How this calculator works
A simple winning percentage is wins divided by wins plus losses. When ties exist, each tie is credited with a fraction of a win and the denominator becomes all games played. A tie value of 0.5 treats a tie as half a win and half a loss, which is common in baseball and football standings. A value of 0 counts ties as neither wins nor losses in the numerator but still counts them in the denominator, while a value of 1 counts a tie as a full win. Choose the convention used by your league.
Formula
Winning percentage = (wins + ties x tie value) / (wins + losses + ties). Solving for wins: (percentage x (losses + ties) - ties x tie value) / (1 - percentage). Solving for losses: (wins + ties x tie value) / percentage - wins - ties.
Worked example
A team with 10 wins, 5 losses and 2 ties, with ties worth half a win, has (10 + 2 x 0.5) / (10 + 5 + 2) = 11 / 17 = 0.6471, or 64.71 percent. Ignoring the ties would give 10 / 15 = 66.67 percent, which overstates the record.
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Frequently asked questions
What value should a tie have?
It depends on the league. Half a win is common where standings award one point for a tie. Some leagues treat a tie as half a win and half a loss, which is the same thing; others replay the game or exclude it from the record.
Why is the percentage not just wins divided by games?
That is the special case where ties are worth nothing. The general formula credits part of a tie as a win, which changes both the numerator and, through the denominator, the share of the season it represents.
Can a winning percentage exceed 100?
No. If ties are credited at 1, a record with any losses still cannot exceed 100 percent, and the page rejects a target above 100 percent when solving backwards.