Conversion to liquid volume in gallons

Don't know how to calculate the area of your garden or circumference of a pond? Ask your question here.
Forum rules
Dear convert-me.com forum visitors,

Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.

All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on convert-me.com FaceBook page

Thank you for being with us and sorry for any inconveniences this could caused.

Conversion to liquid volume in gallons

Postby Wayne Proudlove » Sun May 31, 2009 12:07 am

I have a cylindrical tank that lays in a cradle on it's side. The tank is 20 feet long and 5 foot 4 inches in diameter. I want to figure out the volume of the tank in gallons. I would also like to know how to extrapulate a table for gauging the tank from the top when it lays on its side and it would vary the per inch amount in the curve of the tank.
Wayne Proudlove
 

Re: Conversion to liquid volume in gallons

Postby Dirtman » Mon Jun 01, 2009 2:02 am

Wayne Proudlove wrote:I have a cylindrical tank that lays in a cradle on it's side. The tank is 20 feet long and 5 foot 4 inches in diameter. I want to figure out the volume of the tank in gallons. I would also like to know how to extrapulate a table for gauging the tank from the top when it lays on its side and it would vary the per inch amount in the curve of the tank.


The formula for the volume of a cylinder is: PI*radius^2*length. It can also be written as: (PI*diameter^2*length)/4.

Assuming measurements are inside dimensions and the tank has flat ends:
Diameter: (5' * 12") + 4" = 64"
Length: 20' * 12" = 240"

(PI * 64"^2 * 240") /4,
(3.1415927 * 4096 * 240") /4 = 772,077.81 in^3
There are 231 in^3 in 1 gallon, so 772,077.81 in^3 / 231 in^3/gal = 3,342.33 gallons.

Calculating horizontal cylinder tank volumes by the inch is much more complicated. Go to http://vps.arachnoid.com/TankCalc/ and run the applet. Use inches for length units. If tank ends are flat, enter 0 in the "end cap radius" fields.

If you need further help, repost.
Dirtman
Expert
 
Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California

Re: Conversion to liquid volume in gallons

Postby greg » Sat Dec 15, 2012 2:22 am

if you have a pipe that is 9.5 inches in diameter how long would the pipe need to be to equal 4 gallons.
greg
 

Re: Conversion to liquid volume in gallons

Postby Dirtman » Mon Dec 17, 2012 11:45 pm

greg wrote:if you have a pipe that is 9.5 inches in diameter how long would the pipe need to be to equal 4 gallons.


First, determine the gallons per inch, then divide gallons wanted by gallons per inch.

1) There are 231 cubic inches in a gallon (exactly) and 2) the formula for volume of a cylinder is: PI x radius squared x length.

Determine the gallons per inch:
PI x 4.75" radius squared x 1" deep = 3.1415927 * 22.5622 * 1 = 70.88219 cubic inches
70.88219 cubic inches / 231 cubic inches/gallon = 0.306849 gallons/inch

Determine length of pipe (in inches) needed to hold 4 gallons:
4 gallons / 0.306849 gallons/inch = 13.036 inches
Dirtman
Expert
 
Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California


More info

  • List of all units you can convert online
  • Metric conversion
  • Convert grams to cups
  • Grams to milliliters
  • Imperial vs US Customary
  • History of measurement
  • Return to Calculating things

    Our Privacy Policy       Cooking Measures Converter       Metric conversions