Tank Calculator

Do you know the dimensions of the tank you need but are unsure of the gallons? – Maybe you need a tank to fit into a specific and tight space?

The Tank Capacity Calculator below allows you to type in your desired tank diameter and height and provides an estimated volume by gallon amount. If you want to also calculate the freeboard (space at the top of the tank so the water level never touches the top) then use this optional field, remember that 4-inches would be calculated using .3 in that space.

Once you know the gallon amount please click here to go to our “Search All Tanks” page and find the appropriate style tank in the gallon increment you need.

And, you can always call us at 866-959-8237 any weekday from 8am to 5pm PST with any questions.