Net Run Rate (NRR) is a statistical measure used in cricket to compare the performance of teams when taking into account the total number of runs scored and conceded. It is used as a tiebreaker if teams are level on points in limited overs league competitions, including the Cricket World Cup. A teams NRR is calculated by deducting their average runs conceded per over from the average runs scored per over. Teams with a higher NRR have scored more runs than they have conceded, and vice versa.

To calculate NRR, the average runs per over scored by a team in each game are subtracted from the average runs per over scored against that team in each game. The average runs scored per over by a team are calculated by dividing the total runs scored in all the matches of the tournament with the total number of overs faced by the team. If a team is all out before it completes its overs, the against run rate is calculated using the full 50 overs.

It is important to note that NRR does not take into account the size of victory or defeat, as it ignores wickets lost. Therefore, ranking sides by NRR does not rank them by the size of victory.