Well it's not really all that funny.... because it was me
I measured the dimensions of my Pringles tube in centimetres, and from that I calculated the volume. Then using the volume I worked out the amount of oil needed using instructions from the sticky thread on calculating amount of oils for mould size. I used centimetres because I find them easier to work with than inches in situations like this.
But if you have an inch rule to hand, and a calculator, then you can work out the volume of your Pringles tube in cubic inches by following these steps:
1. measure the height of the tube in inches - call this 'h'
2. measure the diameter of the tube - the width of the circle - then halve this number to get the radius - call this 'r'
3. pi - this number is roughly 3.142
The volume of your Pringles tube, in cubic inches, is h x r x r x 3.142
That is the mathematical formula for working out the volume of a cylinder.
So you just plug in the numbers to get the volume in cubic inches.
Then you multiply this figure by
0.4 to get the weight of oils needed in ounces.
(If you were working in cubic centimetres then you would multiply by 0.7).
But there is another way!
http://convert-to.com/conversion/wa...z-of-water-weight-to-in3-of-water-volume.html
^^^
This is a link to a converter website which I found which will convert oz of water to cubic inches.
If you plug in your 32 oz of water, the volume you get is 55.36 cubic inches of water.
So if you multiply 55.36 by 0.4 you get 22.14 - which is the total ounces of oils.
I hope this helps