Take a look at the various pond calculators below. Use the volume calculator to calculate the volume of a pond in litres or gallons. The liner calculator will work out the size of liner required based on the ponds dimensions. If you need to know how much water should to be pumped by a pump then use the pump calculator. The cost calculator will tell you the electrical cost of running your pond monthly or annually, you can also use this calculator for individual components or to compare the cost of running different components.