In short: a professional MMA fight usually has 3 rounds of 5 minutes; title and main-event fights are often scheduled for 5 rounds. A fight is won by knockout, technical knockout, submission or decision. Judges score each round with the 10-point must system. Many major organisations use the Unified Rules of MMA as their basis (here: the version with the July 2024 changes, edition of August 2025).
Rounds and rest
- Every professional round lasts 5 minutes, with 1 minute of rest in between.
- The Unified Rules allow bouts of 1 to 5 rounds, 25 minutes at most.
- 3 rounds is the usual format. Title and main-event fights are mostly scheduled for 5 rounds — that is set by the organisation, not by the rules.
How a fight ends
| Result | What happens |
|---|---|
| KO (knockout) | A fighter is knocked unconscious by a strike or cannot continue. |
| TKO (technical knockout) | The referee stops the fight because a fighter can no longer defend himself or herself intelligently — or the doctor or the corner ends it. |
| Submission | A fighter gives up after a joint lock or choke (tap or verbal) — or is choked unconscious. |
| Decision | The fight goes the full distance and three judges decide. |
| Disqualification | After serious or repeated fouls. |
| No contest | An accidental foul causes an injury that ends the fight before half of the scheduled rounds are over. After that, the fight goes to the scorecards (technical decision). |
Decisions
Three judges score every round. The round winner gets 10 points, the loser 9 or fewer: 10-8 for clear dominance, 10-7 extremely rarely. A completely even round can be scored 10-10.
- Unanimous: all three judges pick the same winner.
- Split: two judges for A, one for B.
- Majority: two judges for A, one scores a draw.
- Draw: no winner — that is why some records have a third number, e.g. 28-8-1. There are unanimous, majority and split draws.
Scoring follows a fixed order: effective striking and grappling count first (impact of strikes, takedowns, submission attempts, better positions). Only if that is even does effective aggressiveness count (serious attempts to finish the fight), and only then control of the fighting area (who dictates pace, place and position).
What is illegal (selection)
- Head butts
- Eye gouging, biting, pulling hair
- Groin attacks of any kind
- Strikes to the back of the head and the spine
- Deliberate strikes to the throat and grabbing the trachea (a strike that happens to land on the neck while standing is legal)
- Twisting small joints (fingers, toes)
- Holding the cage (with fingers or toes) and holding the opponent's shorts or gloves
- Knees and kicks to the head of a "grounded" opponent
- Stomping a grounded opponent
When is a fighter "grounded"?
Since the 2024 rule change, a fighter counts as grounded as soon as any body part other than the hands or feet touches the mat. Hands and feet alone are not enough: then the head can legally be kneed or kicked. Also changed: 12-6 elbows (straight down) are no longer listed as a foul in the current version.
Weight classes
Fights take place in fixed weight classes. The Unified Rules list classes from atomweight (up to 105 lb) to super heavyweight (over 265 lb). In practice, organisations use a subset, usually from strawweight (52.2 kg) to heavyweight (120.2 kg). You will find every limit in our overview of the MMA weight classes.
Do organisations differ?
Yes, in the details. Most major organisations follow the Unified Rules, but individual rules can differ. The rulebook of the respective organisation and the responsible athletic commission always applies.
Frequently asked questions
How long is an MMA fight? Usually 3 rounds of 5 minutes, title and main-event fights mostly 5 rounds, plus 1 minute of rest between rounds.
What does TKO mean? Technical knockout: the referee (or doctor or corner) ends the fight because a fighter can no longer defend adequately.
What is a submission? A win by tap-out after a joint lock or choke.
What does 10-9 mean in MMA? The round winner gets 10 points, the loser usually 9.
Source: Unified Rules of Mixed Martial Arts (Association of Boxing Commissions), amended 23 July 2024, edition of 6 August 2025.