Regulation hockey games are played in three 20‑minute periods of stop-time game play in most professional leagues, including the NHL.

Quick Scoop: Basic Timing

  • Number of periods: 3 periods per game.
  • Length of each period: 20 minutes of game clock time.
  • Total regulation game time: 60 minutes of game clock (not counting stoppages, intermissions, or overtime).

Because the clock stops on whistles (offsides, icing, penalties, puck out of play, etc.), a full pro game usually takes about 2.5 hours in real life , including breaks.

Intermissions and Real-Time Length

  • Intermissions: 2 breaks between periods.
  • Typical length: About 15–18 minutes each in pro leagues; the NHL commonly uses 18-minute intermissions.
  • With intermissions plus stoppages, TV timeouts, and possible overtime, that’s why you’re often watching for around 2.5 hours from puck drop to final horn.

Think of it like this: hockey promises 60 minutes of intense action, but you’re blocking off an evening to see how it all plays out.

Overtime Note (When Tied)

If the game is tied after the three 20‑minute periods, leagues add overtime , which has its own timing rules (for example, in many pro leagues: 5‑minute sudden-death OT in the regular season, then longer 20‑minute periods in playoffs).

TL;DR: Regulation hockey periods are three periods of 20 minutes each , with 15–18 minute intermissions, making the full viewing experience about 2.5 hours in real time.

Information gathered from public forums or data available on the internet and portrayed here.