Cansu Onder was born in 1999, in Ankara . She started her piano studies at the age of 6 with her father who is a composer.

In 2010 she won the entry examination of Hacettepe University  Ankara State Conservatory and she has continued her studies with Prof. Yeşim Alkaya Yener. In 2011 she joined "Pera International Piano Competition" and won the prize for "Best Turkish Composer Interpreter". In 2012, she gave a concert at the Italian Embassy. She took part in International Gümüşlük Music Festival's masterclass held in Bodrum in 2013.

She found a great chance to study with Misha Dacic, Yury Martinov, Mauricio Vallina, Aldo Ragone, Edna Golandsky, Pierre Réach and Gulsin Onay.

In 2014, she attended Wiener Musikseminar Master-Class held in Wienna and studied with Klaus Sticken. In the same year, she gave a recital in a convocation in Canadian Embassy to Turkey organized by Canadian Embassador. She currently studies with Prof. Yeşim Alkaya Yener.