Single Elimination Bracket Generator - 4 to 128 Teams
Generate a single elimination bracket instantly. Lose once and you are out. Handles byes automatically for any team count from 4 to 128. No signup required.
Single Elimination in Plain English
How It Works
- -Teams are seeded and placed in a bracket
- -Each match has a winner and a loser
- -The loser is immediately eliminated
- -Winners advance to the next round
- -This repeats until one team remains - the champion
Key Formulas
Total Matches
N - 1
16 teams = 15 matches
Total Rounds
ceil(log2(N))
16 teams = 4 rounds
Byes Needed
next_power_of_2(N) - N
10 teams = 6 byes (pad to 16)
When to Use Single Elimination
Good For
- - Large fields (16+ teams) where time is limited
- - One-day tournaments with tight schedules
- - March Madness, NFL playoffs, World Cup knockout round
- - Casual events where the drama of elimination is the point
- - Any event where the champion is more important than ranking all teams
Not Ideal When
- - Small fields (4-6 teams) where one upset is too decisive
- - Players paid entry and expect guaranteed games
- - You need to rank all participants, not just crown a winner
- - Competitive play where a bad day should not end the tournament
Single Elimination Quick Reference
| Teams | Rounds | Matches | Byes |
|---|---|---|---|
| 4 | 2 | 3 | 0 |
| 8 | 3 | 7 | 0 |
| 10 | 4 | 9 | 6 |
| 12 | 4 | 11 | 4 |
| 16 | 4 | 15 | 0 |
| 20 | 5 | 19 | 12 |
| 32 | 5 | 31 | 0 |
| 64 | 6 | 63 | 0 |
FAQ
How many matches in a single elimination tournament?
Exactly N-1 matches where N is the number of teams. An 8-team bracket has 7 matches total. Every team plays at least once and loses exactly once, except the champion.
How many rounds in a single elimination bracket?
The number of rounds equals ceil(log2(N)). An 8-team bracket has 3 rounds (quarterfinals, semifinals, final). A 16-team bracket has 4 rounds. A 32-team bracket has 5 rounds.
How do byes work in single elimination?
When the team count is not a power of 2, byes are added to pad the bracket to the next power of 2. The top seeds receive byes and automatically advance to round 2 without playing. A 6-team bracket becomes an 8-slot bracket with byes for the top 2 seeds.
Who gets byes in a single elimination bracket?
By convention, the highest-seeded (best-ranked) teams receive byes. Seed 1 gets a bye first, then seed 2, and so on. This rewards regular season performance and is standard practice in most official tournaments.