How many liters of water are in a 18 foot round pool?

Answer 1

There are two answers.

1. You don't provide enough information. A liter is a volume or 3-dimensional measure length width, depth). You only provide the capability to calculate a 2-dimensions area (length and width).

2. Assuming that the 18 foot dimension is a diameter, the radius is then 9 feet. Using that and the formula to calculate the area of a circle, the number of square feet contained in an 18 foot diameter circle is approximately 254.34 Square feet.

If you have an AVERAGE water depth of 3 feet in the pool, the total cubic feet of water is 763 cubic feet which converts to approximately 16, 265 liters of water.

If the average water depth is 3 1/2 feet, the number of liters jumps to 18,976.

If the average water depth is 4 feet, the number of liters jumps to 21, 687.

That should give you enough information to estimate what you need.