The actor, who celebrated his 50th birthday last November, spoke to director Paul Thomas Anderson for Esquire's Mavericks of Hollywood issue, which was released Wednesday.
The Titanic actor responded with, "32." He also said that when he turned 50, he really felt as though he turned "emotionally 35."
Anderson, who directed DiCaprio in the upcoming film One Battle After Another, asked if hitting the milestone age of 50 made the actor reflect on his life.