How would i find out how many gallons an octagon tank is?

As for a formula to calculate I have no idea. if the tank is small enough (and mine was) I used a 1 gallon pitcher and filled it that way

Hope this helps.

www.fishlore.com/ConversionCalculator.htm

I got a hexagone and calculated tha whole height lenght depth.
Later i calculated the edges (like 10"x10"x 2') and took those off the whole volume

Noddy wrote:


noddy is spot on

Measure the maximum length L, width W and height H and multiply these (LxWxH), we will call this A

Then you need to measure the volume of the corners that have been cut off. Take the maximum length and subtract the length of the front, we will call this lenght Y. The volume of all 4 corners is height multiplied by Y and then again by Y and then double it(H x Y x Y x 2). We will call this B

The volume of your tank is A-B

thanks

give us the width of all sides, as well as the height, and we can
do some calculation for you.....

All six of the sides are 10" and it's 25" tall.

heres a link to calculate volume in irregular shaped tanks.



reef.diesyst.com/volcalc/volcalc.html


just plug in your numbers and off you go...........

thank you

nikkirenee wrote:

28 US gal size