Find a valid double-out checkout combination for any remaining score from 2 to 170 in a standard 501 or 301 darts game.
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In standard darts games like 501 or 301, a player must finish the leg with a "double out" — the final dart thrown has to land on a double segment of the board, or on the inner bullseye, which itself counts as a legal double. This rule creates situations where knowing the right combination of darts to throw, rather than simply aiming for the highest-scoring segment each time, becomes essential to closing out a leg efficiently and without wasting turns. This calculator searches methodically for a valid finish using at most three darts, checking whether a single-dart finish exists first, then two-dart combinations, then three-dart combinations, always making sure the final dart lands on a legal double. A well-known handful of scores between 159 and 169 — commonly nicknamed "bogey numbers" by regular players — genuinely cannot be finished within three darts under double-out rules at all, and this calculator flags those cases directly rather than returning an incorrect result.
Anyone who has played 501 or 301 darts with double-out rules knows the particular frustration of standing at the oche with a score that technically could be finished, if only you could remember the right combination under pressure. A darts checkout calculator exists exactly for this: enter your remaining score, and it works out a valid path to zero that ends on a double.
The double-out rule is what makes darts checkouts genuinely interesting rather than a simple subtraction problem. You can't simply throw your way down to exactly zero with any combination of darts — the very last dart thrown in the leg has to land on a double segment (worth twice the number's single value) or the bullseye's inner ring, which functions as "double 25." That constraint means some remaining scores that look perfectly reasonable are actually impossible to finish within the three darts of a single turn.
Those impossible scores are well known among regular players as "bogey numbers" — specifically 169, 168, 166, 165, 163, 162, and 159. Each one fails for the same underlying reason: there is no way to split it into three dart values where the final value is a legal double. A player left on one of these numbers needs to bring the score down further (often by aiming for a single rather than the highest score available) before a checkout becomes possible at all.
For every other score from 2 up to the maximum finishable total of 170, there's at least one valid path, and often several. This calculator searches methodically — checking whether the whole score can be hit in one dart, then two, then three — and returns the first valid finish it finds ending on a legal double. Professional players often favor specific "preferred" routes for well-known finishes (170 as triple-20, triple-20, bullseye is the classic maximum checkout), and while this tool won't rank every possible route by tradition or personal throwing style, it reliably confirms that a finish exists and shows one concrete way to get there.
170 is the maximum finishable score with three darts under double-out rules, typically hit as triple-20, triple-20, then the bullseye (double 25).
Scores like 169, 168, 166, 165, 163, 162, and 159 (the "bogey numbers") can't be split into three dart values ending on a legal double, so they're mathematically impossible to finish in one turn.
Yes — under standard double-out rules, hitting the inner bullseye (worth 50) counts as a valid double finish, equivalent to "double 25."
No, many scores have multiple valid checkout routes; this calculator shows one valid path, not necessarily the specific route professional players traditionally favor.