How much sand is needed for above ground filter 27 ft round pool?

To calculate the amount of sand needed for an above-ground filter 27 ft round pool, follow these steps:

1. Determine the pool's volume. The formula for the volume of a cylinder is:

```

V = πr²h

```

Where:

- V is the volume in cubic feet

- π is a constant approximately equal to 3.14

- r is the radius of the pool in feet

- h is the height of the pool in feet

In this case, the radius of a 27 ft round pool is 13.5 ft. If the pool is 5 ft high, the volume is:

```

V = 3.14 * 13.5² * 5

= 2894.25 cubic feet

```

2. Determine the sand requirement per square foot of pool surface area. The general recommendation for above-ground pools is 1 pound of sand per square foot of pool surface area.

3. Calculate the pool surface area. The formula for the surface area of a circle is:

```

A = πr²

```

Where:

- A is the surface area in square feet

- π is a constant approximately equal to 3.14

- r is the radius of the pool in feet

In this case, the radius of a 27 ft round pool is 13.5 ft. The surface area is:

```

A = 3.14 * 13.5²

= 572.55 square feet

```

4. Determine the total sand required. Multiply the sand requirement per square foot of pool surface area by the pool's surface area.

```

Sand required = 1 pound per square foot * 572.55 square feet

= 572.55 pounds

```

Therefore, approximately 572.55 pounds of sand are needed for an above-ground filter 27 ft round pool.