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The equatorial circumference of Earth is 40,075 kilometers (24,901 miles).

en.wikipedia.org/wiki/Eratosthenes

Eratosthenes of Cyrene was a Greek mathematician, geographer, poet, astronomer, and music .... Eratosthenes calculated the circumference of the Earth without leaving Egypt. He knew that at local noon on the summer solstice in Syene ...

en.wikipedia.org/wiki/Earth

Earth is the third planet from the Sun and the only object in the Universe known to harbor life. ... Circumference. 40075.017 km equatorial (24901.461 mi) ...

www.khanacademy.org/partner-content/nasa/measuringuniverse/measure-the-solarsystem/v/eratosthenes_measures_earth

If he carried out the calculation with the Greek stade, he would have miscalculate the circumference of the Earth by about 16%. However, he would have been ...

www.todayifoundout.com/index.php/2014/01/amazing-eratosthenes

Jan 1, 2014 ... Today I found out about a man who fairly accurately estimated the circumference of the Earth well over 2,000 years ago: Eratosthenes of ...

www.sciencebuddies.org/science-fair-projects/project-ideas/Astro_p018/astronomy/calculating-the-circumference-of-the-earth

How big a ruler would you need to measure the circumference of the Earth? Did you know that you can do it with a yardstick? (And you won't have to travel all ...

www.thoughtco.com/essential-facts-about-the-planet-earth-1435092

Apr 24, 2017 ... Here you will find a listing of essential facts about planet Earth, the home to all of humanity. The circumference of the Earth at the equator: ...

www.universetoday.com/26461/circumference-of-the-earth

Mar 2, 2009 ... The circumference of the Earth in kilometers is 40,075 km, and the circumference of the Earth in miles is 24,901. In other words, if you could ...

www.space.com/17638-how-big-is-earth.html

Sep 17, 2012 ... Earth is the fifth largest planet in the solar system and the densest. Diameter of Earth, circumference, mass & volume explained.

solarsystem.nasa.gov/planets/earth/facts

... x 103 km Equatorial Circumference Metric: 40030.2 km English: 24873.6 miles ... Rotation Period 0.99726968 Earth Days 23.934 Hours Surface Temperature ...