The Full Form of NRR is‍ Net Run Rate.

Net Run Rate (NRR) has become the preferred method of breaking ties in multi-team one-day international tournaments. It is often misunderstood, but really quite simple to understand.

A team’s net run rate is calculated by deducting from the average runs per over scored by that team throughout the competition, the average runs per over scored against that team throughout the competition.

In the event of a team being all out in less than its full quota of overs, the calculation of its net run rate shall be based on the full quota of overs to which it would have been entitled and not on the number of overs in which the team was dismissed.

Only those matches where results are achieved will count for the purpose of net run rate calculations. Where a match is abandoned, but a result is achieved under Duckworth/Lewis, for net run rate purposes Team 1 will be accredited with Team 2’s Par Score on abandonment off the same number of overs faced by Team 2. Where a match is concluded but with Duckworth/Lewis having been applied at an earlier point in the match, Team 1 will be accredited with 1 run less than the final Target Score for Team 2 off the total number of overs allocated to Team 2 to reach the target.