# How many gallons are in an 18 foot X 3.5 foot pool?

**Cannot be answered with only these measurements.** You need
to specify what shape the pool is. Also, for a rectangular pool,
the length, width and depth are needed. For a round pool, the
diameter and depth are needed.

### How many gallons does an 18 foot above ground pool hold?

In order to calculate the volume of the pool, the depth must be known. Then the volume must be multiplied by the number of gallons of water per cubic foot. The surface area of an 18-ft-diameter pool is 254.47 sq ft. Multiply that number by the depth (in ft) to find the volume. Then multiply the volume by 7.481 (gallons per cu ft) to find how many gallons the pool will hold. Example, 18-ft-dia pool…

### How many gallons are in an 18-foot vinyl pool?

30536.28 gallons By figuring your pool's depth, you can then determine how much water your pool holds. This is how you would find the average depth: shallow end depth + deep end depth divided by 2. Rectangular pool: Lenght x Width x average depth x 7.5 total gallons. Oval pool: full width x full length x average depths x 5.9 total gallons. Sloping sides: If your pool has sloping sides, multiply the final figure by…

### How many gallons of water in a round pool 18 foot across 4 feet deep?

This pool makes a cylinder. The formula for the volume of a cylinder is: pi X radius2 X height. The radius is one half of the diameter so, in this case, radius = 9 feet (18/2). The height is the depth of the pool, in this case, 4 feet. So, the volume of this cylinder is: 3.14 (pi) X 92 X 4 = 1017.36 cubic feet They want the answer in gallons. One cubic foot…

### How many gallons of water fill an 18 x 36 swimming pool?

mine is the same size as long as its 3 feet deep to 8 feet deep then the exactly 26730 gallons i figured that out today because we over shocked our pool by 4 times Assuming you are referring to an 18 foot by 3 foot (36 inches) circular pool, the formula would be PIE x radius x radius x depth = cubic feet, then cubic feet x gallons per cubic foot. So here is…