Calculate the Net Run Rate for cricket teams
Net Run Rate Defined
The Net Run Rate is a tie-breaking method for multiple-team, limited-overs cricket tournaments. A cricket team's Net Run Rate (NRR) can be thought of as the average runs per over scored against a team throughout the competition subtracted from the average runs per over scored by that team throughout the competition.
The NRR is critical information on the points table, since it is usually the second decider for a tie-breaker (after head-to-head results) in a round-robin format.
The information that is pertinent to a Net Run Rate calculation is contained in the For and Against columns. The Net Run Rate formula in cricket is simple, but requires due care and precision in gathering relevant information and calculating the component run rates.
Step 1: Determine the total runs scored by the team
Exclude totals in games that are abandoned without a result (No Result). For instance, if a team scores 270, 200 and 158 in three one-day matches, the total runs For is:
270 + 200 + 158 = 628
Step 2: Determine the total overs used by the team
To do this properly, you must be aware of certain rules and practices:
- 2.5 overs denotes two overs and four balls, not two and a half overs
- If a team is dismissed before the full allotment of overs, they have used the full allotment of overs for purposes of NRR
- Only allotted overs are assessed in cases of teams being dismissed
With these guidelines in mind, add the number of overs that the team faced. For example, a team was dismissed in 32 overs (out of 50 allotted overs); batted for 50 overs in the following game; batted for 42.4 overs (successfully chasing a target); and successfully chased another target in 38.2 overs.
According to guidelines, the team used 50 + 50 + 42.4 + 38.2 overs throughout the competition.
Step 3: Determine the Run Rate FOR
This is the Total Runs For (Step 1)/ Total overs For (Step 2)
Using RCB from Table 1, the information is as follows:
Total runs = 1962
Total overs = 237
The Team's Run Rate For is 1962/ 237
RCB's Run Rate For = 8.2785
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Step 4: Calculate the runs Against
Just as in Step 1, except that it you are using the runs scored against the team.
For example, if the opponents scored 180/3, 291 all out and 115/7, then the total runs against is (180 + 291 + 115 = 586).
Step 5: Calculate the total overs Against
Just as Step 2, except that it would be the overs the team's opponents faced against it.
Step 6: Determine the run rate Against
Total runs against/ Total overs against.
Using the example from RCB in Table 1:
Total runs against: 2000
Total overs against: 251.3
Run Rate = 2000/ 251.3 = (2000 runs/ 1509) balls x 6 = 7.9523
Step 7: Calculate the Net Run Rate (NRR)
The Net Run Rate is the average run rate FOR minus the average run rate AGAINST.
Using Royal Challengers Bangalore (RCB) from Table 1 as an example:
NRR = Average runs scored per over - Average runs against per over
= 8.2785 - 7.9523
NRR = 0.326, as per table.
Now, master the Duckworth-Lewis Method
Understanding the Net Run Rate can make you an informed cricket fan, but knowing the famous (or infamous) Duckworth-Lewis method for interrupted matches would be phenomenal. This book is a comprehensive guide written by the men behind the method.
Important points to note
- Where the Duckworth/Lewis is used, the runs scored for/against may be affected
- Discount no results (NR) innings from your calculations. The NRR is only calculated from games that have a result.
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