🦆 Official National Duckpin Bowling Congress (NDBC) Rules

DUCKPIN BOWLINGSCORE CALCULATOR

Track and score your Duckpin games with authentic 3-ball frames, automatic strike and spare compounding, and real-time AI score projections.

🦆 DUCKPIN RULES (3 BALLS / FRAME)
🎳Bowler 1
AI Duckpin Projection
120Average
Max Possible
300WR: 279
Total Score
0points
Marks & Tens
0 Strikes / 0 Spares
Frame Auto-Focus Active👈 Swipe Frames 👉
Frame 1
Frame 2
Frame 3
Frame 4
Frame 5
Frame 6
Frame 7
Frame 8
Frame 9
Frame 10
Select Roll forFrame 1, Ball 1Duckpin rules: 3 balls allowed every frame
Click any box on the scoreboard to edit
Duckpin Scoring Rule Guide
Ball 1: Strike (X)10 pins + pinfall of next 2 balls.
Ball 2: Spare (/)10 pins + pinfall of next 1 ball.
Ball 3: Ten (10)10 pins total. No bonus points awarded!
Open Frame (< 10)Count of pins knocked down in all 3 balls.
🏆Duckpin World Record: 279

Unlike 10-pin bowling where 300s are bowled daily, no person has ever bowled a 300 in sanctioned Duckpin history! Pete Schmitt's 279 in 1992 stands unbroken.

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Duckpin Bowling vs. Standard 10-Pin Bowling

FeatureDuckpin BowlingStandard 10-Pin
Rolls per Frame3 rolls in all 10 frames2 rolls (3 only in 10th)
Ball Size & Weight4.75–5.0" diameter, ~3 lbs 12 oz (No finger holes)8.5" diameter, up to 16 lbs (Finger holes)
PinsShorter, squatter duckpins (9.4" tall)Tall, tapered pins (15.0" tall)
Strike (Ball 1)10 + next 2 rolls10 + next 2 rolls
Spare (Ball 2)10 + next 1 roll10 + next 1 roll
Ten / Closed (Ball 3)10 points flat (NO bonus points!)N/A (No 3rd ball in frames 1-9)
World Record High Score279 (Pete Schmitt, 1992 — No 300 has ever been bowled!)300 (Perfect Game)

Understanding the 3-Ball Duckpin System

Because duckpin balls are light and lack finger holes, and duckpins are shorter and harder to knock down through chain-reaction pin carry, the sport grants bowlers a third delivery in every frame:

1st Ball: Strike (X)

All 10 pins down on roll 1. Frame ends immediately. Score = 10 + next two deliveries.

2nd Ball: Spare (/)

Remaining pins cleared on roll 2. Frame ends. Score = 10 + next single delivery.

3rd Ball: Ten (10)

Remaining pins cleared on roll 3. Score is 10 points. No future bonus pins are awarded.