Bowling Handicap Calculator

How bowling handicap works

A handicap gives lower-average bowlers a per-game bonus so they can compete with stronger bowlers. The standard formula is:

Handicap = (Basis − Your Average) × Percentage

For example, with a 150 average, a 220 basis, and 90%: (220 − 150) × 0.90 = 63. That bowler adds 63 pins to each game. If they bowl a scratch 165, their handicapped score is 228. A bowler whose average meets or exceeds the basis gets a handicap of zero. Most leagues don't give negative handicaps.

The exact basis and percentage vary by league, so always confirm yours with the league secretary. Learn the underlying scoring in how scoring works.

What handicap is for, in USBC’s words

The United States Bowling Congress defines handicapping as “the means of placing bowlers and teams of varying degrees of bowling skill on as equitable a basis as possible for competition against each other.” The basis score and the percentage are chosen by each league in its own rules, which is why two leagues in the same center can hand the same bowler different handicaps.

Does 80% or 90% actually level the field?

Not according to USBC’s own research. Its Handicap Facts sheet reports a four-year study of mixed, all-women and all-men handicap leagues, and the results are blunt: at 70%, 75% and 80% handicap, the team with the higher average won the championship in 100 of 100 cases. At 85% the lower-average team won 6 of 100; at 90%, 11; at 95%, 24; and even at 100% handicap the higher-average team still won 70 of 100. USBC calculates that an exact 50-50 split would need a 116% handicap.

The sheet also shows why with a worked example: when every bowler on two teams bowls exactly their average, the higher-average team wins at 80% and at 90%, and the two teams tie only at 100%. In its example a team averaging 607 with 80% handicap totals 921 against the stronger team’s 965; at 100% both reach 1,000.

What that means for your league

• If your league wants newcomers to have a real chance at the title, 100% of a high basis is the setting USBC’s numbers support. Anything below 85% is, in practice, a scratch league with extra arithmetic.
• Watch the gap in averages, not just the percentage. USBC’s note is that “you must always look at the difference in averages as well as handicap.”
• Handicap is usually figured per game and added to each game, so a 63-pin handicap adds 189 pins to a three-game series.

Keep your own average current with the score tracker, which recalculates it every time you add a game, and read how leagues use handicap in the league beginner’s guide.

Source: USBC, Handicap Facts (definition, four-year study table, 116% figure and the worked two-team example).