Key takeaways
- An NHL game is three 20-minute periods of actual playing time, so the clock stops at every whistle and a game takes far longer than an hour of real time.
- Watch the two blue lines first: offside is judged at the attacking blue line, so when the whistle goes just as the attackers enter the zone, check whose skates crossed before the puck.
- After an icing, look at the bench of the team that iced the puck — it cannot change players, which is why icing hurts more than the whistle suggests.
- When the referee raises an arm without blowing the whistle, a penalty is coming against the team without the puck, and the other team may pull its goalie for an extra skater until the whistle.
- Regular-season ties go to a five-minute three-on-three overtime and then a shootout; playoff ties are played out in full 20-minute periods until someone scores.
Ice hockey is played six against six — five skaters and a goaltender per side — over three 20-minute periods, and the team with more goals wins. The clock runs only while the puck is in play. Almost every other rule a beginner meets does one of two jobs: it stops a team gaining ground unfairly (offside and icing), or it punishes an infraction by taking a player off the ice for a set time (penalties).
This guide follows a game in the order you will see it, using the National Hockey League's 2026-27 rulebook. Youth, college and international hockey publish their own rulebooks, and they differ in details, so treat the NHL version here as one complete example rather than the only one.
The game at a glance
| Question | NHL answer, 2026-27 | Where it comes from |
|---|---|---|
| Players on the ice | Six per team: five skaters and a goaltender | Rule 84.3 counts full strength as 5 on 5 skaters |
| Players dressed | 20: 18 skaters and two goaltenders | Rule 5.1 |
| Game length | Three 20-minute periods of actual play | Rule 77.1 |
| Intermissions | 18 minutes, or a length the league designates | Rule 77.2 |
| Tied after 60 minutes, regular season | Five-minute 3-on-3 overtime, then a shootout | Rule 84 |
| Tied after 60 minutes, playoffs | Further 20-minute periods until a goal | Rule 84.5 |
| Time-outs | One 30-second time-out per team | Rule 87.1 |
| Rink | 200 feet by 85 feet | Rule 1.2 |
Two consequences are worth knowing before you watch. Because periods are 20 minutes of playing time, a game lasts much longer than an hour on the wall clock. And because the regular season awards a point for losing in overtime or a shootout, a level score late in the third period is not like a level score in soccer: if it stays tied to the end of regulation, both teams bank a point before overtime starts.
The rink: three zones and the lines that matter
Picture the ice as five strips from end to end. The rulebook's diagram measures them as 11 feet from the end boards to the goal line, 64 feet from the goal line to the blue line, 50 feet of neutral zone, then 64 and 11 again. The centre red line splits the rink in half; the two blue lines split it into three zones.
The zones have names, and they flip depending on which team you are talking about. The zone containing your own goal is your defending zone, the middle is the neutral zone, and the far end is your attacking zone. When commentators say a team "can't get out of its own end", they mean it is stuck in its defending zone.
Two more markings matter early. The goal crease is the light-blue area in front of each net, where the goaltender is protected. The faceoff spots — nine of them — are where play restarts after every stoppage: one at centre ice, four in the neutral zone near the blue lines and two in each end.
Players, positions and changing on the fly
A team's five skaters are usually a centre, two wingers and two defencemen, with the goaltender behind them. The labels describe where a player starts and what he is responsible for first, not where he is allowed to go. Hockey positions explained goes through each role in detail.
What surprises most new viewers is the substitution. Players change during play: a skater heads for the bench, and his replacement may step on once the departing player is within five feet of the bench. Step on too early and the officials can call a bench minor penalty for too many men on the ice. Skaters rotate constantly, which is why teams dress several lines of forwards and pairs of defencemen.
Changes also happen at stoppages, with an order to them: the visiting team puts its players on the ice first, then the home team may change. That last look at the opponent's line-up is a built-in home advantage, because it lets the home coach pick the matchup.
What stops play
Offside
The attacking team's players may not go into the attacking zone ahead of the puck. The rulebook judges it by the skates, not the stick: a player is offside when both skates are completely over the attacking blue line before the puck has completely crossed it. If the defending team could simply carry the puck back out, the linesperson raises an arm and lets play continue — a delayed offside — and the attackers can clear the zone and come back in legally.
Icing
A team at equal or greater strength may not shoot the puck from its own half of the ice beyond the opponent's goal line untouched. The NHL decides the close calls with a race: the linesperson judges which player would touch the puck first, by the time the first player reaches the end-zone faceoff dots. The real punishment comes after the whistle. The team that iced the puck cannot change players before the faceoff, which goes back into its own end, and the other team chooses which end-zone dot to use. What is icing in hockey explains why that consequence matters so much.
Hand passes and high sticks
A player may stop or bat the puck with an open hand, but play stops if he directs it to a teammate outside his own defending zone. Batting the puck with a stick above shoulder height is also prohibited, and the whistle goes if the offending team then gets the puck.
Penalties, in one table
Penalties send a player to the penalty box and leave his team short-handed, which gives the opponent a power play.
| Penalty | Time off | Ends early if the other team scores? |
|---|---|---|
| Minor | 2 minutes | Yes |
| Double minor | 4 minutes | Only the half being served |
| Major | 5 minutes | No |
| Misconduct | 10 minutes, but a teammate may replace the player on the ice | Not applicable |
| Game misconduct | Removed for the rest of the game; a substitute may replace him | Not applicable |
| Match penalty | Removed for the rest of the game; his team is short-handed for five minutes | No |
Two signals help a beginner read the play. If the referee raises an arm without blowing the whistle, a penalty is coming against the team that does not have the puck — play continues until that team gains control of it. Watch the goalie of the other team: he may skate to his bench so an extra attacker can come on, because the whistle will go the moment the offending team has the puck. And when a player who is fouled from behind on a clear breakaway is denied a scoring chance, the referee can award a penalty shot: a one-on-one attempt against the goaltender from centre ice.
The power play itself, and why one extra skater changes so much, is covered in power play and penalty kill explained. The league's video rulebook shows most infractions on film, which is the quickest way to learn what a hook or a trip actually looks like.
What counts as a goal
The whole puck has to cross the goal line between the posts and under the crossbar. Goals that deflect in off an attacking player's skate or body count, but the rulebook disallows a goal that is kicked in with a distinct kicking motion, batted in with a stick above the crossbar, or scored while an attacker interferes with the goalie in his crease.
When the score is tied
In the regular season, a team that wins in regulation gets two points and the loser none. If the game is tied after 60 minutes, both teams get a point and play a five-minute, sudden-death overtime at three skaters a side. If nobody scores, a shootout decides the extra point: three shooters each, then one at a time until one team scores and the other does not.
The playoffs drop both the three-on-three and the shootout. After a 15-minute intermission, tied playoff games continue with ordinary 20-minute periods, teams changing ends each period, until someone scores.
Your first game: a five-point watching guide
- Find the blue lines. Offside is judged entirely at the attacking blue line, so if the whistle goes as the attackers cross it, check whether a skate went in ahead of the puck.
- Count the skaters after a penalty call. Five against four means a power play; five against three is the biggest advantage penalties can create, because the rules never leave a team with fewer than three skaters.
- Watch the bench after an icing. The tired players who iced the puck must stay out for the faceoff.
- Look at the goalie when the referee's arm goes up. If he is skating to the bench, a delayed penalty is on.
- Check the clock in the third period. A team trailing late may pull its goaltender for an extra skater, accepting the risk of an empty-net goal.
From watching to playing
Once the rules make sense on television, they make sense in a game. In Hockey Career Sim 2026 you play one forward, centre, defenceman or goalie through a career in a fictional league, choosing when to shoot, pass, defend, challenge the puck carrier or protect the net. If you prefer building a team to playing in it, 84-0 Hockey Draft & GM Manager asks you to fill the six positions described above and pick a coach — its player pool is drawn from real players' careers and rated by the game itself, and the hockey draft simulator guide explains how to approach it.
Neither game is affiliated with any league or team. The hockey hub collects the rest of our rules explainers, and all of the studio's sports titles are listed under sports career and GM games.
Good to know
Frequently asked questions
How long is an NHL hockey game?
How many periods are in a hockey game?
How big is an NHL rink?
How many players are on the ice?
What is the difference between offside and icing?
Sources
- National Hockey League Official Rules 2026-2027 (opens in a new tab)National Hockey League — accessed
- NHL Video Rulebook (opens in a new tab)NHL.com — accessed
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