I looked it up on Google and it says: "The total water content is about 331 million cubic miles" actually i got that from somewhere on here and i know that doesn't help you much but it gives you a good start.....i guess xD
332,500,000 cubic miles (mi3) - or in metric units - 1,386,000,000 cubic kilometers (km3)
0.03%
it is earth's water supply
Hydrological (water) cycle.
just about 95% of the Earth is water
Hydrosphere
The total amount of Earths total water supply that is usable fresh water is less then two percent. The rest is salt water or pond water.
water cycle
geosphere
geosphere
Earth is the only planet with a bountiful supply of water.
We are using our fresh water faster than the ground supply is replenished. Also, earth's water is threatened by pollution.
About 2.59% of Earth's total water supplies is drinkable water