How to Calculate Water Volume
Water volume is calculated differently based on the shape of the pond.
Oval Pond ------- Length x Width x Depth x 6.7 = Water Volume
Circle Pond ------ Length x Width x Depth x 5.9 = Water Volume
Rectangle Pond -- Length x Width x Depth x 7.5 = Water Volume
If the water depth is not the same for the entire pond, estimate the average depth of the water for the pond and use that number for the depth.
So if you are going to build an oval pond 16 feet long by 11 feet wide by 2 feet deep, the water volume would be:
11 x 16 x 2 x 6.7 = 2358 Gallons