glass thickness - ideal ratio?

[clownbaby]

Just basically cannot get a straight answer on google. Is there some sort of calculation or ratio for how thick glass should be per a number of gallons?

E.g., if it was 1/4 inch per 20 gallons, one could then use that to determine that a 40 gallon tank should have 1/2 inch thick glass and so on

[TAB]

no because gallons means nothing when it comes to needed strength.  the span, height and support (rim, rimless, euro braced and etc) is what is important.

 

 

take a 20 long vs a 20 h.   a 20 long can get away with 5 mm glass on the sides and 6.5 mm glass for the bottom.  A 20 high needs 6mm glass for the sides and 9 mm for the bottom.

 

same tank volume, but drastically different glass thicknesses.  this is for a stanard tank with 3.5-4x safety factor.   

[Woowala]

Just google aquarium glass thickness calculator.  Try a few to make sure the numbers are in agreement and look for a safety factor of ~4 or more.

[mynameisnobody]

Length width height are important, gallons are irrelevant.