# Thread: Can anyone help me with this?

1. ## Can anyone help me with this?

Apublishing project will require a calculation of the book's spine width. Theformula reads thusly: "Total page count divided by paper thickness."A more precise mathematical spine width formula is: "page count/2 x papergram weight x paper volume /1000 - rounded up to nearest whole number

2. ## Re: Can anyone help me with this?

What is it that you need help with? Is there some question you are trying to answer, or problem you are trying to solve with this information?

3. ## Re: Can anyone help me with this?

1. A publishing project will require a calculation of the book's spine width. The formula reads thusly: "Total page count divided by paper thickness." A more precise mathematical spine width formula is: "page count/2 x paper gram weight x paper volume /1000 - rounded up to nearest whole number."

So a 100-page book using paper which is 80 gsm with a volume of 1.8 would require a spine width of 8 mm. I am trying to figure out how this answer was achieved.

4. ## Re: Can anyone help me with this?

$\displaystyle \frac{100}{2}\times80\times\frac{1.8}{1000}=7.2$, and 7.2 rounded up is 8.

5. ## Re: Can anyone help me with this?

Originally Posted by impressu2
So a 100-page book using paper which is 80 gsm with a volume of 1.8 would require a spine width of 8 mm. I am trying to figure out how this answer was achieved.
Just substitute the given quantities into the formula (assuming that the volume is given in the correct units):

$\displaystyle \frac{\mathrm{pages}}2\times\mathrm{grammage} \times\frac{\mathrm{volume}}{1000}$

$\displaystyle = \frac{100}2\cdot80\cdot\frac{1.8}{1000} = 7.2\ \mathrm{mm}$

If we're rounding to a whole number, we'll need a spine width of 8 mm (7 is closer, but it isn't wide enough).

6. ## Re: Can anyone help me with this?

Thank you so much for your help with this.