If you’re not a four square user, your toilet paper may go quicker than expected.
That’s where the tp calculator comes in. Yes, one exists! How Much Toilet Paper works like this: you tell it how many times you go to the bathroom each day and how many rolls you have. The calculator, which doesn’t account for “bad” trips to the bathroom, will share how many days you have until running out.
Advanced options let you input how many people are in your home and the number of sheets you have on a roll… if you want to know precise info.
Remember...only buy what you need!
Source: The Verge