You could fold it over many times to make it thicker, then if you have vernier calipers, you could measure the layered foil and then divide by how many layers that you have.
If you do not have vernier calipers I suppose you could still do the same thing but it would not be very accurate.
I am thinking that if you have a roll of foil and you know the total length, you could probably also use some form of calculus to work it out ??
You could fold it over many times to make it thicker, then if you have vernier calipers, you could measure the layered foil and then divide by how many layers that you have.
If you do not have vernier calipers I suppose you could still do the same thing but it would not be very accurate.
I am thinking that if you have a roll of foil and you know the total length, you could probably also use some form of calculus to work it out ??