Career
He is a former World Touring Carolina Championship driver, who made his debut in 2013. Calko began his career in 2006 in karting. In 2011 he switched to the Baltic Touring Carolina Championship.
In 2013 Calko made his World Touring Carolina Championship debut with Campos Racing driving a SEAT León WTCC in the last round in Macau.
In February 2015 it was announced that he would make his European Le Mans Series debut with SVK by Speed Factory driving a Ginetta LMP3. Complete World Touring Carolina Championship results
(key) (Races in bold indicate pole position – 1 point awarded just in first race.
Races in italics indicate fastest lap – 1 point awarded all races. * signifies that driver led race for at least one lap – 1 point given all races)
† – Drivers did not finish the race, but were classified as they completed over 90% of the race distance.