Dimensions
Volume
Species
Stocking
Actual Water Volume
170.3 Liters
Add Fish to Your Stocking Plan
Stocking Summary: No fish added
Recommended Maximum: 0 inches of fish
How This Aquarium Calculator Works
This tool calculates actual water volume after accounting for substrate and decor displacement. It uses the standard "1 inch of fish per gallon" rule as a baseline, adjusted for species-specific needs. For example, goldfish produce more waste and require 2-3x more space.
- Rectangular: L × W × H / 231 (gallons)
- Cylindrical: π × (D/2)² × H / 231
- Half Cylinder: (π × (D/2)² × L) / 2 / 231
- Bow Front: Rectangular volume + 15%
Aquarium Stocking FAQ
It's a good starting point for small, slender fish. Larger fish, messy eaters (like goldfish), and territorial species require more space. Always research individual species.
Gravel, rocks, driftwood, and plants displace water. A 10-15% reduction is typical for moderately decorated tanks.
Standard practice is to measure the fish's standard length (excluding the tail fin) or total length. This calculator uses total length for simplicity.
US gallons are standard in the aquarium hobby, but liters are used internationally. The calculator displays both for convenience.
Experienced aquarists with over-filtration and frequent water changes can sometimes exceed the guideline. For beginners, staying under the limit is safest.
All calculations happen in your browser. No data is stored or transmitted.