Boundary-run share asks what proportion of a batter's runs came from fours and sixes. Boundary-ball rate asks what proportion of recorded balls faced produced those boundaries. Their numerators and denominators are different, so their percentages need not be similar.
One hypothetical innings, two calculations
Assume a batter scores 46 from 30 balls faced, with six recorded fours and two recorded sixes. All eight boundary events in this example belong to deliveries included in the balls-faced count and use ordinary four-run and six-run allowances.
| Measure defined here | Calculation | Result |
|---|---|---|
| Runs from boundaries | 6 × 4 + 2 × 6 | 36 runs |
| Boundary-run share | 36 / 46 × 100 | 78.26 percent |
| Boundary-ball rate | 8 / 30 × 100 | 26.67 percent |
The batter obtained most runs from boundaries while fewer than a third of the balls faced produced them. There is no contradiction: boundary deliveries add several runs each.
Why the remaining balls are not all dots
The other 22 balls contributed ten runs. That does not mean 22 dot balls. For example, ten singles and twelve dots could produce that remainder. Five twos and seventeen dots could also do so. These are alternative hypothetical distributions, not a reconstruction of the innings.
To calculate an actual dot-ball rate, you need the delivery outcomes. The totals of runs, balls, fours and sixes alone do not identify how the remaining runs were distributed.
Keep the fields aligned
- Use the batter's runs and balls faced from one scorecard version.
- Count boundaries credited to that batter, not team bye or leg-bye boundaries.
- State whether the percentage refers to runs or balls.
- Check the provider's definition before comparing a field labelled only boundary percentage.
Do not silently use a team score as the denominator for an individual batter's boundary-run share. That would measure the contribution to the team total, a third and different question.
Interpret the result within its limits
These proportions describe scoring composition. They do not establish shot quality, consistency or the probability of a future boundary. If runs or balls are zero, the corresponding percentage is undefined. Keep the raw counts beside the calculated rate so readers can see the sample size. Return to cricket reading guides.