Bridge Scoring Calculator

Bridge scoring has three layers: trick points (the raw score for each trick bid and made), bonuses (for game, slam, or partscore), and penalties (for undertricks when a contract fails). The calculator above handles all of them automatically for both duplicate and rubber bridge.

Duplicate bridge scoring is cumulative per board. Every made contract earns trick points plus either a partscore bonus (+50) or a game bonus (+300 non-vulnerable, +500 vulnerable). Reaching and making a slam adds a further bonus on top of the game bonus. At the end of a session, all board scores are compared across the field via matchpoints or IMPs.

Rubber bridge scoring splits into above-the-line and below-the-line points. Trick points from bid-and-made contracts go below the line (counting toward game). Bonuses, overtrick premiums, and penalties all go above the line. The first side to win two games wins the rubber and collects a rubber bonus.

Vulnerability changes the stakes dramatically. Vulnerable game bonuses are 500 vs. 300 non-vulnerable. But vulnerable undertricks are also doubled: −100 per trick vs. −50. The risk/reward calculation shifts every time vulnerability changes.

Doubled contracts double the trick value if made (plus a +50 insult bonus), but drastically increase penalties if defeated. Redoubled contracts quadruple the trick value. A redoubled 7NT making vulnerable is worth 7,600 points — the highest possible duplicate bridge score.