Rcole
Well-Known Member
Hi,
I'm sure this formula is on the boards here somewhere, but thought I would post the formula for marking a stick to measure the volume of liquid in a round container as a function of the height of the liquid. So, here is how to figure out where to mark your dowel to indicate number of gallons:
Formula to Calculate Height Based on Volume is
h = v/pi r^2
Where h is height, v is volume, pi is 3.1415, and r^2 is radius squared
Note: radius = diameter/2
Note: 1 gallon = 231 cu inches
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Here is an example of how to solve for height in inches of a given volume, in a given pot diameter, say
4 gal. in 14" pot
h = v / (pi)(r^2)
h = 4*231/(3.1415)(7^2)
h = 924/(3.1415)(49)
h = 924/153.93
h = 6" for 4 gallons in 14" pot
I'm sure this formula is on the boards here somewhere, but thought I would post the formula for marking a stick to measure the volume of liquid in a round container as a function of the height of the liquid. So, here is how to figure out where to mark your dowel to indicate number of gallons:
Formula to Calculate Height Based on Volume is
h = v/pi r^2
Where h is height, v is volume, pi is 3.1415, and r^2 is radius squared
Note: radius = diameter/2
Note: 1 gallon = 231 cu inches
------------------
Here is an example of how to solve for height in inches of a given volume, in a given pot diameter, say
4 gal. in 14" pot
h = v / (pi)(r^2)
h = 4*231/(3.1415)(7^2)
h = 924/(3.1415)(49)
h = 924/153.93
h = 6" for 4 gallons in 14" pot