Is this an official rating?
No. It is a transparent index combining wickets with runs saved against a par economy. The 25-run value per wicket is our teaching choice.
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Bowling Impact Rating Calculator
A transparent bowling impact rating combining wickets taken with runs saved against a par economy rate. Illustrative composite, not an official metric.
rating = wickets×25 + (par economy − economy)×overs — illustrative
Frequently asked questions
Why value a wicket at 25 runs?
As a rough run-equivalent: a wicket both removes a batter and slows scoring. Twenty-five is an illustrative figure, not an official conversion, so adjust it if you disagree.
What are 'runs saved'?
How many fewer runs the bowler conceded than a par bowler would have over the same overs. Bowling tighter than par adds to the score; leaking runs subtracts.
Does this capture pressure?
Not directly. Bowling a tight spell at the death is worth more than the same figures in a quiet phase, which this simplified index does not weigh.
How should I read it?
As a combined view of wicket-taking and containment, useful for comparison, but illustrative rather than official.