assume that those variations are too slight to worry about.
3) Is there a standard or recommended way of filling a measuring cup to achieve the weight (approx.) given by the tool? Also, as you know, recipes given in volumes, e.g., cups of flour, almost never tell you how the measuring cup was filled or what type of measuring cup was used. I can't see how the tool will be able to provide those answers.
4) Will it be possible for users to enter the number of cups to be converted to weight, e.g., 4 1/2 cups of bread flour weigh "x" grams? In the example given, will full cups and half-cups be handled separately?
5) I noticed that when I used the tool and entered the requisite data, I had to click on the page (anywhere) to have the answer provided. Maybe it's my computer but is it possible to add an "Enter" button?
6) Is it possible to also provide the answer in ounces for those who do not use metric?