How much of a iceberg is under the water?

Question

How much of a iceberg is under the water?

Answer 1

All of it that is not above the water.

(Were you looking for a trick answer?)

Answer 2

Between 85 and 90%.  Check out the website for more info.

Answer 3

Usually only 1/5 of the icerberg mass is above the waterline.

So, in answer to your question, 4/5 of the overall mass of an iceberg on average is beneath the water surface according to this site below.

Answer 4

90%

Answer 5

All of it but the tip.  Shape has a lot to do with the answer but I'm going with 87 1/2 percent is underwater.