Darts checkout calculator
Enter any remaining score from 2 to 170 and get a valid finishing route that ends on a double — the rule for standard 501 and 301 (01) games. Each dart is shown as a single (S), treble (T), double (D) or Bull. It is built for players practising their finishes and for anyone refereeing a casual match.
How it works
A standard dartboard has 20 numbered segments plus the 25 outer bull and 50 bullseye. Every throw scores its segment value times a multiplier: single (×1), treble (×3) or double (×2). A legal 01 checkout must reduce the score to exactly zero with the last dart in a double (the outer ring or the 50 bull).
The tool searches for the shortest route in this order:
- One dart — the score is exactly a double (e.g. 40 = D20).
- Two darts — any dart, then a double finishes it.
- Three darts — it tries the highest-scoring darts first, then a double.
Scores below 2 or above 170 have no three-dart finish, and the seven bogey numbers (169, 168, 166, 165, 163, 162, 159) are flagged as impossible.
Common finishes at a glance
| Remaining | Suggested finish | Notes |
|---|---|---|
| 170 | T20, T20, Bull | Highest possible checkout |
| 167 | T20, T19, Bull | |
| 100 | T20, D20 | Two-dart finish |
| 81 | T19, D12 | |
| 60 | S20, D20 | or T20 missed = S20 |
| 40 | D20 | One dart |
| 32 | D16 | Preferred double for many pros |
| 12 | D6 | |
| 2 | D1 | Lowest possible checkout |
The seven bogey numbers
169, 168, 166, 165, 163, 162, and 159 cannot be finished in three darts under any combination of legal throws. If you leave one of these scores, you must knock it down on your next visit to a different number before attempting a checkout. The calculator flags these so you know not to try finishing and to plan ahead instead.
Worded example
You have 170 left, the highest possible checkout:
- Dart 1: T20 (treble 20) → 170 − 60 = 110
- Dart 2: T20 → 110 − 60 = 50
- Dart 3: Bull (50) → 50 − 50 = 0 — checkout complete (bull counts as a double)
For a score of 81: T19 (57) leaves 24, then D12 closes it in two further darts, or S19 (19) leaves 62, which does not leave a clean two-dart finish.
Practice uses
The checkout calculator is also a practice tool: enter scores that come up frequently in your games (100, 81, 61, 41) and memorise the preferred routes for each before your next session. Most experienced players have the top 20 finishes memorised and only need to look up unusual numbers.
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