There are many things to consider when looking for the right tank for your snail pet. Obviously, those variables are different whether you have a land snail or a water snail.
However, one of the first things to take into account, regardless of the snail type, is the tank size.
You can use the two calculators below to better understand what size of tank you need.
Tank Dimensions Calculator
If you have the length, width and depth of the tank and you want to know its size in gallons, you can calculate it here.
Tank Size Calculator
There are many factors to consider the amount of snails you can have in a given tank. However, basic rule of thumb are shown in this calculator. Give it a try!
You can also try looking into specific articles for the number of snails for a 10 gallons tank.