The land area is 24.964 km2 (9.639 sq mi),[3] and its highest point is 754 m (2,474 ft) above sea level.

The main church is still in use and still houses the sacred image of the virgin Mary that is also considered a miracle worker.

Kalamos, once a remote island without electricity or a proper water system, now has all the conveniences of the mainland.

There is a public kindergarten, elementary and primary school in the main village of Kalamos where all of the children permanently resident on the island attend.

The island is easily reached from the mainland by a regular ferry service from the nearby port of Mytikas in Aetoloakarnania, year round.