What is the drag coefficient of a ping pong ball?

Answer 1

For a 38mm diameter ball (not regulation, but common):

4/3*pi*r^3 = 9145.33 cu mm = 9.145 cc (cubic centimeters).

1 cc water = 1 mL water = 1 gram water = 0.035274 AVDP Oz = 0.0022046 AVDP Pound

SO:

Your 38mm ping pong ball displaces 9.145 mL Water (or 9.145 gram Water, or 0.323 AVDP oz, or 0.02016 AVDP Pound.)

It would take roughly 50 of these balls to displace one pound of water.

Answer 2

A Table Tennis ball weighs 2.7g.

Answer 3

O.5