Bowling Handicap Calculator
A tenpin bowling league handicap from your average, the league’s basis score and its handicap percentage — with your handicapped score and series.
Leagues level the field by adding a handicap to each game: a percentage (commonly 80–100%) of the difference between a basis score (200, 210, 220 or 230) and your average, rounded down.
How the bowling handicap calculator works
Leagues level the field by adding a handicap to each game: a percentage (commonly 80–100%) of the difference between a basis score (200, 210, 220 or 230) and your average, rounded down. A 150 average in a 90% of 220 league gets 63 pins a game. Averages above the basis get no handicap, and some leagues cap the handicap.
Formula: handicap = floor((basis − average) × percentage)
Worked examples
| Inputs | Handicap per game | Note |
|---|---|---|
| 150 average, 90% of 220 | 63 | 63 pins |
| 180 average, 80% of 200 | 16 | 16 pins |
| 225 average above a 220 basis | 0 | 0 — scratch |
FAQFrequently asked questions
Why not 100%?
A 100% handicap would make every bowler’s expected handicapped score equal to the basis, removing any advantage for skill. Leagues use 80–90% so better bowlers keep a small edge while weaker ones stay competitive.
How is my average calculated?
Total pins divided by games bowled in the league, usually after an establishing period of three to nine games, and updated weekly. Most leagues truncate rather than round.
What if my average is above the basis?
You bowl scratch — zero handicap. A few leagues use negative handicaps for very high averages, but most simply cap at zero.
Does the handicap apply to a series?
Yes, once per game: a three-game series carries three times the handicap, as shown in the series row.
Where these figures come from
- World Handicap System — Rules of Handicapping — the score differential and handicap index formula
- International Cricket Council — Playing Conditions — over structure and run-rate definitions
- Cricket Australia — the national body for the sport these statistics most often describe here
Last checked: September 2026. Formulas follow the governing bodies where one publishes them — the World Handicap System for golf, the ICC playing conditions for cricket run rates.