Darts Average Calculator

What this calculator does

Find your 3-dart average, the main number used to measure a darts player. It's the points you score, on average, with each visit (each turn of three darts). TV graphics, league tables and practice apps all show it. It's the quickest way to compare your game with last month's, or with a friend's.

Enter your total points and darts for a session, or type the score of each visit in a leg (one game of 501). The calculator gives your 3-dart average and your average per dart. It shows the first-9 average when there are enough visits. If you track darts thrown at a double, it adds a checkout percentage. It also shows how many darts a 501 leg would take at that scoring rate.

Where it's used

Why this math matters outside the classroom:

• League nights. A league player who scores 3,006 points with 108 darts has a 3-dart average of 3,006 ÷ 108 × 3 = 83.5.
• Practice tracking. A player logs each session's points and darts to see whether the average climbs from 55 to 60 over a month.
• Finishing drills. After 6 checkouts in 15 darts at a double, a player's 40% checkout rate shows finishing is the weak spot.
• Watching on TV. Viewers compare two players' first-9 averages, such as 98.7 and 91.2, to see who is scoring faster early in legs.
• Rates in class. Students find a per-dart rate and scale it to three darts, a unit-rate problem with a familiar game.

Grade level and standards: Grade 6; Common Core State Standards for Mathematics 6.RP.A.3.b, 6.SP.B.5.c. © 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 whether to enter totals or the score of each visit.
2. For totals, enter the points scored and every dart thrown. If you like, add legs won and the darts you threw at a finishing double.
3. For visits, list each visit's score in order. Then say how many darts the last visit used.
4. Read the 3-dart average and the other figures underneath.

What the inputs mean

Darts thrown

Count every dart, including the one or two darts of a visit that finished the leg. A 501 leg finished with the second dart of the seventh visit is 6 × 3 + 2 = 20 darts.

Darts thrown at a finishing double (optional)

Darts aimed at a double that could have finished the leg. Darts at a double to set up a finish don't count.

Score of each visit, in order

Each visit is up to three darts, so the most is 180. Some totals near the top can't be made with three darts, such as 179 and 163, and are rejected.

Darts used in the last visit

When the leg ends with the first or second dart of a visit, the rest of the visit isn't thrown, so only those darts count.

Formula and method

3-dart average = points scored ÷ darts thrown × 3
average per dart = points scored ÷ darts thrown
first-9 average = points from the first 3 visits ÷ 9 × 3
checkout % = legs checked out ÷ darts at a finishing double × 100
darts per 501 leg ≈ 501 ÷ average per dart

The average is worked out per dart and then multiplied by 3. It doesn't divide points by the number of visits. That matters at the end of a leg. A finish with one or two darts uses fewer than three darts. Counting it as a full visit would make the average look lower than it is.

The first-9 average uses only the first three visits of a leg. That's when every player aims at the treble 20 instead of setting up a finish. So it's a cleaner measure of pure scoring power. Checkout percentage measures finishing instead. It's worked out per dart at a double, not per leg.

Worked example

An invented player, Lena Hartwig, wins a 501 leg with visits of 100, 60, 81, 140, 45 and 60, then checks out 15 with her second dart of the seventh visit.

1. Points: 100 + 60 + 81 + 140 + 45 + 60 + 15 = 501.
2. Darts: six full visits of 3 plus 2 in the last visit = 20 darts.
3. 3-dart average: 501 ÷ 20 × 3 = 75.15.
4. First-9 average: (100 + 60 + 81) ÷ 9 × 3 = 80.33.
5. With totals instead, 3,006 points in 108 darts is 3,006 ÷ 108 × 3 = 83.50.

Result: Hartwig averaged 75.15 for the leg, with a first-9 average of 80.33.

Understanding the result

A 3-dart average of about 40 to 50 is typical of a casual pub player. 60 to 70 fits a solid league player. Anything near 100 is the level of top professionals. These are rough bands, not official grades.

A first-9 average well above your overall average usually means your scoring is strong, but finishing costs you darts. Checkout percentage shows the same thing from the other side.

Assumptions and limitations

• Standard dartboard scoring: singles, doubles, trebles, the outer bull (25) and the bullseye (50).
• A bust (a visit that goes over and doesn't count) or a visit that scores nothing is entered as 0. Its darts still count.
• Every visit except the last uses three darts.
• Some organisations count darts slightly differently in busts or after a leg is decided. Check their rules if you're matching official statistics.
• The darts-per-leg figure ignores the extra darts needed to finish on a double.
• It doesn't separate legs. So a session's first-9 average needs the visits from the start of each leg.

Frequently asked questions

Sources

• Darts glossary: 3-dart average, double, check-out and bogey numbers (PDC Europe) (checked 2026-10-19)

How this calculator is checked

Method: Standard darts statistics: 3-dart average = points ÷ darts × 3 (average points per three-dart visit, as defined in the PDC Europe glossary); first-9 average over the first three visits; checkout percentage per dart at a finishing double. Possible visit totals derived from the dartboard's segment values. 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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