How many gallons of water are in a pond 14x14 and 3ft deep?

Answer 1

Assuming you are talking about a roughly round pond of 14 feet diameter, and assuming the sides are straight down 3 ft, and assuming the floor of the pond is level so that it is 3 feet deep throughout (lots of assumptions here), the pond is a simple cylinder with radius of 7 ft and height of 3 ft. Its volume is therefore pi*r^2*h. So 3.14*49*3=461.58 cubic feet, or about 3453 gallons (one cubic foot = just under 7 1/2 gallons)