How many tons of dirt to fill a 22000 gallon pool?

Answer 1

Dry sand has the density of about 100 pounds per cubic foot.

One US gallon = 0.133680556 cubic feet

so your pool is about 294.09 cubic feet.

You will need more than 29,000 pounds of sand (or 14.5 tons)

Answer

If you are truly filling in your pool, you should know that most places require a permit and that there are requirements that may be daunting in terms of cost and effort. Many places require removal of the Plumbing and of the pool itself.