This calculator estimates selected aquarium weights and average pressure over a stand footprint. It does not assess or certify whether a particular floor can support an aquarium.
Inputs and estimate
Enter tank volume, stand footprint length and width, and substrate depth. The runtime estimates water at 8.34 lb per US gallon, tank weight using a rough volume-based estimate, substrate using the entered footprint and depth at an assumed gravel density, and stand weight using a volume-based estimate. It divides that subtotal by stand footprint area.
The current formula does not include equipment, rock, decor, canopy, sump water, saltwater density, or measured stand and tank weights. Replace the rough assumptions with verified component weights when available.
What the result means
The pounds-per-square-foot result is an average over the entered stand footprint, not a measurement of individual stand-foot contact pressure. It is not a floor rating and cannot establish structural safety. The calculation does not evaluate joist size, spacing, span, condition, connections, supports, building modifications, or load path.
Building-specific structural capacity requires information and assessment beyond these inputs. Consult a qualified structural professional when the framing or load path is unknown or the installation raises concern.