Math question

Heretic · Post by **Heretic** » Sun May 30, 2010 8:18 pm

I have a pool I just bought and want to figure out how many gallons of water I have in it. I know the formula to find the volume is

Volume=πr²h

The pool is 16 by 3.5 feet which gives me

π*8²*3.5=703.8

A gallon of water is 0.13 cubic feet so I should have 5413.8461538461538461538461538462 gallons of water right or am I doing the math wrong?

Krom · Post by **Krom** » Sun May 30, 2010 8:40 pm

Your pool is a cylinder shape? (Volume calculations obviously change depending on the shape of the object in question)

If so then yes:
3.142(π) * 8(r) * 8(r) * 3.5(h) / 0.13(CuFt/gal) = 5413

Heretic · Post by **Heretic** » Sun May 30, 2010 8:44 pm

Yes it is cylindrical. Thanks been a long time since I did any math.

Krom · Post by **Krom** » Sun May 30, 2010 8:49 pm

Same here.

I make no promises but the formula for volume of a cylinder is a hard one to forget since it starts with the area of a circle.

AlphaDoG · Post by **AlphaDoG** » Sun May 30, 2010 9:01 pm

If your pool is like mine then you have to keep in mind that the water is not all the way to the top. Use a measure to get about 6-8 measurements of the depth of the water to arrive at an average depth which you would then use to calculate the actual volume of water in the pool.