Need Help Calculating Volume

Ocho

Cuttlefish
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Jul 21, 2004
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I have a tank and I am not exactly sure on its capacity. Now I know how to
calculate the volume of simple objects, but this isn't the average rectangluar
aquarium. If you have a look at the pic, you see what I mean. I need to know
the the volume in (US)Gallons so I can be sure this would be suitable for a bimac
and so I can get the corrisponding equipment. :arrow:
Pent5.gif


Any info or ideas on how to do this would be appreciated.
:grad: Also if you know the answer please explain because
I am curious to know how it is done. Thanks!
 

cthulhu77

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Mar 15, 2003
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the way to work with these tanks, is to approach it geometrically (ah, those classes!):
first, treat the tank as if it is was a square:
26.5 x26.5x18 inches= 55 gallons
next, treat the triangled area the same:
26.5-7.5= 19, so : 19x19x18=28 gallons
subtract 28 from 55 = 22 gallons.
half of the 28 gallons then is added back in: 22 =14 =36 gallons !
This tank is usually sold as a 36 corner...perhaps a little small for a bimac...55's are easier to work with...but good luck!
greg

p.s. sorry for all the edits...figured it first in UK gallons... :|
 

Ocho

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Jul 21, 2004
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I think I have found a way to figure it out-
I divided it into 3 sections: A,B, and C

Pent5Geo.gif


Then I calculated the volume of each individual section... and came up with this:

A- 19” x 7.5” x 18” = 2565 in3
B- 26” x 7.5” x 18” = 3577.5 in3
C- 19” x 19” x 18” = 6498 in3 x 0.5 = 3249 in3

2565.0
3577.5
+ 3249.0
9391.5 in3


9391.5 cubic inch = 40.6558442 Gallon (US)

Can anyone second this?

P.s. Thanks for your replies!
 

Colin

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just let me throw a spanner in the works too :smile:

You need to take between 10 and 15% off the total for two reasons...

1) a tank is never filled to the very top
2) adding gravel etc displaces water...

so a 40 gal may be 34 gals (US)

cheers
 

joel_ang

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May 15, 2003
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Sorry bout the first one, it was way off due to some error, I re-did it and i got roughly 150 litres which works out to be 40 gal. :oops:
 

Nancy

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As I recall, the US gallon is slighty larger, but I don't know the conversion factor.

Nancy
 

Colin

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its the other way round nancy... An imp is bigger...

According to a bucket of tropic marin... it's big enough for 200 us gals or 165 imp gals (25kg bucket)
 

oscar

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Apr 18, 2004
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there are many good conversion calculators on the internet... type conversion, calculator and the measurements (eg. gallons imperial us litres etc) into google and you should get good results
 

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