Roughly what share of all water on Earth is stored in the oceans?

1. Of about 1,386,000,000 cubic km of water, about 1,338,000,000 cubic km is in the oceans. 2. That is nearly all of it, about 97 percent. 3. Half or a quarter would leave far too much water elsewhere, and 78 percent is the share of rain falling over the ocean. _Source: Wikipedia, Water cycle, Water in storage_