How much salt is in the earth's oceans?

Answer 1

We have three ways to say this answer.

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1. The salt content of the earth's oceans is on the order of about 3.5%, or 35 parts per thousand (35 ppt). The volume of salt is something approaching 14,000,000 cubic kilometers. The number is so large, it is hard to comprehend. Is 1.4 x 1010 kilograms any more comprehensible? Again, those last two numbers are just a ball park upper limit. But gosh, they're big.
2. There are 11,000,000 cubic miles of salt in the ocean....3.5% of the mass of the entire ocean.
3. There are about 45 500 000 000 000 000 meters cube of salt in all of the ocean!!
4. if you lay out all the salt in the ocean it will wrap around the earth one time and be as tall as a 40 story building!

It is assumed that this is based on a volume of ocean water 1,300,000,000 km3

or 310,000,000 cubic miles.

Answer 2

Approximately 3.5% of the Earth's oceans are made up of salt, with the most common salt being sodium chloride. This concentration has remained relatively constant over millions of years.

Answer 3

about 120 million tons