Question: how to calculate pond water volume in litres?
Answer: If you pond is 2.5m long and 1.2m wide and about 40cm deep, you would then do the following using the formula (W x L x average depth x 1000) 1.2 x 2.5 x 0.4 x 1000 = 1200 litres. When calculating the volume of a cylinder, R refers to the radius.