Pool, Pond & Aquarium calculators
Pool volume, pool salt and pool chemical, aquarium, substrate, pond, well volume and household water usage calculators.
- Aquarium CalculatorWork out how many gallons your fish tank holds, for rectangle, bow front, cylinder or hexagon tanks, what the water weighs, and the heater size it needs.
- Aquarium Substrate CalculatorFind how many pounds of aquarium gravel, sand, crushed coral or planted-tank substrate to buy for your tank and bed depth, and how many bags that is.
- Pond Liner CalculatorWork out the pond liner size you need from the pond's length, width and deepest point, with an edge to bury all round and underlayment to match.
- Pond Volume CalculatorFind how many gallons your garden pond holds, for any shape, then the pump flow it needs, with a waterfall, and how many fish it can keep.
- Pool Chemical CalculatorWork out how much liquid chlorine, cal hypo, baking soda, muriatic acid, calcium chloride or stabilizer to add to your pool, from state dosage charts.
- Pool Salt CalculatorFind how many pounds and bags of salt your saltwater pool needs to reach the level your chlorine generator's maker recommends, or how much to drain.
- Pool Volume CalculatorFind the water volume of a rectangular, round or oval pool in gallons, liters and cubic feet, using the average depth of a sloped floor.
- Water Usage CalculatorEstimate your household's water use a day, month and year by use, from EPA's survey of US homes, with efficient fixtures and lawn watering.
- Well Volume CalculatorFind how many gallons of water are in your well from its casing size and depth, and how much bleach to shock chlorinate it, from state extension guides.