ganak.appDarts Checkout Calculator
Free darts checkout calculator. Instantly find the best 3-dart finish for any score from 2 to 170 (double-out) or up to 180 (master-out, straight-out). Supports all three out rules. Includes backup routes, alternative finishes, and a dart-by-dart breakdown with route explanations.
Recommended Checkout3-dart finish
The mathematically optimal finish for 170 with 3 darts
Remaining Score
170
What Is a Darts Checkout Calculator?
Your game-time assistant for finding the optimal finish in 501 and 301 darts
A darts checkout calculator instantly finds the best 3-dart, 2-dart, or 1-dart finish for any remaining score from 2 to 170 under standard double-out rules (up to 180 for master-out and straight-out). Instead of memorizing a static checkout chart or fumbling through a printed table mid-game, you enter your score and see the recommended checkout path — dart by dart.
3-Dart Finishes
Complete checkout routes for scores 101–170 (double-out) or up to 180 (master/straight-out)
Backup Plans
What to throw if your first treble hits a single — stay in control
Route Ranking
Routes ranked by fewest darts first, D16 preference, and T20 priority
In standard 501 darts, you must finish on a double (or bullseye) to win. This is called double-out. The calculator shows you which trebles to aim for and which double to finish on. Routes are ranked by fewest darts first, then by finishing double quality (D16 is safest), and finally by treble preference (T20 first is most practiced).
How Are Checkout Routes Chosen?
The strategy behind the recommended finishes, developed over decades of professional darts
The calculator ranks every mathematically valid checkout route using preference rules refined through decades of professional darts:
D16 Preference
Double 16 is the safest double — miss inside and you still have D8, D4, D2, and D1.
T20 First Dart
Treble 20 is the most practiced target in darts, leveraging your muscle memory.
Biggest Trebles
Routes using T20, T19, and T18 are preferred — bigger targets, more practice.
Fewest Darts First
1-dart finishes always beat 2-dart, which beat 3-dart. Shorter paths to the double win.
Example: 77 Remaining
Two common routes exist for 77, but only one has a clean backup:
T15 → D16
S15 miss leaves 62 — awkward
T19 → D10
S19 miss leaves 58 → S18, D20
The calculator prefers T19 → D10 because T19 (57) ranks higher than T15 (45) in treble quality. D10 is also a solid double — the calculator's D16 preference applies to 3-dart finishes where setup quality is equal.
The Bogey Numbers
Seven scores that are mathematically impossible to finish in 3 darts under double-out rules
159
Bogey
162
Bogey
163
Bogey
165
Bogey
166
Bogey
168
Bogey
169
Bogey
These are called bogey numbers. If you leave yourself on a bogey number, your opponent gets another turn while you scramble to set up a finishable score. Knowing these numbers helps you plan your setup darts — avoid leaving 159, 162, 163, 165, 166, 168, or 169 at all costs.
Pro tip: Top players know these cold. When approaching a finish from 200+, they intentionally target trebles that leave a finishable number. For example, from 229, a T20 (60) leaves 169 — a bogey. So they'd throw T19 (57) instead, leaving 172, then another scoring dart to reach a finishable number.
Iconic Checkout Routes
The most famous finishes in darts — every player should know these
The Big Fish
T20 → T20 → Bull
The highest double-out checkout. Two treble 20s and the bullseye. Under master-out or straight-out, 180 (T20, T20, T20) is the maximum.
The Ton-67
T20 → T19 → Bull
Second-highest checkout. Requires two trebles and a bullseye finish.
Ton-64
T20 → T18 → Bull
Third-highest. T20, T18, Bull. Seen regularly in televised matches.
Ton-61
T20 → T17 → Bull
Fourth-highest. The last of the "big" bullseye finishes.
Ton-60
T20 → T20 → D20
The highest finish ending on a regular double. Very achievable.
Classic D16
T20 → T20 → D16
Ends on the most popular double in darts. Miss inside and you still have D8, D4, D2.
Gross
T20 → T20 → D12
Three twelves: T20 (60) + T20 (60) + D12 (24) = 144.
Bull-Bull-D16
Bull → Bull → D16
An unusual but effective route when your opponent is on a finish.
Checkout Strategy Tips
Practical advice to improve your finishing game
Always know your backup route
Before you step to the oche for a finish, know what you'll do if your first dart hits a single instead of a treble. The calculator shows the backup plan — memorize it.
The D16 advantage
Double 16 is the safest double on the board. If you hit inside, you get D8 (still a finish). Miss inside D8, you get D4. Then D2, then D1. This split-chain makes D16 the most popular checkout double in professional darts.
Set up your finish, don't just score
When you're approaching 170, think about what score your next three darts should leave. Don't blindly throw at T20 — a 140 leaves 163 (bogey) from 303. Throw T19 instead.
Practice the common finishes
Scores like 40 (D20), 32 (D16), 36 (D18), 24 (D12), and 20 (D10) come up constantly. Being automatic on these doubles wins legs. Use the calculator to drill the less common finishes.
3 darts, 2 darts, 1 dart — different strategies
With 3 darts, you can target trebles aggressively. With 2 darts, you're setting up a double. With 1 dart under double-out you can only finish on a double or bullseye; master-out also allows trebles; straight-out allows any segment including singles.
Frequently Asked Questions
Common questions about darts checkouts and finishes
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Last updated May 7, 2026