Calculate bowling handicap from your league’s basis score and percentage, with optional adjusted-game and series totals.
Bowling Handicap Formula or Method
League handicap is a percentage of the positive difference between the basis score and the bowler’s whole-pin handicap average. The entered-average fraction is dropped first, then the fractional handicap result is dropped; averages at or above the basis receive zero in this model.
How the Calculation Works
The calculator applies the displayed relationship or scoring method to the visible required inputs and reports one defined result with supporting detail.
How to Use This Calculator
- Keep the listed result selected in the Solve for menu.
- Enter or select every visible required value.
- Select Calculate and review the primary answer, supporting values, and steps.
- Use Reset before starting a different game or scenario.
Worked Example
At 90% of a 220 basis, a 155 average produces 58.5 raw pins, so the handicap is 58. A 165 scratch game becomes 223 after handicap.
Input and Result Guide
| Item | How to use it |
|---|---|
| Basis | Use the exact basis score written in the league or tournament rules. |
| Percentage | Use the event’s handicap percentage, such as 90%. |
| Average | Enter the event average; its fractional portion is dropped before the basis difference is calculated. |
| Adjusted game | Optional scratch game plus per-game handicap. |
| Series handicap | Per-game handicap multiplied by the entered series length. |
Interpreting the Result
Compare results only when the scoring format, league settings, units, and sample definitions are consistent.
Assumptions and Limitations
There is no universal basis and percentage for every league. This calculator does not apply caps, negative handicap, team limits, rerates, or other local provisions unless they are already reflected in the values you enter.
Common Questions
Why is there only one Solve for option?
This tool has one defined output. The selector keeps the workflow and saved state consistent across this calculator collection.
Will my last successful calculation be restored?
Yes. The calculator saves enabled source values and the successful result in this browser. Reset clears that saved state.
Sources
United States Bowling Congress, Playing Rules, Rule 100d handicap leagues, current 2026-27 season; the league’s adopted rules control the actual basis and percentage.