Duckworth-Lewis-Stern Calculator
Professional cricket match score calculations and target predictions
using the official DLS method for rain-affected matches
Match Parameters
Team 1 Innings
Team 2 Innings
Results
Enter match parameters and click calculate to see DLS results
Official Duckworth-Lewis Method
The D/L method works using the notion that teams have two resources with which to make as many runs as they can - the number of overs they have still to receive and the number of wickets they have in hand.
Basis of the Method:
- Teams have TWO resources: overs remaining and wickets in hand
- A single table gives the percentage of combined resources remaining
- When a match is shortened, resources are depleted differently for each team
- The revised target is set according to the relative run-scoring resources available
Procedure for Setting Revised Target:
- Note the resource percentage each team had available at the start of their innings
- Calculate the resource percentage lost by each interruption using the table
- Calculate the total resource percentage available for each team
- If Team 2 has LESS resources: Scale down Team 1's score by the resource ratio
- If Team 2 has MORE resources: Add extra runs based on the excess resource percentage
Team 2 Has Less Resources
Target = (Team 1 Score × Resource Ratio) + 1
Example: If Team 2 has 72.5% resources vs Team 1's 100%, and Team 1 scored 250, then Target = (250 × 0.725) + 1 = 182 runs
Team 2 Has More Resources
Extra Runs = (Excess Resource % ÷ 100) × 225
Example: If Team 2 has 68.7% resources vs Team 1's 38.2%, excess = 30.5%. Extra runs = (30.5 ÷ 100) × 225 = 69 runs added to Team 1's score
Official D/L Rules & Regulations
Reading the Resource Table:
- The table applies to all match lengths from 60 overs downwards
- Resources are expressed as percentages of a 50-over innings (100%)
- 60-over innings start with 107.1% resources
- 40-over innings start with 90.3% resources
- Use overs left and wickets lost to read the resource percentage
When DLS is Applied:
- Rain interruptions during an innings
- Reduced overs due to weather conditions
- Late start affecting total overs
- Any interruption causing loss of playing time
- Multiple interruptions can be handled by the method
Minimum Overs Required:
- ODI: Minimum 20 overs per side
- T20: Minimum 5 overs per side
- Match abandoned if minimum overs cannot be bowled
Key Principles:
- The method considers BOTH overs remaining AND wickets in hand as combined resources
- Different stages of interruption affect teams differently - D/L accounts for this
- If Team 1's innings is curtailed, Team 2 may get a higher target (they know the reduced overs in advance)
- The method ensures fairness regardless of when the interruption occurs
Official D/L Examples
Example 1: Premature Curtailment of Team 2's Innings
Scenario: Team 1 scored 250 runs in 50 overs. Team 2 scored 199/5 in 40 overs when rain stopped play permanently.
Calculation:
- Team 1 resource: 100% (full 50 overs)
- Team 2 at stoppage: 10 overs left, 5 wickets down = 27.5% resource remaining
- Team 2 resource used: 100% - 27.5% = 72.5%
- Target: 250 × (72.5/100) = 181.25 = 182 to win
Result: Team 2 wins by 18 runs (199 > 181)
Example 2: Interruption to Team 2's Innings
Scenario: Team 1 scored 200 in 40 overs. Team 2 scored 140/5 in 30 overs, then 5 overs were lost.
Calculation:
- Team 1 resource: 90.3% (40-over innings)
- Team 2 at interruption: 10 overs left, 5 wickets down = 27.5%
- After losing 5 overs: 5 overs left, 5 wickets down = 16.4%
- Resource lost: 27.5% - 16.4% = 11.1%
- Team 2 resource: 90.3% - 11.1% = 79.2%
- Target: 200 × (79.2/90.3) = 175.42 = 176 to win
Result: Team 2 needs 36 runs from 5 overs with 5 wickets in hand
Example 3: Interruption to Team 1's Innings
Scenario: Team 1 scored 100/2 in 25 overs when rain ended their innings. Team 2 also gets 25 overs.
Calculation:
- Team 1 at curtailment: 25 overs left, 2 wickets down = 61.8% resource lost
- Team 1 resource used: 100% - 61.8% = 38.2%
- Team 2 resource: 25 overs, 0 wickets = 68.7%
- Excess resource: 68.7% - 38.2% = 30.5%
- Extra runs: (30.5/100) × 225 = 68.63 = 69 runs
- Target: 100 + 69 = 169 to win
Result: Team 2 needs 169 in 25 overs (higher target because they knew the reduced overs in advance)
Official D/L Resource Percentage Table
This table shows the percentage of resources remaining for any combination of overs left and wickets lost. Resources are expressed as percentages of those available at the start of a 50-over innings (100%).
| Overs Left | 0 wkts | 1 wkts | 2 wkts | 3 wkts | 4 wkts | 5 wkts | 6 wkts | 7 wkts | 8 wkts | 9 wkts | 10 wkts |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 60 | 107.1 | 100.5 | 93.4 | 85.8 | 77.6 | 68.7 | 59.1 | 48.8 | 37.9 | 26.5 | 14.8 |
| 50 | 100.0 | 93.4 | 85.1 | 74.9 | 62.7 | 49.5 | 36.3 | 24.6 | 14.8 | 7.6 | 2.5 |
| 40 | 90.3 | 84.2 | 77.6 | 70.2 | 62.1 | 53.4 | 44.0 | 34.0 | 23.3 | 12.6 | 4.2 |
| 30 | 77.1 | 72.2 | 66.9 | 61.1 | 54.8 | 47.9 | 40.4 | 32.3 | 23.6 | 14.3 | 5.4 |
| 25 | 68.7 | 64.3 | 59.7 | 54.7 | 49.2 | 43.3 | 36.8 | 29.8 | 22.2 | 13.9 | 5.5 |
| 20 | 58.9 | 55.3 | 51.4 | 47.3 | 42.8 | 37.9 | 32.5 | 26.6 | 20.2 | 13.0 | 5.4 |
| 10 | 34.1 | 32.5 | 30.8 | 28.9 | 26.8 | 24.5 | 21.8 | 18.6 | 14.8 | 10.1 | 4.7 |
| 5 | 18.4 | 17.9 | 17.3 | 16.6 | 15.8 | 14.8 | 13.5 | 11.9 | 9.9 | 7.2 | 3.7 |
How to Read the Table:
- Find the row for overs remaining in the innings
- Find the column for wickets lost
- The intersection shows the resource percentage remaining
- Example: 30 overs left, 2 wickets down = 66.9% resources remaining
- For overs not shown, the calculator uses linear interpolation