How To Determine - Cylindrical Tank Volume Using the diameter of the tank, multiply the diameter by the diameter (D x D), and then multiply by .7854. This will equal the square area of a circle.
Area of a cylinder: Diameter x Diameter x .7854 (D x D x .7854) Taking the length of the tank multiply the square area of a tank, by the length dimension. This gives you the volume of the tank. Volume of a cylinder: Height x Square area of cylinder (height also = length or depth) To determine the volume in gallons of the tank, divide the volume of a tank by 231. NOTE: There are 231 Cubic Inches in 1 gallon of water Cylindrical Tank Formula: Diameter x Diameter x .7854 x Length, 231 (D x D x .7854 x L, 231) NOTE: When a circles diameter is equal size of a square, the area of a circle consumes .7854 or 78-1/2% of a square. The remaining 21-1/2% is not used in cylindrical calculations. (an 1-foot diameter circle into an 1-foot square) One cylindrical tank 7 x 72, for each wing will hold a total of 24 gallons. 7" x 7" x .7854 x 72" / 231 = 12 gallons 11" x 11" x .7854 x 12" / 231 = 5 gallons Larry A Capps KR Newsletter Naperville, IL "I wonder how much deeper the ocean would be without sponges." -----Original Message----- a 6" tube x 8" long is 1 gal ( 231 sq. in /gal ),