The Celtics hit 11 three-pointers on their way to a 112-92 victory over the 76ers, which moved them into sole possession of the fifth seed in the Eastern Conference playoff race.
It was Boston's eighth straight game scoring at least 100 points.
Isaiah Thomas and Jae Crowder led all Boston scorers with 20 points, while Robert Covington of the 76ers scored a game-high 25 points.