Aquarium Volume & Weight Calculator
Calculate aquarium volume, water volume, substrate weight, and total weight when full to ensure your floor can handle the load.
Results
What is it?
The Aquarium Volume Calculator computes the total and effective water volume of your tank, accounting for substrate displacement, and estimates total weight when filled to help you choose an appropriate stand and confirm floor load capacity.
How to use
Enter tank dimensions in cm, fill level, substrate depth, and substrate density. The calculator outputs total volume, effective water volume (excluding substrate space), and estimated full weight.
Example scenario
A 120x40x50 cm tank = 240 L total. With 5 cm gravel substrate and 90% fill: water volume รขโฐห 194 L. Water weight (salt) = 199 kg + 36 kg substrate + 120 kg glass estimate = ~355 kg total.
Pro tip
Floor load capacity in residential buildings is typically 200-300 kg/mรยฒ. A 240L reef tank can easily exceed 400 kg. Place large tanks along load-bearing walls or have a structural engineer assess. For saltwater tanks, water density is 1.025 kg/L vs 1.0 for fresh. Surface area (not volume) determines how many fish a tank can support รขโฌโ more surface area = more gas exchange.