Most of us take our toothpaste for granted. We pick it up at the grocery store
when we shop for groceries and we always have enough. We don't
think about how much toothpaste we use.
We Could Simply Guess
We Could Calculate The Amount Needed
|The net weight of the tube of toothpaste is 4.2 ounces |
as shown on the above packaging label.
When we squeeze toothpaste from the tube it leaves as a cylinder roughly equal to the inside diameter of the nozzle of the toothpaste tube (measured at 0.280 inches). The length of the cylinder of toothpaste dispensed is just short of the length of our toothbrush--approximately 1 inch. The volume of the cylinder of toothpaste for a single brushing is 0.062 cubic inches.
|As we squeeze toothpaste from the tube it comes out as a cylinder equal |
to the inside diameter of the nozzle. The length of the cylinder
is approximately equal to the length of the toothbrush.
Each 4.2-ounce tube of toothpaste provides 52 brushings (4.2 ounces divided by 0.062 cubic inches per brushing). The eight months that we will be cruising is equal to 240 days. So, we will need five (4.61 by calculation) tubes of each different type of toothpaste for an entire trip.
There are a couple other items we can calculate our needs in advance--canned cat food is one of them. For other items we are monitoring how much we use per month and will be multiplying by eight months to calculate our needs. We plan to buy milk, cheese, eggs, and baked goods locally as needed.