Two halves
A standard match has two equal periods of 45 minutes. The referee keeps the official time, even when a stadium clock or broadcast clock is visible.
Football's standard match length is simple, but the real answer often depends on stoppage time, extra time, substitution procedure, competition rules, and whether the match is an adult professional game, youth match, friendly, or knockout tie.
For adult 11-a-side football, the default structure is two 45-minute halves with a half-time interval, plus time added for delays.
A standard match has two equal periods of 45 minutes. The referee keeps the official time, even when a stadium clock or broadcast clock is visible.
Half-time is normally no more than 15 minutes unless competition rules allow otherwise. The second half starts when the referee restarts play.
The referee adds time for substitutions, injuries, disciplinary delays, goal celebrations, VAR checks, time-wasting, and other significant interruptions.
If a knockout match must produce a winner and the score is level, competition rules may require extra time, kicks from the penalty mark, or another tie-breaking method. Extra time is usually two 15-minute periods, but the competition rules control the exact procedure.
The Laws set the framework, but the competition sets the number of substitutes, replacement opportunities, and whether special concussion substitutions are available. Many senior competitions allow five substitutions in a limited number of stoppage windows, while youth and friendly matches may allow more.