Water Tank Size Calculator
Find the water tank capacity a household needs and the diameter of a round tank for a chosen height, free online.
About this calculator
Daily demand is about 135 litres per person (Indian standard for domestic use; 200+ in some countries). Tank capacity = people ร litres per person ร days of storage, plus a reserve. For a cylindrical tank of height h, diameter = โ(4V รท ฯh).