How many gallons of water are there on Earth?

How many gallons of fresh water exist on planet Earth?

  • Do not use the Internet or open books. Instead, try to guess. Please explain your answer. Consider all the places on and under the Earth that contain water. Use the definition of fresh water as water containing <.05 % dissolved salts.

  • Answer:

    Out of all the water on Earth, only 2.75 percent is fresh water... The volume of all water is about 332.5 million cubic miles... A cubic mile of water equals more than 1.1 trillion gallons... All water is 365.8 trillion million gallons... Therefore fresh water is 10.0 trillion million gallons...

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Other answers

It is believed that there are about 9.276×10^18 gallons of fresh water on earth.

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