Tournament Calculator
Tournament Setup
Show the math
Tournament Format
Tournament Bracket & Schedule
Single elimination: rounds = ceil(log2(teams)), matches = teams − 1. Round robin: every team plays every other, matches = teams × (teams − 1) ÷ 2. Double elimination adds a losers bracket. Related: trivia, triathlon pace.
What Your Result Means
- Total games: The number of matches required to determine a winner under your chosen format. Single elimination needs the fewest games; round robin the most.
- Total rounds: How many rounds of play are needed. This helps you plan the event schedule and venue time.
- Bye count: Teams that automatically advance in the first round because the field isn't a perfect power of two. Byes are typically awarded to the highest-seeded teams.
- Total players: The headcount across all teams, useful for planning logistics like registration, meals, and venue capacity.
How This Calculator Works
You enter the number of teams, players per team, and tournament format. For single elimination, total games equal teams minus one and rounds equal the ceiling of log-base-2 of team count. Round robin schedules every possible pairing. The tool generates bracket visualizations and match schedules automatically.
Quick Questions
When should I use single vs double elimination?
Single elimination is faster and simpler but a single bad game can knock out a strong team. Double elimination gives every team a second chance through the losers bracket, making it fairer but roughly doubling the number of games.
How are byes assigned in a bracket?
Byes are typically given to the highest-seeded teams so they automatically advance to the second round. The number of byes equals the next power of two minus the number of teams.
What is the best format for a small group (6–8 teams)?
Round robin works well for small groups because every team plays everyone else. For 8 teams that is 28 games across 7 rounds, which is manageable for a one-day event. If time is tight, single elimination with 8 teams needs only 7 games.
How does round robin with playoffs work?
Teams are split into pools and play a round robin within each pool. The top finishers from each pool then advance to a single-elimination playoff bracket. This balances fairness (multiple games) with excitement (knockout rounds).
Sources
- Wikipedia — Tournament (Knockout) (single and double elimination formats)
- Wikipedia — Round-Robin Tournament (scheduling algorithms, berger tables)
Method & review
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.