The knockout phase of the 2011–12 UEFA Champions League began on 14 February with the round of 16, and concluded on 19 May 2012 with the final at Allianz Arena in Munich, Germany.
Times up to 24 March 2012 (round of 16) are CET (UTC+01:00), thereafter (quarter-finals and beyond) times are CEST (UTC+02:00).
All draws held at UEFA headquarters in Nyon, Switzerland.
The knockout phase involves the sixteen teams who finished in the top two in each of their groups in the group stage.
Each tie in the knockout phase, apart from the final, is played over two legs, with each team playing one leg at home. The team that has the higher aggregate score over the two legs progresses to the next round. In the event that aggregate scores finish level, the away goals rule is applied, i.e. the team that scored more goals away from home over the two legs progresses. If away goals are also equal, then thirty minutes of extra time are played, divided into two fifteen-minutes halves. The away goals rule is again applied after extra time, i.e. if there are goals scored during extra time and the aggregate score is still level, the visiting team qualifies by virtue of more away goals scored. If no goals are scored during extra time, the tie is decided by penalty shootout. In the final, the tie is played as a single match. If scores are level at the end of normal time in the final, extra time is played, followed by penalties if scores remain tied.