What this calculator does
Add up the judges' scorecards for a boxing match and see who won, and how. In professional boxing, three judges each fill in a card, one round at a time. They use the 10-point must system: the boxer who wins a round gets 10 points, and the other gets 9 or fewer. At the final bell, the cards are added up. Any points the referee took away for fouls come off. The result depends on how many of the three cards favour each boxer. This calculator does all that adding up for you.
Type each judge's card as a line of round scores, such as 10-9 9-10 10-8. Or use the shorthand R, B and E. The calculator totals every card, takes off deductions and shows a round-by-round grid. Then it names the outcome: a unanimous, split or majority decision, or a unanimous, split or majority draw. Switch to one card to keep your own score from the couch. Then compare it with the official cards afterwards.
Where it's used
Why this math matters outside the classroom:
- Scoring from the couch. A fan keeps a card during a 12-round fight and adds the rounds: 7 rounds at 10 and 5 at 9 make 70 + 45 = 115.
- Checking a broadcast graphic. Viewers total the round scores shown after a fight to confirm a 115-113 card adds up from twelve rounds of 10s, 9s and an 8.
- Boxing gym sparring. Coaches at a club scorecard sparring sessions round by round so young boxers can see which rounds they lost and why.
- Judging practice. Trainee judges compare their cards with those of experienced officials, round by round, to see where their scoring differs.
- Classroom addition. Teachers use scorecards for addition practice: summing twelve two-digit round scores gives a total between 72 and 120.
Grade level and standards: Grade 3; Common Core State Standards for Mathematics 3.NBT.A.2. © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
How to use it
- If you like, replace Red corner and Blue corner with the boxers' names. Names only label the results.
- Choose three judges for an official-style result, or one card to score a fight yourself.
- Type each judge's rounds in order, with red's score first. 10-9 means red won the round, 9-10 means blue did, 10-8 is usually a knockdown round and 10-10 is even. R, B, R+ and E are shorthand for 10-9, 9-10, 10-8 and 10-10.
- Enter the total points taken from each boxer for fouls. Then read the result, each card and the round grid.
What the inputs mean
- Red corner
- A name for the label only; it never changes the score. Blank shows "Red corner".
- Blue corner
- A name for the label only; it never changes the score. Blank shows "Blue corner".
- Judges
- Official fights use three judges. One card is for scoring a fight yourself. A single card is either a win for one boxer or a draw.
- Judge 1, round by round
- Separate rounds with spaces or commas. Each R or B is a 10-9 round. Add a + for each extra point, so R+ is 10-8 to red and B++ is a 10-7 round for blue. Every judge must score the same number of rounds, up to 12.
- Judge 2, round by round
- One score per round, red first: 10-9, 9-10, 10-8, 10-10. Shorthand: R or B for a 10-9 round, R+ for 10-8, E for 10-10.
- Judge 3, round by round
- One score per round, red first: 10-9, 9-10, 10-8, 10-10. Shorthand: R or B for a 10-9 round, R+ for 10-8, E for 10-10.
- Points deducted from red
- Points the referee took away for fouls, such as low blows or holding, added up for the whole fight. A deduction counts on every judge's card. So enter it once here, rather than lowering a round score.
- Points deducted from blue
- Total for the fight; it comes off every judge's card.
Formula and method
round: winner 10, loser 9 or fewer (10-10 if even) card total = sum of the round scores − points deducted 3 cards for one boxer = unanimous decision 2 cards for one boxer, 1 for the other = split decision 2 cards for one boxer, 1 even = majority decision 1 card each way and 1 even = split draw; 2 even = majority draw; 3 even = unanimous draw
A card is one judge's scores for the whole fight. Each judge scores every round on its own. A clearly won round is normally 10-9. A knockdown usually makes it 10-8. Two knockdowns, or a very one-sided round, can make it 10-7. Ten points each means the judge couldn't split them. Adding up the round scores gives the judge's card, with red's total first.
When the referee takes away a point, it comes off that boxer's total on all three cards. That's why one deduction can swing a close fight. It moves every card by a point at once.
The three cards aren't added together to decide the fight. Each card is a vote for one boxer, or for a draw, and the pattern of votes gives the result. Say a boxer wins one card by six points but loses two by one point. That boxer still loses, by split decision.
Worked example
A 12-round fight between two made-up boxers, red and blue. Red scores a knockdown in round 5, which all three judges mark 10-8. The cards are typed as R R B R R+ B R B B R R B, then R B B R R+ B B R B R B B, then R R B R R+ B R E B R B B, with no deductions.
- Judge 1 gives red 7 rounds and blue 5. Red has 7 × 10 + 5 × 9 = 115 and blue has 5 × 10 + 6 × 9 + 8 = 112, so 115-112.
- Judge 2 gives red only 5 rounds. Red has 5 × 10 + 7 × 9 = 113 and blue has 7 × 10 + 4 × 9 + 8 = 114, so 113-114 for blue.
- Judge 3 gives red 6 rounds and blue 5, and scores round 8 even. Red has 60 + 45 + 10 = 115 and blue has 50 + 45 + 8 + 10 = 113, so 115-113.
- Two cards favour red and one favours blue, so it's a split decision. With a 2-point deduction for red, the cards become 113-112, 111-114 and 113-113, which is a split draw.
Result: Red corner wins by split decision (115-112, 113-114, 115-113).
Understanding the result
The result line is the official-style outcome. The separate cards show how close the fight was. A 2-1 split with every card within two points was a fight either boxer could have won.
The count of rounds scored 10-8 or wider shows at a glance how often the judges saw knockdowns or one-sided rounds. The count of even rounds shows how often a judge couldn't pick a winner.
Assumptions and limitations
- The 10-point must system with three judges, as adopted by the Association of Boxing Commissions for professional boxing.
- Deductions count on every card. Partial rounds in a technical decision are entered as scored rounds.
- A round's loser gets between 6 and 9 points. Scores below 10-6 aren't accepted.
- Stoppages end a fight without the cards: a knockout (KO), a technical knockout (TKO) or a disqualification. This calculator only scores fights that go to the judges, or that are stopped for a technical decision.
- The calculator doesn't judge rounds for you. Judges apply the scoring criteria, such as clean punching and control of the ring (ring generalship). An official result always comes from the commission.
- Amateur and Olympic-style boxing score fights differently, and aren't covered.
Frequently asked questions
What's the difference between a split and a majority decision?
In a split decision, two judges score for one boxer and the third scores for the other. In a majority decision, two judges score for one boxer and the third scores the fight even. Both are wins. The majority decision just had no card for the loser.
Why is a knockdown round usually 10-8?
A knockdown is strong evidence that one boxer clearly won the round. So judges normally take an extra point from the boxer who went down. If that boxer had been winning the round otherwise, a judge may score it closer. Two knockdowns can make it 10-7.
How does a point deduction change the result?
The point comes off that boxer's total on all three cards. In the example, red wins a split decision. But a 2-point deduction for red turns the cards into 113-112, 111-114 and 113-113, and the fight becomes a split draw.
Can I use this to score a fight myself?
Yes. Choose one card and type your round scores as the fight goes on. The running total tells you who's ahead on your card. Comparing it with the official cards afterwards is a great way to spot the rounds that swung the fight.
Sources
- Association of Boxing Commissions: Unified Rules of Boxing (as amended August 3, 2016) (checked 2026-10-19)
How this calculator is checked
Method: 10-point must system under the Association of Boxing Commissions' Unified Rules of Boxing; standard decision terminology (unanimous, split and majority decisions and draws) applied to three judges' cards. The calculation is covered by automated tests with known reference values and edge cases. Last updated 2026-10-18. Found a problem? Tell us.
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