Pools, Spas & Aquariums calculators
7 free toolsPool volume, chemical dosing, heating, pump and fill-time calculators, plus aquarium volume — accurate in gallons or litres.
Pool Chemical CalculatorType in your pool test results and targets to get a step-by-step dosing plan: how much chlorine, muriatic acid or soda ash, baking soda, staPools, Spas & AquariumsAquarium Volume CalculatorMeasure your fish tank and get its volume in US gallons, litres and UK gallons. Works for rectangular, cylinder, half-cylinder, hexagon, bowPools, Spas & AquariumsHot Tub Volume CalculatorFind the water volume of a hot tub, spa or plunge tub. Choose square, round or octagon, enter the inside size and water depth, allow for thePools, Spas & AquariumsPool Fill Time CalculatorFind out how long it will take to fill your pool, top it up or fill a hot tub. Choose a hose size, measure the real flow with a bucket, or ePools, Spas & AquariumsPool Heater CalculatorFind out how long your pool heater needs to warm the water and how much it costs. Enter the pool volume, the temperature rise, the heater tyPools, Spas & AquariumsPool Pump CalculatorFind the flow rate your pool pump needs to filter the whole pool in your chosen turnover time, check whether your current pump keeps up, andPools, Spas & Aquariums