How many Gallons?

[OUCH!]

I found a tank today its 56 L X 21 w X 19 H dose any body know how many gallons it is?
I think it's a 100gal Breeder tank.
It's 1/2" glass

[jrossjr79]

96.7 gallons, but also taking consideration of tank thickness, 90 - 95 gallons:

http://reef.diesyst.com/volcalc/volcalc.html

[OUCH!]

I Checked it and it's half-inch glass