Bowling Score CalculatorBowling Average Calculator
Paste your game scores, or enter total pins and games. Your average updates as you type.
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Your average
183
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By the Bowling Score Calculator team · Checked against the USBC Playing Rules · Last updated October 20, 2026 · How we check our math
How do you calculate a bowling average?
Add up the scores of all your games to get total pins. Divide total pins by the number of games. Drop the fraction. For example, 1,650 pins over 9 games is 183.33, so your average is 183. This is the method in USBC Playing Rules, Rule 108a.
Average = Total pins ÷ Games bowled
The rule text is in the USBC Playing Rules (Rule 108a). It notes that fractions are kept only to break a tie for a league's high average award.
How many pins do you need to raise your average?
Multiply your target average by your games plus one. Then subtract your current total pins. With 1,650 pins over 9 games, a 185 average needs 185 × 10 = 1,850 pins. That means you need a 200 game next.
Pins needed next game = Target × (Games + 1) minus Total pins
Why your average matters
In a handicap league, your average sets how many pins you get each game. Plug your result into the bowling handicap calculator. To score each game, use the bowling score calculator.
Frequently asked questions
Do you round a bowling average?
No. USBC Rule 108a says fractions are dropped when an average is used for handicap. A 183.8 average is a 183 average. The fraction is used only to break ties in league standings.
How many games do I need for an average?
You can figure an average from any number of games. For tournaments, USBC Rule 319 asks for a league average based on at least 21 games, unless the tournament rules say otherwise.
Can I use one game score?
Yes, but one game says little about your skill. Your average gets more useful with each game you add.