Køhler is a product of FC Nordsjælland, which he joined as a U12 player. He got his FC Nordsjælland debut on 1 May 2016. Køhler played the whole match in a 2–2 draw against Randers FC in the Danish Superliga, where he also scored a goal.[1]
Køhler got his contract extended in the summer 2016 until the summer 2018.[2] After 19 league games for FCN in the 2016/17 season, Køhler became an attractive player on the market. He had interest from FC Helsingør and Viborg FF.[3]
FC Helsingør
On 13 July 2017, newly promoted Danish Superliga-side FC Helsingør signed Køhler on a two-year contract.[4] Køhler played his first game for the club on 16 July 2017 against Hobro IK. Køhler left the club at the end of the 2018/19 season.[5]
After one year in Sweden, Køhler returned to Denmark and signed a one-year deal with newly relegated Danish 1st Division club Esbjerg fB.[7] On 26 March 2021, three months before time, Køhler's contract was terminated by mutual consent after only playing six games for the club.[8]
Valur
On 26 March 2021, the same day he terminated his contract with Esbjerg, Køhler signed with Icelandic champions Valur.[9] On 6 October 2021 it was confirmed, that Køhler had left the club at the end of his contract, as the club had to save money due to the lack of qualification to European football.[10]
ÍA Akranes
On 18 January 2022, Køhler signed a two-year deal with Icelandic club ÍA Akranes.[11]
Køhler made six appearances for Fremad Amager before leaving the club when his contract expired in June 2024.[13]
Later career
On August 29, 2024, it was confirmed that 28-year-old Køhler would end his career as a footballer and instead continue as Team Manager for the Danish U-16 and U-17 national teams, where he would be responsible for budgets related to travel, hotels and basically all non-pitch related matches.[14]
Besides that, Køhler would also spend time on his two businesses: one, together with his former teammate Emiliano Marcondes, where they run Visionary workshops for young athletes on building an identity that is not only based on performance on the pitch. And the other, also with a former teammate, Martin Lauritsen, where they had a business together producing alarm clocks.[14]