Short answer: four players per table is standard. When your count doesn't divide evenly by four, the common practical fallback is one or more tables of three — not a different game, just a smaller table. This is seating logistics, not an official Mahjong rule, and your own event's policy on substitutes and 3-player tables always takes precedence.
1. Start with the standard: four to a table
American Mahjong is built around four players at a table. For any headcount that divides evenly by four, the plan is simple: one table per group of four. The planning question only gets interesting once your RSVPs don't land on a clean multiple of four — which, for most recurring groups, is most weeks.
2. When the count doesn't divide evenly
There are three practical ways organizers commonly handle a leftover player or two:
Three common approaches
- One or more tables of three. The most common fallback — a smaller table plays a complete game, just with one fewer player.
- A rotating sit-out. With one extra player, a table of 4 runs with a 5th person rotating in each round, so everyone plays roughly the same amount.
- A waitlist or late-add table. For classes and casual nights, holding one player in reserve until a 4th (or 3rd) arrives keeps tables from running short all evening.
Which one is right depends on your setting. A beginner class can usually absorb a rotating sit-out without friction. A scored tournament needs its 3-player-table and bye policy decided and published in advance, since it directly affects standings.
3. Quick-reference table, 4 to 20 players
| Players | Table split |
|---|---|
| 4 | 1 table of 4 |
| 5 | 1 table of 4, 1 player rotating in |
| 6 | 2 tables of 3 |
| 7 | 1 table of 4 + 1 table of 3 |
| 8 | 2 tables of 4 |
| 9 | 3 tables of 3 |
| 10 | 1 table of 4 + 2 tables of 3 |
| 11 | 2 tables of 4 + 1 table of 3 |
| 12 | 3 tables of 4 |
| 13 | 1 table of 4 + 3 tables of 3 |
| 14 | 2 tables of 4 + 2 tables of 3 |
| 15 | 3 tables of 4 + 1 table of 3 |
| 16 | 4 tables of 4 |
| 17 | 2 tables of 4 + 3 tables of 3 |
| 18 | 3 tables of 4 + 2 tables of 3 |
| 19 | 4 tables of 4 + 1 table of 3 |
| 20 | 5 tables of 4 |
For any other headcount — including events well past 20 players — the free Mahjong Table Calculator runs the same math and gives you a shareable link to the result.
4. Decide this before people arrive
The table split itself takes thirty seconds to work out. The friction happens when it's worked out live, at the door, with people already standing around waiting for an answer. Post or print the table assignments before the first guest arrives, and have a stated plan for what happens if the actual headcount differs from your RSVP count — someone always has to confirm, cancel or show up unannounced.
Calculator and related tools
Use the Mahjong Table Calculator for one-off table math. For a multi-round tournament, the Round Planner adds round and game-count structure on top of the same table split. For live, fairness-audited seating with dropout handling across an entire event, Tournament Flow generates the actual assignments in your browser.
Original MahjongTableFlow operational guidance. This is seating logistics, not an official Mahjong rule — your own event's or club's policy on substitutes and 3-player tables governs.
