calculating gallonage (plus pics)

[Strage]

Hi,
Is there anybody who can calculate the gallonage of my new tank for me ,it measures 79x17x27 1/2 Inches ,I bought it as a 580 litre/127.5 but I have read that sometimes retailers can be wrong about volumes.
Thnks in advance.
Kind regards
Strage

 

[Strage]

Sorry ,I forgot the link to my pics ,they are here: http://s395.photobucket.com/albums/pp33/Strage_2008/

 

[Camshaft Ramrod]

160 gallons
605 liters

Nice solid O by the way.

 

[chesterthehero]

http://www.monsterfishkeepers.com/forums/calc.php

theres a link at the top of every single page on this site