Nikos Drelas was born in Athens.
From 1977 up to 1982 he lived in Thessalonica, Greece studying Mathematics at the local University and Harmony with Yiannis Mantakas at the Neo Odeio Conservatory.
From 1982 up to 1984 he took classes in Counterpoint and Composition from Michalis Travlos at the Nikos Skalkotas Conservatory in Athens.
In 1984 he commenced his studies at the department of Composition of «Hochschule der Künste - Berlin» under Witold Szalonek while also attending seminars in Conducting from Friedrich Goldmann.
In 1988 he participated in Gaudeamus International Music Days in Amsterdam with his work Strophes for mixed choir as well as in Conferenza Musicale Mediterranea - Palermo with his worjk Thitia.
In 1989, Strophes is selected to represent Greece at the Music Days of ISCM.
In 1989 he was granted a studentship by the Mousigetis society, whereas in 1990 the Department of Culture of the then West Berlin granted him a scholarship in the form of a request for a composition.
He lives in Athens since 1991.