how thick does aquarium glass need to be

[indochina1975]

i want to know is there anything such as online calculator to calculate the minimum thickness for aquarium glass bottom
if it exists please link it
if it doesn't exist what is the formula to know the minimum thickness for aquarium glass bottom

 

[Akeno071]

Theres a thread regarding this somewhere.
Glass thickness is based off the amount of preassure exerted by the water, naturally as pressure increases by having deeper water, your glass thickness in an aquarium is based off your height.