Pull the final contract from the bidding box, set doubled and vulnerable if they apply, then add the result. The score lands on the traveler with every line of the arithmetic under it.
Bidding box: tap the final contract
Result: over or under the contract
Three layers, added together. Tap a contract and watch which layers switch on.
You score for the tricks you bid above the first six. Minors pay 20 a trick, majors 30, notrump 40 for the first and 30 after that. Tap a cell.
The bonus depends on how high you bid and whether you are vulnerable. Flip the switch and watch the numbers change.
In duplicate, the board sets vulnerability before anyone picks up a card. Tap a board number to see the dealer and who is vulnerable.
A double raises the stakes both ways. Make it and you collect extra. Go down and the penalties climb a ladder. Slide to see the ladder.
| Down | Undoubled NV | Undoubled V | Doubled NV | Doubled V | Redoubled NV | Redoubled V |
|---|
Undoubled, each undertrick is a flat 50 not vulnerable or 100 vulnerable.
You do not need the whole table in your head. These four come up on most evenings. Flip each one between not vulnerable and vulnerable and watch the number move.
At a pairs game every board is worth the same. You get one matchpoint for each pair you beat on the board and half for each tie. Change any score and watch the column recompute.
| Table | NS score | Matchpoints | Percent |
|---|
At teams, your result and your teammates' result on the same board are added, and the net points are converted to International Match Points on a fixed scale.
Net points and IMPs
The IMP scale (net points to IMPs)
At a kitchen table the trick points go below the line and build up across deals until a side reaches 100 and wins a game. Bonuses go above the line. This calculator scores duplicate, not rubber.
The contracts are dealt fresh each time the page loads, so the answers cannot be memorized. Pick a score; the right one turns teal and the reason appears.
Make your contract and you score trick points for the tricks you bid, plus a bonus for a partscore, game or slam. Fail and the other side scores a penalty for each undertrick. Doubles raise both the rewards and the penalties, and vulnerability raises the bonuses and the penalties.
A contract worth 100 or more trick points. Minors pay 20 a trick, majors 30, notrump 40 then 30, so the cheapest games are 3NT, 4♥, 4♠, 5♣ and 5♦. Game earns a bonus of 300 not vulnerable or 500 vulnerable instead of the 50 partscore bonus.
3NT bid and made scores 400 not vulnerable (100 trick points plus a 300 game bonus) and 600 vulnerable (100 plus 500). Each overtrick adds 30, so 3NT making ten tricks is 430 or 630.
Doubled undertricks climb a ladder. Not vulnerable: 100 for the first, 200 each for the second and third, 300 each after that, so down one is 100, down two 300, down three 500 and down four 800. Vulnerable: 200 for the first, then 300 each. Redoubled doubles those figures.
A scoring condition set by the board in duplicate, or by having won a game in rubber bridge. Vulnerable, your duplicate game bonus, your slam bonuses and your doubled overtricks are higher, and undertricks cost more: 100 each undoubled instead of 50. Check the board before you bid.
On each board your score is compared with every other pair who held your cards. You get one matchpoint for each pair you beat and half a matchpoint for each tie. The best result on a board is a top, whether it won by 10 points or 1,000. Percentages are matchpoints divided by the maximum available.
An International Match Point, the unit used in team games. Your team's results on a board at both tables are added, and the net difference is converted with a fixed scale: 20 to 40 points is 1 IMP, a 400-point swing is 9, and 4,000 or more is 24. The scale flattens overtricks and rewards games and slams.
ACBL clubs score with ACBLscore and Bridgemate or BridgeTab terminals; for a home or small club game, DupScore on iPad scores at the table without special terminals. For a single board, BridgeScoreCalc on this page does it: pick the contract, result and vulnerability and the score appears with the arithmetic.
The scoring table is the reason good players bid the way they do. The next step is the bidding itself.
A bidding idea you can try at your next game, and now and then a story from inside the tournament world. When a new workshop or video goes up, you hear first.
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BridgeScoreCalc uses the duplicate scoring table from the Laws of Duplicate Bridge 2017. By Tracey Bauer.