MMA Judging Calculator

The calculator compares the two fighters' weighted composite scores; if the absolute difference is 2.5 or more (on the 1-10 per-criterion scale after weighting), the round is scored a dominant 10-8. Anything between 0.3 and 2.5 is a standard 10-9, and a gap under 0.3 is scored a rare 10-10. This threshold-based approach mirrors how real judges are instructed to reserve 10-8 for rounds where one fighter clearly dominated across the criteria, not just narrowly edged the other out.

The ABC's Unified Rules of Mixed Martial Arts instruct judges to evaluate effective striking/grappling first, and only fall back on fighting-area control and effective aggressiveness as tiebreakers once striking/grappling is judged even between the two fighters — control outweighs aggressiveness in that tiebreaker order. This calculator turns that priority order into fixed weights (striking 35%, grappling 30%, control 20%, aggression 15%) so every criterion always contributes to the score rather than only kicking in when the top criterion is tied; it's a simplification of the rulebook's tiebreaker structure, not a literal restatement of it. Being purposefully aggressive without landing anything meaningful still scores lowest of the four criteria either way.

After. The engine first determines each fighter's round score from the composite comparison (10, 9, or 8), and only then subtracts the entered deduction (0-3) from the affected fighter's score. So a fighter who otherwise won a round 10-9 but had 1 point deducted for a foul would end up scored 9-9 for that round, matching how a real referee-ordered deduction is applied in scoring.

The calculator only takes one round's worth of criteria scores as input, then multiplies that single round's score by the number of rounds to get a total — it has no way to know if a fighter's performance changes round to round. This makes the total score and winner outputs useful for sanity-checking a single round's scoring or understanding criteria weighting, but not a real full-fight prediction if you expect the fight's momentum to shift.

Dominance index takes the absolute score differential across all projected rounds and expresses it as a percentage of the maximum possible spread — every round scored 10-8, or numRounds × 2 points. A dominance index near 100 means the scoring is about as lopsided as a fight can get under this system, while a low index means the fight is closely and evenly scored between the two fighters.