What is the water volume in a cistern 6' wide x 6' long x 6' deep?
First you have to calculate the volume of the cistern (L x W x
D) and then multiply by the number of gallons per cubic foot
(7.481). Assuming the dimensions given are inside dimensions: 6 x 6
x 6 = 216 x 7.481 = 1615.896 gallons.