Calculate your 3-dart average and look up the recommended checkout for any remaining score.
3-dart average = total points scored / number of legs × 3; checkout is the recommended finish for the remaining score.
Scoring 501 points in 21 darts gives a 3-dart average of about 71.6.
The average points scored with three darts, the standard measure of playing strength in 501.
The calculator looks up the recommended finish—often ending on a double—for the remaining score.
A score that cannot be finished in three darts, like 169; the calculator flags these.