Winning Percentage Calculator
If you want to know how good the last season really was for your favorite baseball or hockey team, you should definitely give this winning percentage calculator a try. All you have to do is input the number of wins, losses, and ties on the team's record, and you'll have an answer in a split second!
💡 Click on the Advanced mode
button under the calculator to include tied games and to assign their value.
Win percentage formula
Calculating the winning percentage is equivalent to estimating a proportion of wins in the total number of games. You can check Omni's proportion calculator to learn more about proportions. If there are no tie results, you need to divide the number of wins by the total number of games (wins and losses):
winning percentage = wins / games
For example, let's assume that your favorite basketball team has played 82 games and won 48 of them. Their winning percentage is:
(48 / 82) × 100 = 58.54%
How to calculate winning percentage with ties
If, on the other hand, you want to include ties into the whole calculation, the formula gets a bit more complicated. It is usually assumed that a tie is worth the same as 1/2 of a win. In such a case, you can use our percentage calculator or evaluate the percentage by hand in the following way:
winning percentage = (wins + 0.5 × ties) / games
For this equation, the number of games is the sum of win, loss, and tie results on the team's record.
To get a better understanding of this formula, let's consider the following example: a football team playing in the National Football League has played 16 games in total. They lost 4 of them and got a tie result in 5. What is their winning percentage?

Determine the number of wins. If the total number of games is 16, then you can use the formula below:
wins = games  ties  losses = 16  5  4 = 7

Now, you know that the team has won 7 games during the last season. Add that number to half of the tie results:
wins + 0.5 × ties = 7 + 0.5 × 5 = 9.5

Divide the number you got by the total number of games:
(9.5 / 16) × 100 = 59.38%

59.38% is the winning percentage of the football team you cheer for. Quite good, but still not enough to win the League!
🙋 We use percentages in almost all aspects of our life, not just sports. For example, we can also use percent to express the relative error between the observed and true values in any measurement. To learn how to do that, check our percent error calculator.
Should you bet on this team?
Even if your favorite team has a stellar track record and a winning percentage oscillating around 80%, it doesn't necessarily mean they will win the next match! Instead of calculating the win percentage, you should use our odds calculator to determine your chances when betting on them.
FAQ
How many games did a team win if they won 40 percent of the 15 games?
They won six games. To evaluate the result, you need to multiply the winning percentage by the number of games: 40% × 15 = 6.
How do I calculate the percentage of games won?
To estimate the percentage of games won:
 Get the number of games won.
 Get the total number of games.
 Divide the first value by the second one.
 Multiply the quotient by 100.
 The result is the percentage of games won.
How do I calculate the win/loss ratio?
To calculate the win/loss ratio:
 Get the number of won games.
 Get the number of lost games.
 Divide the first value by the second one. We assume there is at least one game lost.
 Multiply the quotient by 100.
 The result is your win/loss ratio.
What are the percentage odds of winning the lottery?
There is a 1 in 13,983,816 (or about 0.00000715%) chance for a win, assuming you need to pick 6 numbers out of the set of 49 possibilities. However if 5 of 49 satisfies the winning condition; the odds change to 1 in 1,906,884 (or about 0.0000524%).
To estimate such probabilities, divide one over the combination of the corresponding values, e.g., 1/C(49,6)
in the first case.