learn.howToCalculate
learn.whatIsHeading
A tournament bracket calculator determines the number of rounds, games, and byes needed for any size single-elimination tournament. Single elimination is the most common format in sports and esports.
公式
matches = participants - 1; rounds = log2(participants) (for single elimination)
- N
- Participants (number) — Number of players/teams
- matches
- Total matches (matches) — Games to determine a winner
- rounds
- Rounds (rounds) — Number of stages (each halves field)
ステップバイステップガイド
- 1Rounds = ceil(log₂(number of teams))
- 2Total games = number of teams − 1 (one team is eliminated per game)
- 3Byes = 2^rounds − number of teams (given to top seeds in round 1)
- 4A 16-team bracket has exactly 4 rounds and 15 games
解いた例
入力
8 teams
結果
3 rounds, 7 games, 0 byes
入力
16 teams
結果
4 rounds, 15 games, 0 byes
入力
12 teams
結果
4 rounds, 11 games, 4 byes (for top 4 seeds)
よくある質問
How many matches for 16 players?
15 matches (16 - 1). 4 rounds: 8 → 4 → 2 → 1 winner.
What if the number isn't a power of 2?
Add byes (free passes). Example: 10 players = 6 byes, 4 in first round. Still need 9 matches total.
What is double elimination?
Losers bracket in addition to winners bracket. Participants eliminated after 2 losses. Requires ~2× more matches.
計算する準備はできましたか?無料の Tournament Bracket Size 計算機をお試しください
自分で試してみる→