Dart Score Calculator for 301 and 501 Games
The Dart Score Calculator does the math for your X01 dart games so you can focus on throwing. Enter your three-dart total each turn and it tracks every player's remaining score, flags busts, and suggests the checkout you need to finish.
It handles both 301 (the quick standard game) and 501 (the long game used in professional play), supports 2 to 4 players with custom names, and works as a clean digital scoreboard for home matches, pub nights, or league practice — no pen, paper, or mental arithmetic required.
How to Use the Dart Scorer
Pick a game mode
Choose 301 for the standard short game or 501 for the long game. Both count down from the starting score to exactly zero.
Set Double Out and add players
Leave Double Out on so the final dart must land on a double to win, or turn it off for a casual finish. The game starts with 2 players — use Add Player for up to 4 and rename each one.
Enter each turn's total
Type your three-dart total (0–180) and press Enter or the submit button, or tap a quick score button for a common value like 26, 60, or 180.
Finish on a checkout
When a checkout is in range, follow the suggested combination to land on exactly zero. The winner screen then shows total darts, rounds, average per turn, and best turn.
Features
301 and 501 Modes
Play either popular X01 format. The starting score is subtracted turn by turn until a player reaches zero.
2–4 Players
Add up to four players, each with a custom name and color, and let the scorer rotate turns automatically.
Double Out Rule
Toggle the standard rule that the final dart must hit a double (or the bull for 50) to win the game.
Checkout Suggestions
With Double Out on, finishes up to 170 show exact dart targets in standard notation like D20 and T19.
Bust Detection
A score that drops below zero — or to exactly 1 with Double Out on — is flagged as a bust with a shake and toast, and the turn is forfeited.
Quick Score Buttons
One tap submits a common score — Miss, 26, 41, 45, 60, 85, 100, 140, or 180 — without typing.
Live Stats & Progress
Each player card shows the remaining score, last turn, average, total darts, and a progress bar.
Turn History
A slide-out panel lists every turn grouped by round with the player, score, and remaining points, busts marked in red.
Unlimited Undo
Reverse any number of turns with the undo button or Ctrl+Z — even after a game-over screen appears.
Rematch & New Game
Replay with the same players and settings, or start a new game to change the mode, rules, and lineup.
Frequently Asked Questions
How does dart scoring work in 301 and 501?
Each player starts at the chosen number — 301 or 501 — and subtracts the total of their three darts every turn. The first player to count down to exactly zero wins. Enter your turn total and the calculator updates the remaining score for you.
What is the difference between 301 and 501?
The only difference is the starting score. 301 is the shorter, quicker game often used as a warm-up, while 501 is longer and is the standard format in professional tournaments. The rules — including Double Out — are otherwise identical.
What does Double Out mean?
Double Out is the standard competitive rule that the dart which takes a player to zero must land on a double segment (or the bullseye, which counts as a double 25 for 50). When it is enabled, the calculator only accepts a valid double finish and treats anything else as a bust.
What is a bust in darts?
A bust happens when a turn would take a player below zero, or — with Double Out on — leave them on exactly 1, since you cannot finish on 1 with a double. When a bust occurs the score stays unchanged, the turn is lost, and the calculator shows a warning.
How do I read the checkout suggestions?
Checkout combinations use standard notation: D is a double (D20 = double 20 = 40), T is a triple (T19 = triple 19 = 57), a plain number is a single, and Bull is the 50-point bullseye that counts as a double for finishing. Suggestions appear for finishes up to 170 when Double Out is on.
Why is the maximum score per turn 180?
A turn is three darts, and the highest single-dart score is triple 20 (60). Three triple 20s make 60 × 3 = 180, the famous maximum, so the input accepts any total from 0 to 180.
Can I undo after the game ends?
Yes. If a wrong score ends the game, press the undo button or Ctrl+Z to reverse the last turn and keep playing. Undo works repeatedly, so you can step back through several turns.
Is my game data saved or private?
The game runs entirely in your browser and nothing is sent to a server. Because there is no stored save, refreshing the page resets the current game.
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