Bowling average is the total number of pins knocked down divided by the number of games bowled. It's the universal metric for measuring bowling skill, used in leagues, tournaments, and handicap calculations. A perfect game is 300 (12 strikes), so averages range from 0-300.

Unlike many sports where higher scores come from more playing time, bowling average is a pure skill metric normalized across game count. A 200 average means you consistently score around 200 per game regardless of whether you bowl 10 games or 100 games—making it the fairest comparison between bowlers.

League averages are calculated over minimum game counts (usually 21+ games) to ensure statistical validity. Book averages (all games ever bowled) can differ from current form. Most competitive bowlers track both their league average (for handicap) and recent 10-game average (for current performance trending).

Step 1: Add up your total pins from all games. Include every frame—don't cherry-pick your best games. Most bowling alleys track this automatically on score sheets.

Step 2: Count total games bowled. Each complete game (10 frames) counts as one game, even if you bowled poorly. Incomplete games shouldn't be counted.

Step 3: Divide total pins by total games. This is your bowling average. Round to one decimal place for standard reporting (e.g., 187.5, not 187.476).

Step 4: Use the informal rating bands as a rough house-bowling reference. They are not universal competition standards.