Why must a darts checkout end on a double?

In standard 01 games (501, 301) you must reduce your score to exactly zero with the final dart landing in a double segment or the 50-point bullseye, which counts as a double.

What are bogey numbers in darts?

Bogey numbers cannot be finished in three darts: 169, 168, 166, 165, 163, 162 and 159. The calculator flags these so you know to leave a different number on your next-to-last visit.

What is the highest possible checkout?

170 is the maximum three-dart finish: treble 20 (60), treble 20 (60) and bullseye (50). Any remaining score above 170 cannot be checked out in three darts, so you must score down to 170 or less first.

Does the bullseye count as a double?

Yes. The 50-point bullseye is the centre double and is a legal finishing target, so 50, 40, 36 and similar even totals can be closed on the bull or an outer double ring segment.

Can a score be finished in one dart?

Yes, if the remaining score equals a single double: any even number from 2 to 40 (double 1 to double 20) or 50 (bullseye). For example, 32 is checked out with a single double 16.

Why does the route sometimes start with a treble?

For three-dart finishes the calculator searches highest-value darts first, so it favours scoring trebles early to leave a clean double. The shown route is one valid finish, but other equally legal routes often exist.

Is my play data uploaded?

No — the checkout is computed entirely in your browser and nothing is sent anywhere.

Darts Checkout Calculator

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.

Example

You have 170 left, the highest possible checkout:

Dart 1: T20 → 170 − 60 = 110
Dart 2: T20 → 110 − 60 = 50
Dart 3: Bull (50) → 50 − 50 = 0 ✓ (the bull is a double)

Remaining	Suggested finish
170	T20 → T20 → Bull
100	T20 → D20
40	D20
32	D16
167	bogey-adjacent; 167 = T20 → T19 → D25 (Bull)

Everything runs in your browser — nothing is sent anywhere.