June 8, 2026 Aquarium Gravel Calculator Unit System: Metric (cm, kg) Imperial (in, lbs) Tank Shape Rectangular Corner (right‑angle) Hexagonal (regular) Cylindrical Substrate Depth (cm) Quick set: ~1″ ~2″ ~3″ Substrate / Top Layer Standard Gravel Fine Sand Aquasoil Crushed Coral River Rock Custom Density… Custom Density (kg/L) Bag Size 5 kg (11 lbs) 10 kg (22 lbs) 20 kg (44 lbs) 20 lbs (9.07 kg) 10 lbs (4.54 kg) Custom Bag… Custom Bag (kg) Advanced Options Sloped Substrate Front depth Back depth Two‑Layer Substrate Base layer depth Base layer substrate Aquasoil Gravel Sand Custom Show Water Displacement Tank Height (cm) Quick Tank Presets 5 gal 10 gal 20 gal Long 29 gal 40 gal Breeder 55 gal 75 gal 125 gal Calculate Gravel Reset Substrate Depth Visualization 01″3″5″+ Copy Results Download PDF