A cricket over is a standard unit of bowling consisting of six valid deliveries bowled from one end of the pitch. The over is one of the fundamental organisational units of cricket and is used to structure bowling, scoring, field placement, statistics and match duration. Importantly, six deliveries being attempted does not always mean an over contains exactly six physical pitches of the ball.
Wides and no-balls are not valid deliveries for the purpose of completing the six-ball count, so an over can require seven or more physical deliveries before six valid balls have been completed. ICC playing conditions explicitly state that only valid balls count toward the six balls of an over and that the umpire calls Over after six valid balls when the ball is dead. This distinction is essential because newcomers often assume that every ball bowled automatically advances the over count.
The over begins with the bowler delivering from one end toward the striker at the opposite end. The six valid deliveries can produce runs, wickets, boundaries, dot balls, wides or other outcomes, but only valid deliveries advance the six-ball count. Once the sixth valid ball has been completed and the ball is dead, the umpire calls Over. The bowling side then changes its bowler and the next over is delivered from the opposite end.
The batter's position can change according to runs and the end from which the next bowler operates. The over therefore has a built-in alternation of bowling direction that affects the tactical relationship between bowler, batter and field. Bowlers normally alternate ends rather than delivering consecutive overs from the same end.
The distinction between a valid delivery and an extra delivery is particularly important. A no-ball gives the batting side an additional run under the relevant scoring rules and does not count as one of the six valid balls. A wide likewise produces an extra and does not count as one of the six valid balls. The bowler therefore has to deliver six valid balls rather than merely six physical deliveries.
A sequence containing a wide might require seven deliveries, while repeated wides or no-balls can make an over considerably longer. The exact consequences can include changes in the score, opportunities for the batters to run additional runs and restrictions on the bowler depending on the competition. The principle remains that the over count advances only when the required valid deliveries have been completed.
Overs are used to measure workload and scoring rate. A bowler's statistics can include the number of overs bowled, runs conceded and wickets taken, while a team's scoring rate is often expressed in runs per over. In limited-overs cricket, the number of overs remaining provides a direct measure of how many legal deliveries the batting team has left to use.
In T20 cricket, 20 overs represent a maximum of 120 valid deliveries for each side in an uninterrupted innings, although an innings can finish sooner. In ODI cricket, the normal maximum is 50 overs per side. These limits create strategic pressure because batters must balance immediate scoring against the risk of losing wickets, while captains must distribute overs among their bowlers. Overs therefore function as both a measurement system and a tactical resource.
The completion of an over causes an important fielding change because the next over is bowled from the opposite end. This means the fielding captain can reassess the situation and use a different bowler. Bowlers are often assigned different roles, such as opening with the new ball, bowling during the middle phase, or returning near the end of a limited-overs innings. The number of overs a particular bowler can deliver can be restricted by competition rules, especially in limited-overs cricket. A captain must therefore allocate bowling resources carefully. The concept of an over also affects batter strike because the batters can change ends through scoring and because the bowler's change of end changes which batter is facing from the relevant end.
An over can contain very different tactical sequences. Six dot balls produce no runs and can place pressure on the batter. Several boundaries can transform the score rapidly. A wicket can end a partnership and introduce a new batter. A combination of wides and no-balls can increase the score while prolonging the over and potentially disrupting the bowler's control. The bowler and batter are therefore constantly balancing risk and reward within each six-ball unit. Captains may change field positions between deliveries, and wicketkeepers and fielders communicate constantly about tactics. The over is consequently more than a bookkeeping unit; it is a short tactical contest within the larger innings.
The term over can sometimes be confused with a bowler's spell. An over consists of six valid deliveries, while a spell is an informal or statistical description of a period during which a particular bowler bowls consecutive or closely grouped overs. A bowler can bowl several overs in a spell, but the spell is not a formal replacement for the over in the Laws.
Similarly, an innings can contain many overs, while a match can contain hundreds of overs in long-form cricket. The scoreboard may show a notation such as 12.4 overs, which means twelve completed overs plus four valid balls of the next over, not twelve and four-tenths of an over. This notation is particularly important because cricket's over notation is not decimal arithmetic.
A cricket over is therefore precisely defined as a six-valid-ball unit, with the crucial qualification that wides, no-balls and other deliveries excluded by the applicable Laws do not count toward the six. The ICC's published over law explicitly states that only valid balls count and that the umpire calls Over after six valid balls when the ball is dead.
The over provides cricket with its basic rhythm, determines the alternation of bowling ends and helps measure bowling workloads and limited-overs resources. Understanding it also prevents a major scoring misconception: 10.3 overs does not mean ten decimal overs plus three-tenths. It means ten completed overs and three valid balls of the next over.
