301 Darts Rules

Understanding 301 darts rules is essential whether you?re playing in the pub, practising at home, or assessing a short-format match for betting purposes. 301 is quick, tactical, and unforgiving: a couple of missed doubles can swing an entire leg. At DartsStats.com, we break down the format clearly so you know exactly how the scoring works, what ?double in? and ?double out? really mean, and how a leg is actually won. This guide covers the standard rules first, then the common variations you?ll see in leagues and casual games.

What Is 301 Darts?

301 is a darts game where each player (or team) starts on a score of 301 and attempts to reduce that score to exactly zero. Players take turns throwing three darts per visit. The game is popular because it finishes quickly and highlights accuracy under pressure, especially on doubles.

Compared with 501, the shorter starting total means:

• There is less time to ?settle in?, so fast starters matter.
• Checkout chances can arrive within one or two visits.
• Missed doubles can be decisive because opponents may get immediate chances.

Objective of the Game

The objective is simple: be the first to reach exactly zero from 301, following the finishing rules in use (most commonly double out; sometimes double in and double out).

Exactly zero matters

You must finish on the required finishing segment (typically a double) and your final dart must take you to exactly zero. If your score goes below zero, or ends at 1 when double out applies, that visit does not count (see ?bust? under scoring).

Starting Score and Order

Each player starts on 301. The order of play is usually decided in one of these ways:

• Throw for the bull (closest to bull starts). Many leagues use this in competitive play.
• Alternate start by leg (winner of previous leg throws second next leg), depending on house rules.
• Coin toss or agreed method in casual play.

How turns work

• Players throw up to three darts per turn.
• After three darts (or fewer if the leg is finished), the next player takes their turn.
• Only the darts that land in the board score; bounce-outs score zero.

Double In Explained

?Double in? means a player?s scoring does not start until they hit a double. Until a double is hit, all darts thrown score zero for that player.

What counts as a double?

Any dart landing in the thin outer ring for numbers 1?20 is a double (e.g., D20, D16, D10). Many rule sets also allow the bull:

• Outer bull (25) is usually treated as a single bull, not a double.
• Inner bull (50) may be allowed as a double (effectively ?double 25?) in some formats, but always confirm local rules.

Practical example (double in)

If you?re playing double in 301 and your first dart hits S20 (single 20), you still score 0 because you haven?t doubled in. If your second dart hits D20, you have doubled in and that dart counts (40). Your third dart then scores normally (e.g., T20 adds 60). Your score for the visit would be 40 + 60 = 100, reducing 301 to 201.

Double Out Rules

?Double out? means you must finish the leg by hitting a double that takes your score to exactly zero. This is the most common finishing rule in organised darts because it tests nerve and precision.

What is a valid finish?

• Your final dart must land in a double segment (e.g., D20 to finish 40; D16 to finish 32).
• In many rule sets, the inner bull (50) is treated as a double and can be a finishing dart if your remaining score is 50.
• Finishing on a single (e.g., S1 to take 1 to 0) is not allowed in double-out games because there is no ?single 0?.

Common double-out checkouts in 301

• 40 = D20
• 32 = D16
• 24 = D12
• 20 = D10
• 16 = D8
• 50 = Bull (if allowed as a double)

Scoring System

Scoring in 301 uses the standard dartboard values:

• Singles score the face value (e.g., S19 = 19).
• Doubles score twice the value (e.g., D19 = 38).
• Triples score three times the value (e.g., T19 = 57).
• Outer bull scores 25.
• Inner bull scores 50.

Bust rule (crucial in 301)

If a player?s score goes below zero, or reaches an impossible finish (typically 1 in double-out), the player is ?bust?. When bust:

• Their score for that turn is cancelled.
• Their score resets to what it was at the start of the visit.
• The turn ends immediately (remaining darts are not thrown).

Bust examples

• You have 32 left (double out). You hit T12 (36). That takes you below zero, so you are bust and your score returns to 32.
• You have 20 left (double out). You hit S19, leaving 1. Since you cannot finish 1 on a double, the visit is bust and you return to 20.

How a Leg Is Won

A leg is won when a player reduces their score from 301 to exactly 0 in accordance with the agreed rules (most often double out; sometimes double in and double out).

Typical leg flow in 301

• Players score heavily early with treble targets (often 20s or 19s).
• Because 301 is short, players may choose safer routes to leave a favourite double quickly.
• The leg often comes down to who takes the first clean chance on a double.

Why ?set-up shots? matter

In 301, you?ll frequently hear players talk about ?leaving a finish?. For example, if you have 62 left, many players prefer S12 to leave 50 (bull) or T10 to leave 32, depending on their comfort. In short formats, one smart set-up dart can be as valuable as a big treble.

Common Variations

While the core idea stays the same, 301 rules can vary by league, venue, or competition. Always confirm the house rules before play (and before using stats to judge performance).

Single in / double out

The most straightforward version: scoring begins immediately, but you must finish on a double. This is common in casual games and many local leagues.

Double in / double out

Harder and more tactical. Players must hit a double to start scoring and also to finish. This tends to increase the importance of opening accuracy and can create more ?scrappy? legs where missed doubles decide outcomes.

Master out

Less common in 301, but sometimes used: you must finish on a double or a treble. This changes optimal routes and makes certain finishes easier.

Team 301

Pairs or teams may play 301 with alternating throws. Common formats include:

• Alternate throws (Player A throws three, then Player B throws three, etc.).
• Alternate darts (Player A throws dart 1, Player B throws dart 2, Player A throws dart 3), less common but used for fun formats.

When 301 Is Used

301 is popular in environments where time is limited or where organisers want to test finishing and composure quickly. You?ll most often see it used in:

• Pub and social darts (quick legs keep games moving).
• Local leagues where matches include multiple legs across many boards.
• Practice routines designed to sharpen doubling and early-leg scoring.
• Warm-ups before longer formats like 501, to get the arm moving and practise pressure doubles.

How 301 changes betting analysis

Because legs are shorter, variance increases. A couple of visits can decide everything, which means:

• The throw (who starts) can matter more than in longer formats.
• Checkout efficiency (especially under 40) is often decisive.
• Players who start fast and hit an early treble can generate immediate separation.

Betting scenario 1: Leg winner in a single 301 leg (double out)

Imagine a one-leg 301 match (common in quick-play formats). Player A throws first.

• After two visits, scores are: Player A: 88 remaining, Player B: 121 remaining.
• Player A has a potential two-dart setup and a likely double: 88 can go T20 (60) leaving 28, then D14.
• Player B at 121 has a classic finish route: T20 (60), T11 (33), D14 (28) ? but it?s a three-dart checkout and requires accuracy on two trebles.

If an in-play line offers Player A to win the leg at 1/2 (fractional) or 1.50 (decimal), your decision should focus on the quality of the next visit: does Player A regularly take out 88 or at least leave a strong double? In 301, being first to a clean double chance often outweighs raw scoring averages.

Betting scenario 2: Total legs over/under in a 301 race (double in, double out)

Suppose a match is a best-of-7 legs (first to 4), but with double in, double out. That rule-set typically produces more breaks of throw and more missed-start turns.

• Pre-match market example: Over 5.5 legs priced at 10/11 (fractional) or 1.91 (decimal).
• Key reasoning: double-in reduces the advantage of throwing first because both players can ?stall? until they find a starting double, increasing swinginess and making 4?2 or 4?3 outcomes more plausible than a routine 4?0.
• Numbers in play: if both players average around 35% on doubles and are inconsistent on the opening double, you can expect more missed chances, longer legs, and more opportunities for the trailing player to stay close.

This doesn?t mean ?over? is always right; it means the rules themselves can shift probabilities. In short formats, always ask: is the match using single in, double in, and what finishing rule applies?

FAQs

Do you have to finish on a double in 301?

In most standard 301 formats, yes: it?s usually double out. However, some casual games use single out, so agree the rules before starting.

What does ?double in? mean in 301?

Double in means your scoring only begins after you hit a double. Until you hit a double, all darts score zero for you.

Is bull a double for double in or double out?

Often the inner bull (50) is treated as a double for finishing (and sometimes for starting), but this can vary. Confirm whether bull counts as a double in your league or match rules.

What happens if you go below zero?

You are ?bust?. Your entire visit is cancelled and your score returns to what it was at the start of that turn, and your turn ends immediately.

Can you win 301 with one dart?

No. Even a maximum single dart (50 on bull) cannot take 301 to zero. The quickest possible leg depends on rules and accuracy, but it will take multiple darts and usually includes trebles and a finishing double.

What is the difference between 301 and 501?

Both games aim to reach exactly zero, typically with double out. The difference is the starting score: 301 is shorter and tends to be more volatile, with fewer visits and more emphasis on quick checkouts.

Do bounce-outs count in 301?

No. A dart that falls out of the board scores zero, and you do not rethrow it.

The Final Throw

301 is darts in fast-forward: you start at 301, score down with singles, doubles and trebles, and (in most formats) you must land a double to finish. Understanding busts, set-up shots, and how double in/double out changes the flow will make you a better player and a better reader of short-format matches.

For analysis, keep an eye on who throws first, how reliably each player hits doubles under pressure, and whether they consistently leave sensible finishes (rather than ?hoping? for a miracle checkout). In 301, one smart visit can effectively decide a leg.

If you?re using these rules to inform betting decisions, treat 301 with respect: short formats can swing quickly, and a single missed double can flip a price. Set limits, avoid chasing losses, and only stake what you can afford to lose.