what percentage of water is salt
What is the percentage of the Earths water is salt water? The total volume of water on Earth is estimated at 1.386 billion kmÂ³ (333 million cubic miles). About 97.5% of water on Earth is salt water and 2.5% fresh water. Of the 2â¦.5% fresh water, only 0.3% is in liquid form on the surface. A breakdown of the various forms of water is as follows, going from the largest to the smallest.