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Darts calculator

Score one straight-in, double-out darts visit with automatic bust handling.

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Darts calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Answer

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Score one straight-in, double-out darts visit with automatic bust handling.

More results
Precision and calculation record
Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.
Saved scenario
Save the current answer, then change an input to compare. This clears when you leave.
Formula and assumptions
Enter up to three throws in order. S, D and T mean single, double and treble; SB = 25, DB = 50 and 0 = miss. Going below zero, leaving one, or reaching zero without a double busts the whole visit. The next player then throws; remove any extra darts entered after a bust or checkout. This is a single-visit scorer, not a match manager or double-in variant.
Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.
Scratch calculator
Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.
Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.
Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.
Keyboard shortcuts
Updated 
Using Darts calculator
Score one straight-in, double-out darts visit with automatic bust handling.
Enter up to three throws in order. S, D and T mean single, double and treble; SB = 25, DB = 50 and 0 = miss. Going below zero, leaving one, or reaching zero without a double busts the whole visit. The next player then throws; remove any extra darts entered after a bust or checkout. This is a single-visit scorer, not a match manager or double-in variant.
Next: Board game score calculator
A worked example
Example inputs: score before this visit = 501, darts thrown in order = T20, T20, T20. Score remaining = 321.
Before you use the result
Enter up to three throws in order. S, D and T mean single, double and treble; SB = 25, DB = 50 and 0 = miss. Going below zero, leaving one, or reaching zero without a double busts the whole visit. The next player then throws; remove any extra darts entered after a bust or checkout. This is a single-visit scorer, not a match manager or double-in variant.
Example results for score before this visit
These examples use Darts thrown in order: T20, T20, T20. They are reference calculations, not recommended settings.
Score before this visitScore remaining
501321
1002822
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ToolOctopus. “Darts calculator.” Updated 2026-09-26. https://tooloctopus.com/darts-calculator.
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