Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Volume of Earth's Water
Name: Robert K.
Status: Other
Age: 40s
Location: N/A
Country: N/A
Date: February 15, 2004

If you took all of the oceans,lakes and rivers from Earth and made a big fat drop of water with it in space, how big would it be? What would be its mass and "surface" gravity?

You can find all the data you need to do the calculation. Basically, what you need to know is the total volume of water on planet Earth. The U.S. Geological Survey web page below gives you all the "stuff" you need.

Vince Calder


The Earth has approximately 1.3 billion cubic kilometers of water, meaning that a sphere with all of that water in it would have a diameter of 1354 kilometers (841 miles).

For comparison, the diameter of the Moon is 3,476 kilometers.

David R. Cook
Atmospheric Research Section
Environmental Research Division
Argonne National Laboratory

Click here to return to the Environmental and Earth Science Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory