Welcome to the Eratosthenes Experiment platform!

  • Register by completing the name, longitude and latitude of your school.
  • Come in contact with a registered school at the same longitude with you (this info will be provided to you by the organizing team)
  • Join efforts with the matching school and record your data
  • Calculate the circumference of the Earth
  • Submit your data and take part in our Eratosthenes photo contest

In addition you can



This year the experiment will take place on the 21st of March, on the autumnal equinox day. Thus, for your matchup –if no other schools can be found on the same longitude- you can consider the existence of a virtual school on the equator with experimental data 0 (shade of a one-meter stick measured at a certain time). This way you can also have an accurate outcome by conducting the experiment by yourself.

Join today and let your school be part of an exciting international activity!



The Eratosthenes Experiment 2016 is organised with support from the European Commission in the context of the Seventh Framework Programme (FP7). This Website reflects only the views of the Inspiring Science Education consortium members, the Commission cannot be held responsible for any use that may be made of the information contained herein.

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Contact Persons

Dr. Angelos Lazoudis
T. +30.210.8176795
E. angelos@ea.gr

Evgenia Kypriotis
T. +30.210.8176790