Duckworth-Lewis method in cricket

The Duckworth-Lewis method in cricket

The Duckworth-Lewis method is a mathematical formula used to adjust target scores in cricket matches that are affected by rain or other interruptions. It provides a fair and adjusted target for the team batting second, taking into account the reduced overs and the resources available to both teams.

Here's how the Duckworth-Lewis method works:

1-   Initial Calculation: The first step is to calculate the resources used by the team batting first at the time of the interruption. This is done by considering the number of overs bowled and the number of wickets lost. The more overs bowled and the fewer wickets lost, the higher the resources used by the batting team.

2-    Par Score Calculation: Based on the resources used by the team batting first, a "par score" is calculated. The par score represents the number of runs the team batting first would be expected to score at the end of their allotted overs. It takes into account the average scoring rates in different stages of an innings. 

3-    Revised Target Calculation: Once the match is interrupted and overs are lost due to rain, the target for the team batting second is adjusted. The calculation is based on the par score, the number of overs remaining for the team batting second, and the resources they have available.

4-    Overs Reduction: The number of overs lost due to the interruption is deducted from the team batting second's original allocation. For example, if a match is reduced to 30 overs per side due to rain, the target will be adjusted based on the resources and the par score over 30 overs.

5-     Required Run Rate: The revised target provides the team batting second with a new required run rate to achieve victory. The required run rate is calculated based on the number of overs remaining and the adjusted target.


It's important to note that the Duckworth-Lewis method is a complex formula, and the specific calculations involved may vary slightly depending on the version of the method used (such as Duckworth-Lewis-Stern, or DLS). The International Cricket Council (ICC) periodically updates and refines the method to ensure it remains fair and accurate.


Cricket authorities, umpires, and match officials are responsible for implementing the Duckworth-Lewis method in rain-affected matches to determine revised targets and ensure a fair outcome despite interruptions.