It sounds easy enough until you realize that the number of rotations doesn’t directly correlate to the number of sheets rolling off the end. Every rotation of a full roll of TP yields four sheets, on average. But when it gets down close to just the cardboard roll, that drops to just a single square per rotation. Taking that into consideration the square count isn’t 100% accurate, but it’s close enough to provide a rough idea of when toilet paper usage spikes, and who’s potentially to blame.
The person on the throne sees their TP usage stats displayed on a simple two-line LCD, but that data is also graphed and shared publicly on ThingSpeak where anyone with an internet connection and a browser can monitor the day to day TP usage in the Miller household. And you thought everyone posting their Wordle progress on Twitter was oversharing.