 Quandaries and Queries HAVE A AREA WHERE I HAD A 18 FOOT ROUND POOL. THE DEEPEST PART IT WAS IN THE GROUND WAS AROUND 7 INCHES TAPERING DOWN TO AROUND 4 TO FIVE INCHES AND A LITTLE OF THE ONE SIDE ALMOST AT GROUND LEVEL...HOW MANY YARDS OF DIRT WOULD I NEED TO FILL IT IN????  IS THERE A FORMULA FOR THAT.......COULD YOU FIGURE THAT FOR ME? JERRY Hi Jerry, From the information you have sent I can only give you an estimate of the volume. I am assuming that by "18 foot round pool" you mean 18 feet in diameter. That gives a radius of 9 feet which is 3 yards. If the pool were all the same depth then the volume would be pi radius2 depth (If you don't have a calculator with a pi button use 3.1416 for pi.) If the depth were 7 inches, which is 7/36 yards, the volume would be pi 32 7/36 =  5.5 cubic yards. If the depth were 4 inches, which is 4/36 yards, the volume would be pi 32 4/36 =  3.1 cubic yards. The best I can suggest is that you look at the hole, estimate how deep it would be if moved the dirt to make it all the same depth, and then use that depth to calculate the volume as I did above. Penny Go to Math Central