How does a mixed martial arts fight work?
B · Beginner · The fight · 1 of 6Mixed martial arts lets two fighters strike and grapple, standing or on the ground, inside a cage or a ring. A fight is won by knockout, by the referee stopping it, by making the opponent submit or on the judges' scorecards if it goes the distance. A list of 26 fouls sets the limits.
How it works
- Striking: punches, kicks, knees and elbows, standing or on the ground.
- Grappling: takedowns, throws, positions on the ground and submission holds.
- Rounds: five minutes each, with one minute between.
- Knockout or technical knockout: the referee stops the fight because a fighter cannot, or does not, defend intelligently.
- Submission: a fighter taps, says they give up or is put out or injured by a legal hold.
- Decision: three judges score every round, and their cards decide a fight that reaches the end.
- Fouls: 26 are listed, and they can cost points or the fight.
- Who is in charge: the referee, alone.
The glossary has the cage, the bout, the KO, the submission, the decision and the foul.
Tricky cases
Is everything allowed in MMA?
No. The rules list 26 fouls, among them headbutts, eye gouging, biting, groin strikes and strikes to the spine or the back of the head.
Can a fight be stopped while a fighter is still conscious?
Yes. The referee stops the fight when a fighter is not intelligently defending. That is a technical knockout.
Does a fight have to take place in a cage?
No. The rules provide for a cage or a ring, and have a rule for a fighter knocked out of a ring.
Are these the rules of every MMA event in the world?
No. They are the rules agreed by the association of North American athletic commissions, and each commission adopts them by its own vote. Promotions elsewhere, and amateur bodies, may use different rules, which are not saved here.
Why the rule exists
The sport began as a test of one fighting style against another with very few rules. The unified rules were written by athletic commissions so that the contest could be licensed and regulated: timed rounds, weight classes, gloves, judges and a list of fouls. They keep the open mix of techniques and take out the acts most likely to maim.
Where it differs
| Where | What changes | Source |
|---|---|---|
| Unified rules | Five-minute rounds; 26 fouls; ten-point must scoring | ABC Rule 1; Fouls; Judging criteria |
| A ring, not a cage | A fighter knocked out of it has five minutes to return unassisted | ABC Rule 5 |
| Other promotions and amateur bodies | Their own rules | Not saved |
| Boxing | Punches only, above the waist | C |
From the rule book
Association of Boxing Commissions and Combative Sports, Unified Rules of Mixed Martial Arts (as amended 23 July 2024; California State Athletic Commission copy), rules 1 to 5, the fouls list, the judging criteria and the types of decisions. Checked 14 October 2026. Official document: the association's Unified Rules of Mixed Martial Arts (adopted commission by commission).