Is there a way of calculating the number of sheets of toilet paper on roll, without counting them?

Question

...using radius of roll minus tube radius and the dimentions (thickness, length etc) of one sheet?

Answer 1

Sure there is. You can calculate the volume of one sheet, and you can calculate the volume of the entire roll. Divide the second by the first, and you get a sheet count.

The volume of a single sheet is length*width*height.
The volume of the roll is pi*R^2*h - pi*r^2*h, where R is the radius of the full roll, r is the radius of just the cardboard tube, and h is the height of the cylinders.

I don't recommend actually trying to do this in practice: in reality, you could get widely differing answers depending on how tightly the paper was wound on the roll. You'd get somewhat more accurate results by determining the weight a single sheet, the full roll, and the cardboard tube, and doing some math with that.

Answer 2

yes, you could do that, or you could just read the total off the wrapper. If you opt for the calculation, you'd have to assume that all rolls are wound with the same tension on the paper during the winding. Otherwise you might just be measuring the differences in tension.

Answer 3

yes, weigh out 1 sheet in grams, then weigh out the whole role. divide the 1 sheet weight into the whole roll weight and thats the number of sheets!!

Answer 4

rattling Atheists!! I swear!! you merely won't be able to win with those human beings!! each so often I merely pray for the poop to fall off "by making use of itself".i don't like spending GLP ( God's Love factors to all you bathroom paper and parking spot hogging atheists ) that way yet I gotts to do what I gotts to do.

Answer 5

yea or u could read the package or box or w/e it came in ;)

Answer 6

oh - i was just gonna say look on he package