How Many Gallons?

[kevin34]

Does anyone know the math formula thing that tells you how many gallons a tank is going by the dimensions of the tank? And how would that apply to a cylinder shaped tank?

 

[zman1]

Cubic inches *.0043= gallons
For Area of a circle -- Diameter squared * pi/4 or Radius squared * pi
12" diameter by 24" tall=
12" squared (144") * 3.14 / 4 = 113.04 square inches
144" * 3.14 / 4 = 113.04 square inches
113.04" X 24" = 2712.96 Cubic inches (volume)
2712.96 * .0043 = 11.6657 gallons

 

[kevin34]

Wow. Is there an accurate estimating process?

I'm just doing this as kind of a side project so I dont need to be dead on.

 

[mrinelfrlz]

example: 75 gallon DT
48x18x20= 17,280 / ( divided) 231=74.80519481
rounded to 75 gallons
easy enough

 

[zman1]

My previous post is the way to calculate the volume of a cylinder in gallons.
What are the messurements in inches for Diameter and Height?

 

[zman1]

Originally Posted by MrineLfRlz
example: 75 gallon DT
48x18x20= 17,280 / ( divided) 231=74.80519481
rounded to 75 gallons
easy enough

This isn't the way you calculate a volume for a cylinder which was the 2nd part of the question...

 

[kevin34]

Is there a way I can move this thread to the aquarium section? I am just brainstorming some ideas for my future dream tank and I want it to be a cylinder.

 

[iampumpkinman]

I know an easier way to do it.
LengthxWidthxHeightx7.48.
But you have to take the inches in the lwh, and turn that into feet.
Example:
a tank 16 inches long is 16/12=1.3 feet.

 

[mrinelfrlz]

is this even close?
A=pi(D)to second power x H
divide that by 231?
i think this is it!
im looking in my fluid power book
so you have lets say a 15" diameter tank and its 20" high
so
A=pi (15) to the second power X 20=14,137.16694 / 231= 61.19985689 GALLONS rounded to 61 gallons

 

[zman1]

I do know how to calculate volume of a cylinder...
Originally Posted by zman1
For Area of a circle -- Diameter squared * pi/4 or Radius squared * pi
Yes, once you know the cubic inches, you can either mulitple by .0043 or divide by 231 (or 232)
1/.0043 = 232.55813953488372093023255813953
or
1/232 = 0.004310344827586206896551724137931
Guys maybe this will help you understand, you must find the area of the circle first and then multiply by the height to find total cubic inches in a cylinder (volume).
http://www.mathgoodies.com/lessons/v...rcle_area.html