Fish Tank Calculator
Calculate aquarium volume, fish stocking levels, heater size, filter capacity, and more for your fish tank.
Tank Dimensions
Tip: Measure inside dimensions of the tank, not outside dimensions, for accurate volume calculation.
Tank Volume
19.9 gal
75.5 liters
Fish Stocking
Small (1-2")
~19 fishNeon Tetras, Guppies
Medium (2-4")
~9 fishMollies, Platies
Large (4-6")
~5 fishAngelfish, Goldfish
X-Large (6-10")
~3 fishOscars, Plecos
* These are general guidelines. Actual stocking depends on fish species, filtration, and maintenance schedule.
Equipment Recommendations
Heater60-100W
Filter Flow Rate80 GPH
Lighting (planted)40-80W
Air Pump76 L/hr
Tank Details
Water Weight (filled)166.4 lbs (75.5 kg)
Surface Area2.00 sq ft
Care Tips
- • Change 10-25% of water weekly
- • Don't overstock - fish produce waste
- • Cycle your tank before adding fish
- • Test water parameters regularly
- • Surface area matters for oxygen exchange