American Mahjong 2026 Scoring & Settlement Calculator

Referee-grade settlement engine for table payouts, self-draw doubles, discard liabilities, and Jokerless bonuses under official 2026 National Mah Jongg League (NMJL) rules.

Official American Mahjong Payout Principles

In American Mahjong (NMJL rules), game settlement is straightforward, fair, and based on who made the winning move:

  • Card Base Value: Standard exposed hands (X) score 25 points; concealed (C) hands score 30–35 points; Quints score 40–45 points; Singles & Pairs score 50 points.
  • Self-Drawn from Wall: All 3 opponents pay DOUBLE (2x) the base points.
  • Called on a Discard: The specific discarder pays DOUBLE (2x); the other two opponents pay SINGLE (1x).
  • Jokerless Double: If a hand that normally permits Jokers is achieved with natural tiles only, the entire payout is DOUBLED again.
  • Third Exposure Liability: If an opponent shows 3 exposures matching only 1 possible hand on the card and you discard the hot tile, you pay the entire table's score alone.

Example Settlement Calculations

  • 25-Point Hand via Discard: Discarder pays 50 pts (or 50¢); Opponents 2 and 3 pay 25 pts each. Winner receives 100 pts ($1.00).
  • 25-Point Hand Self-Drawn: Opponent 1, 2, and 3 each pay 50 pts (2x). Winner receives 150 pts ($1.50).
  • 25-Point Hand Jokerless Self-Drawn: Base becomes 50 pts (2x Jokerless). Each opponent pays 100 pts (2x self-draw). Winner receives 300 pts ($3.00).
  • 50-Point Singles & Pairs Self-Drawn: Each opponent pays 100 pts. Winner receives 300 pts ($3.00).