Sport hub
Judo tournament planning
Tools and guides for judo tournament organisers. From quick match count estimates to detailed planning guides for IJF competition systems, repechage and weight category management.
Tools
Bracket calculator
Enter competitor count and IJF ruleset to get match count, rounds, repechage matches and total event duration.
Open calculatorRules summaries
Planning notes for IJF Senior, IJF Junior, Swedish Judo Federation and USA Judo rulesets, with official source links.
Browse rulesGuides
Judo tournament guide
Weight categories, IJF competition systems, repechage, mat requirements, draw procedure and duration estimates.
Repechage explained
How IJF full repechage works, how it differs from quarter-final repechage, and how it affects your match count.
How to run a tournament
Step-by-step from first planning decisions to final results, applicable to judo and most combat sports.
Estimating tournament duration
How to calculate total time including changeovers, mats in parallel, and buffer for repechage phases.
Quick reference
| Entries per category | System | Approx. matches |
|---|---|---|
| 3–5 | Round robin pool | 3–10 |
| 8 | Single elim + repechage | 9–11 |
| 16 | Single elim + repechage | 19–21 |
| 32 | Single elim + repechage | 39–43 |
Use the calculator for exact numbers based on your ruleset and mat count.