Pisces / Aquatics • 2+ Tools Available

Fish & Aquatics Calculators & Reference Tools

Aquarium volume (gallons & liters), net substrate displacement, and freshwater stocking bio-load capacity.

All Fish & Aquatics Calculators (1)

Select a verified tool to calculate nutritional requirements, body mass estimates, growth curves, or reproductive timelines.

Calculates net water capacity and recommended freshwater fish stocking limits from tank dimensions.

Rectangular tank volume = (L × W × H) ÷ 231. Net water capacity accounts for ~10-15% hardscape and substrate displacement.

How do you convert cubic inches to US gallons?

One US liquid gallon equals exactly 231 cubic inches.