Aquarium Water Volume Calculator

Gross volume: length × width × height ÷ 231 (cubic inches per gallon)
Substrate displacement: length × width × substrate depth ÷ 231 × 0.6 (substrate is 60% solid, 40% void filled with water)
Live rock: ~0.5 gal/lb. Highly variable (porous rock displaces less than dense rock)
Sump: add directly to total system water

Gross tank volume	0 gal
Substrate displacement	0 gal
Live rock displacement	0 gal
Tank water (after displacement)	0 gal
Sump volume	0 gal
Total system water	0 gal

Aquarium water volume.