"I Feel Free" first entered the UK Singles Chart on 17 December 1966 at #50, hit its highest position on 28 January 1967 at #11, and was last seen on 4 March 1967 at #49; the song spent a total of 12 weeks on the charts. The single reached #116 on the U.S. single charts.
Mark King of Level 42 covered the track for his 1984 debut solo album Influences & it was released as a single which failed to make the UK charts.
Marcella Detroit, aka Marcy Levy, covered "I Feel Free". She co-wrote "Lay Down Sally" and worked with Eric Clapton during his solo career in the 70s and 80s. This was released on her and Elton John's duet single, "Ain't Nothing Like The Real Thing," in 1994.
"I Feel Free" was the first song ever played on legendary rock station WBCN in Boston, Massachusetts at approximately 10 p.m on 15 March 1968. It was also the second to last song played on the night of 11 August 2009, leading up to the station's format and callsign change.
Cream's recording is featured in the 1983 period piecePurple Haze. It was also the opening song for the 2015 film "Joy" with Jennifer Lawrence and Robert De Niro.