Approximate volume required

Hi i have just ordered myself a new tank as a display tank & was hopeing someone could tell me how to work out the approximate volume of water it would hold & can anyone recomend an external filter for it? The size in inches is 66" x 18" x 30" any help would be great.

Paul..

I have just found the aquarium volume through TAF 11 web site & approx volume is 498.8 litres all i need now is recommendations on external filters.

Paul

usefull tool

http://www.fishforums.net/aquarium-calculator.htm

Cheers Simon now im confused as that tool has just told me the volume is 584 litres

There are 6.25 gallons per cubic foot
so 5 1/2 x 1 1/2 x 2 1/2 = 20.625 cubic feet = 128.9 gallons

1 gallon = 4.545 litres = 585.9 litres

So the aquarium calculator is correct, although those calculation don't allow for the thickness of the glass, the gravel & rocks on the bottom, and assumes you've got it full to the brim.
It's often suggested that you allow 10-15% of the theoretical volume for these factors...

586 litres - 15% = 498 litres which is what TAF II suggests

Cheers Rob you have come to the rescue again.I THANK YOU KIND SIR