Want to know how much water your aquarium can hold?
Use our handy calculator to find out just how many gallons (or liters) of water your aquarium is capable of holding.
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Notes on Aquarium Capacity:
Now that you know the volume of water that your aquarium can hold, you will want to be mindful of one fact:
Your aquarium will never actually hold this much water.
For instance, I have never met anyone who fills their aquarium all the way to the top of the tank. Any gap that you leave here will mean that there is less water in your tank.
Also, anything that you place in your tank will remove the same amount of water. Fish, rocks, coral, substrate, decorations… These all mean that there is less water in your tank.
Think of it as though you are filling your bath to the top with water and sliding in – the water is going to overflow because your body is taking up space where the water previously was.