A standard hockey game consists of three periods, each lasting 20 minutes, for a total of 60 minutes of actual playtime

. Between these periods, there are two intermissions, typically lasting around 15 to 18 minutes each, used for rest and ice cleaning

. Due to stoppages in play such as penalties, offsides, icing, TV commercial breaks, and other delays, the real-time length of each period is longer, often around 35 to 45 minutes

. Including intermissions and stoppages, a typical NHL hockey game lasts about 2.5 to 3 hours

. If the game is tied at the end of regulation, an overtime period is played. In the NHL regular season, this is a 5-minute sudden-death overtime, followed by a shootout if necessary, which can extend the total game length further

. In summary:

• Regulation playtime: 60 minutes (3 periods × 20 minutes)
• Intermissions: About 15-18 minutes each (two intermissions)
• Total real-time duration: Approximately 2.5 to 3 hours including stoppages and breaks
• Overtime (if needed): 5 minutes plus possible shootout, extending game length

This timing applies broadly to professional leagues like the NHL, AHL, and ECHL, with some variation in amateur leagues