Need some Math help with bottles...

[chrisf8657]

I just found some old bottles at the bottom of my junk box.
I figured this would be a good time to ask -

How would I calculate the mL of the bottle using height and circumference?

 

[RMarcusY]

Height X pie = something to eat while you "fill the bottles with water and measure the water you pour out into a know beaker, or other container that shows amount in ml"

 

[Zanaspus]

(pi) x radius squared x height