Start with the calculator
Use the calculator first when you need a number, then use the guides to check assumptions, examples, and edge cases.
aquarium substrate calculator
Aquarium Substrate Calculator guides
Practical guides for common aquarium hobbyists planning a tank or rescape. questions, with links back to the calculator when a quick estimate helps.
Guide library
Planted tank depth Plan depth around root growth, layout shape, and the substrate type you intend to use. Substrate density The same volume can weigh differently depending on whether you use sand, gravel, or aqua soil. Tank size examples Use common footprints to sanity-check your calculator result before buying bags. Sand vs gravel The same tank footprint and depth can need different bag counts depending on substrate density. Sloped aquascapes Use an average depth for the calculator, then add allowance for steep slopes and hardscape.
Reference files
Use these when sharing the calculator in a resource page, newsletter, or planning checklist.
Substrate depth depends on livestock, plants, and tank design. Check species-specific requirements.