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Baseball Darts Score Calculator

Keep score in baseball darts, inning by inning: runs on numbers 1–9, a box score, extra innings for ties and an optional seventh-inning stretch house rule.

Level: Grades 1–2

  • Common Core standard 1.OA.C.6Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
  • Common Core standard 2.OA.B.2Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Printable worksheet

Baseball Darts Score Calculator

Inputs
Players
Seventh-inning stretch (house rule)

One visit per inning, separated by commas, inning 1 first. Inning N scores only on N: single 1 run, double 2, treble 3. M = miss.

Separated by commas, in throwing order. Labels only; they never change the scores.

Result

Result

Player 1 wins 23–20

Player 1 wins 23–20. Player 1 23, Player 2 20.

Player 1: runs
23
Player 2: runs
20

See the step-by-step solution ↓

Box score (runs per inning)
Box score (runs per inning)
Player123456789R
Player 123421334123
Player 213133113420

Step-by-step solution

  1. Inning 1 scores only on 1: S1, S1 for Player 1 (single 1 run, double 2, treble 3)

    1+1=2

  2. Player 1: add the runs from each inning

    2+3+4+2+1+3+3+4+1=23

  3. Player 2: add the runs from each inning

    1+3+1+3+3+1+1+3+4=20

  4. Compare the totals: most runs wins once an inning ends with one player ahead

    result=Player 1 wins 23–20

  5. Player 1's average runs per inning: total runs divided by innings played, handy for comparing games

    239=2.56

Test yourself

20 quick questions built from this calculator's formula: work out results, predict what happens when an input changes, and work backward from an answer. Every answer comes with the working.

What this calculator does

Keep score in a game of baseball darts and see who's winning, inning by inning. The game turns the dartboard into a nine-inning ball game. In the first inning everyone throws at the 1. In the second they throw at the 2, and so on up to the 9. A single on the inning's number is one run. A double is two runs, and a treble (the narrow inner ring, worth triple) is three. So the best possible inning is nine runs. The most runs after nine innings wins.

Type each player's visits in inning order. A visit is one turn of up to three darts. The calculator adds up the runs and lays them out as a box score, like the inning-by-inning line score in baseball. If the game is tied after nine, it tells you to play an extra inning on the next number. It also offers the seventh-inning stretch, a popular house rule. It comes in two versions, so you can match the one your group plays.

Where it's used

Why this math matters outside the classroom:

  • Family game nights. A family keeps a box score on paper, adding each inning's runs, such as 2 + 3 + 4 = 9 after three innings.
  • Learning the board. Beginners learn where the low numbers sit, since innings 1 to 9 aim at numbers that 501 players rarely target.
  • Classroom addition. Pupils total nine single-digit innings, such as 2 + 3 + 4 + 2 + 1 + 3 + 3 + 4 + 1 = 23.
  • Baseball-themed parties. Hosts run a darts tournament between innings of a televised game, using the doubled seventh-inning rule.

Grade level and standards: Grades 1–2; Common Core State Standards for Mathematics 1.OA.C.6, 2.OA.B.2. © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

How to use it

  1. Choose the number of players and whether you play a seventh-inning stretch rule.
  2. Type each player's visits in inning order, separated by commas, such as S1 S1 M, D2 M S2.
  3. Type the darts as they landed. Darts on other numbers are allowed and score no runs.
  4. Read the result, each player's runs and the box score. If it's tied after nine, play the next inning. Then add it to every player's line.

What the inputs mean

Seventh-inning stretch (house rule)
A house rule, not part of the basic game. Published rules give two versions. In one, runs in the 7th inning count double. In the other, a player who scores no run in the 7th has their total so far cut in half (rounded down here).
Player 1 innings
Visit 1 is the 1st inning, visit 2 the 2nd, and so on. Up to three darts per visit. Put S (single), D (double) or T (treble) before the number, or M for a miss.
Player names
Separated by commas, in throwing order. Labels only; they never change the scores.

Formula and method

runs in inning N = number of darts on N × (1 single, 2 double, 3 treble), at most 9
total runs = sum of runs over the innings
stretch (double): 7th-inning runs × 2
stretch (halve): no run in the 7th → total so far ÷ 2, rounded down
tied after 9 → extra innings on 10, 11, 12 … until an inning ends with one leader

In the formulas, N is the inning number, which is also the number you aim at. Every inning has just one number that counts: the inning's own number. Hitting it in the big single area scores one run. The thin outer double ring scores two, and the treble ring scores three. Darts anywhere else, even a treble 20, score nothing. So the game rewards accuracy on numbers players don't usually aim at.

Totals are plain sums. The box score shows them inning by inning, with the total in the R (runs) column, like a baseball line score. A tie after nine sends the game to extra innings on the next numbers. In this scorer everyone throws in extra innings. The game ends after the first extra inning that finishes with a single leader.

The seventh-inning stretch comes from baseball's tradition of standing up in the middle of the seventh. Darts players have turned it into a twist, but groups disagree on which twist. So it's offered as a clearly labeled house rule, not as part of the standard game.

Worked example

Two made-up players, Cass Whitlow and Odile Brannigan, play nine innings with no stretch rule. In innings 1 to 5, Cass throws S1 S1 M, D2 M S2, T3 M S3, S4 S4 S13 and M S5 S12. In innings 6 to 9, Cass throws D6 S6 M, S7 S7 S7, T8 S8 M and S9 M S12. In innings 1 to 5, Odile throws S1 M M, S2 S2 S2, S3 M M, D4 S4 M and S5 D5 M. In innings 6 to 9, Odile throws S6 S10 M, M S7 M, S8 S8 S8 and T9 S9 M.

  1. Cass's innings: 2, 3 (a double and a single), 4 (a treble and a single), 2, 1, 3, 3, 4 and 1. The 13 and the 12s hit the wrong numbers, so they score nothing.
  2. Cass's total: 2 + 3 + 4 + 2 + 1 + 3 + 3 + 4 + 1 = 23 runs.
  3. Odile's innings: 1, 3, 1, 3, 3, 1, 1, 3 and 4, a total of 20 runs.
  4. With the doubled seventh-inning rule instead, Cass's 3 runs in the 7th would count as 6 (total 26). Odile's 1 would count as 2 (total 21).

Result: Cass wins 23–20.

Understanding the result

Runs per inning show you which numbers you struggle with. The working also shows average runs per inning. It's a handy way to compare games of different lengths, including unfinished ones. The most it can be is 9, the perfect inning.

In a game that's still going, the result names the leader so far. In this game, later innings are worth no more than early ones. So a lead can change at any point.

Assumptions and limitations

  • Each player throws one visit of up to three darts per inning, in a fixed order.
  • The bull (the bullseye in the center) scores nothing in regular innings.
  • In extra innings everyone throws. The game ends when an inning finishes with one player ahead, up to inning 20.
  • It doesn't score the base-running version, where singles, doubles and outs move runners around the bases. This is the runs-per-dart version.
  • Calling a bull a home run, and bull tiebreakers, aren't included.
  • Up to four players.

Frequently asked questions

How do you score baseball darts?

In inning N, throw three darts at the number N. A single scores 1 run, a double 2 and a treble 3. Anything else scores nothing. Add the runs over nine innings, and the highest total wins.

What is the seventh-inning stretch in darts?

It's a house rule for the 7th inning, and groups play it differently. In one version, runs in the 7th count double. In another, scoring no run in the 7th halves your total. It isn't part of the basic game, so agree on it before you start.

What happens if baseball darts is tied after nine innings?

Play extra innings on the next numbers, 10, then 11 and so on, until an inning ends with one player ahead. Some groups use a bullseye throw-off instead.

What is a perfect game of baseball darts?

Three trebles in every inning. That's 9 runs an inning for 9 innings, which is 81 runs.

Sources

How this calculator is checked

Method: Published house rules for baseball darts (DolfDarts; Bar Games 101): inning N on number N, runs 1/2/3 for single/double/treble, most runs after nine wins, extra innings on 10, 11, … for ties. Both seventh-inning stretch versions are published as optional variants and are labelled house rules here. The calculation is covered by automated tests with known reference values and edge cases. Last updated 2026-10-18. Found a problem? Tell us.

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