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Singapore Mahjong Calculator

by Mummyz

Set up your game to begin

👤 Player Names

Player 1 — East 東 (Dealer)

Player 2 — South 南

Player 3 — West 西

Player 4 — North 北

🌳 Singapore Standard Rules

Player 1 = East 東 (Dealer, Round 1 prevailing wind)
Player 2 = South 南 | Player 3 = West 西 | Player 4 = North 北
Dealer wins → winds stay, same dealer keeps East
Any other player wins → winds rotate anti-clockwise
Flower 1 & Season 1 = East · Flower 2 & Season 2 = South · Flower 3 & Season 3 = West · Flower 4 & Season 4 = North
Round ends when all 4 players have completed a turn as Dealer (East)

💰 Scoring

1 Point = per point

Fan Cap: max fan (house rule; official = 13)

Please enter a name for every player.

Singapore Mahjong — Official Rules

Based on official Singaporean Mahjong scoring rules (148 tiles). Source: singaporemahjong.com

Tile Set (148 tiles total)

Suited tiles: 3 suits × 9 values × 4 copies = 108 (Characters 萬, Circles 筒, Bamboo 索)
Wind tiles: East 東, South 南, West 西, North 北 — 4 copies each = 16
Dragon tiles: Red 中 (Chun), Green 發 (Fa), White 白 (Pai) — 4 copies each = 12
Flower tiles: 4 tiles — Plum 梅, Orchid 蘭, Chrysanthemum 菊, Bamboo 竹 (one each)
Season tiles: 4 tiles — Spring 春, Summer 夏, Autumn 秋, Winter 冬 (one each)
Animal tiles: 4 tiles — Cat 🐱, Rat/Mouse 🐭, Rooster 🐦, Centipede/Worm 🪱 (one each)

Dealer (East) and opposite player (West) each have 19 stacks. South and North have 18 stacks. Dead wall = 15 tiles.

Hand Structure

Standard winning hand = 4 sets + 1 pair (14 tiles)

Chow (吃) — Sequence of 3 consecutive tiles, same suit only
Pong (碰) — Triplet of 3 identical tiles
Kang (杠) — 4 identical tiles; requires drawing 1 replacement tile (hand becomes 15, 16... tiles)
Bonus tiles (Flowers, Seasons, Animals) are drawn separately — never counted in the 14-tile hand
Minimum requirement: 1 point to win (起胡 qǐ-hú)

Scoring Formula

Base value doubles with each point: 1pt = 1×, 2pt = 2×, 3pt = 4×, 4pt = 8×, 5pt(Limit) = 16×

Players agree a base monetary value for 1 point before the game (e.g. S$1).

Points	Discard Win — Loser each pays	Discard Win — Shooter pays	Winner gains
1	1×	2×	4×
2	2×	4×	8×
3	4×	8×	16×
4	8×	16×	32×
5 (Limit)	16×	32×	64×

Points	Self Draw — All 3 losers each pay	Winner gains
1	2×	6×
2	4×	12×
3	8×	24×
4	16×	48×
5 (Limit)	32×	96×

Special hands (limit hands) are always paid double, regardless of self-draw or discard.

Winning Hand Fan Values

Fan	Hand Name	Description
0	Chicken Hand 鸡胡	Valid 4 sets + 1 pair, no special pattern, no value bonus tiles. Minimum 1pt required — Chicken Hand is only valid if you have 1pt from bonus tiles etc.
1	Lesser Sequence Hand 小平胡	All sequences + pair from suited tiles, but player drew flowers/animals. Counts only 1pt regardless of other bonuses.
2	Triplets Hand 碰碰胡	4 triplets/kangs + 1 pair. Mix of exposed and hidden Pongs allowed.
2	Half Flush 混一色	All tiles from one single suit PLUS any winds/dragons. Also called Mixed One Suit.
4	Full Flush 清一色	All tiles from ONE single suit only — no winds or dragons.
4	Sequence Hand 平胡	4 sequences + 1 pair. No flowers/animals drawn. Must be waiting for 2+ tiles to win (no single wait). Pair can be from any suit or non-seat/non-prevailing wind.
4	Mixed Terminals 混么九	All triplets of only 1s, 9s, winds, and dragons. Must fulfil Triplets Hand criteria (2+2=4pts).
3	Three Lesser Scholars 小三元	Pong/Kang of 2 dragons + pair of 3rd dragon.
3–4	Four Lesser Blessings 小四喜	3 wind Pong/Kangs + 1 wind pair. Score 2pts for hand + bonus for seat/prevailing winds.
4	Pure Green Suit 绿一色	Only Bamboo 2,3,4,6,8 + Green Dragon. Scores 4pts (treated as Full Flush equivalent).
Limit	Hidden Treasure 四暗刻	All 4 triplets hidden (no exposed Pong), won by Self-Draw only. Extremely rare.
Limit	Full Flush Sequence 清一色平胡	All sequences, one suit only, no flowers/animals. Awarded 10pts or limit.
Limit	Full Flush Triplets 清一色碰碰胡	All triplets, one suit only. 2+2+4=8pts or limit.
Limit	Pure Terminals 清么九	All triplets of only 1s and 9s from any suited tile set.
Limit	All Honours 字一色	All tiles from winds and/or dragons only.
Limit	Nine Gates 九连宝灯	Pure one suit: 1,1,1,2,3,4,5,6,7,8,9,9,9 + any 1 duplicate of same suit.
Limit	Three Great Scholars 大三元	Pong/Kang of all 3 dragons. Limit (or 5pts under common Singapore variant).
Limit	Four Great Blessings 大四喜	Pong/Kang of all 4 winds. Scores the limit (or 10pts under common SG variant).
Limit	Thirteen Wonders 十三幺	One each of 1m,9m,1p,9p,1s,9s,East,South,West,North,中,發,白 + any duplicate. All players pay DOUBLE the limit.
Limit	Eighteen Arhats 十八罗汉	Four Kangs declared. 18 tiles in play. Scores the limit.
Limit	Heavenly Hand 天胡	East dealer wins on initial 14-tile deal (no draws).
Limit	Earthly Hand 地胡	Non-dealer wins on East's very first discard, OR wins by drawing the very first tile.
Limit	Humanly Hand 人胡	Non-dealer wins by discard in first round before anyone's first draw, no exposed melds.

Extra Fan Conditions (+1 each)

Condition	Details
Self Draw 自摸	Win by drawing the tile yourself from the wall
Dragon Triplet/Kang	+1 per dragon (Red/Green/White). Each scores separately.
Seat Wind Triplet/Kang	+1 for triplet of your own seat wind
Prevailing Wind Triplet/Kang	+1 for triplet of the round's prevailing wind. If seat wind = prevailing wind, the ONE triplet scores +2.
Own Flower 正花	+1 per flower/season tile matching your seat (East=Flower1/Season1, etc.)
Other Flower 偏花	+0 in standard rules (non-own flowers score nothing toward hand)
Complete Flower Set	All 4 Flowers (any colour) = +2pts total. All 4 Seasons = +2pts total.
All 4 Animals	+5pts total (1 per animal + 1 extra). Each animal = +1pt individually.
Robbing the Kang 抢杠	Win by taking a tile another player adds to an exposed triplet (Kang)
Last Tile in Wall 海底捞月	Win with the last drawable tile (16th from end of wall)
Win on Kang Replacement 杠上	Win with the replacement tile drawn after declaring a Kang
Win on Flower Replacement 花上	Win with the replacement tile drawn after drawing a bonus tile
Fully Concealed Hand 门清	No exposed Chow/Pong melds, must Self-Draw to win. +1pt.
All Simples	No terminal tiles (1 or 9) and no honor tiles in hand. +1pt.

Flower, Season & Animal Bonus Rules

Own Flower/Season (正花): East holds Flower 1 or Season 1, South holds Flower 2 or Season 2, etc. = +1pt each.
Other Flower/Season (偏花): Non-matching seat flower tiles score 0 points toward the hand in standard rules.
Complete Flower Set (一台花): All 4 Flowers of same colour = +2pts (1 for own + 1 for complete). Instant payout to all players when collected.
All Flowers & Seasons (八仙过海): Collect all 8 bonus tiles by Self-Draw = automatic win at limit. Do NOT reveal hidden hand.
Animal Instant Payments (咬到 yǎo-dào): Cat+Mouse pair OR Rooster+Worm pair = immediate one-time payment from all players. All 4 animals = double payment (cumulative). This is separate from the end-game score.
Animal points: Each animal = +1pt. All 4 animals = +5pts total (4+1 bonus).

Dealer & Wind Rotation

East (Player 1) is the dealer. East is the prevailing wind in Round 1.
Dealer wins → winds stay. Same dealer plays again.
Any other player wins → all seat winds rotate anti-clockwise one step.
After all 4 players have held East, prevailing wind changes: East → South → West → North.
Flower 1 & Season 1 = East seat. Flower 2 & Season 2 = South. Flower 3 & Season 3 = West. Flower 4 & Season 4 = North.

High-Risk Discard Scenarios (Pao 包 — Shooter Pays All)

In these situations the discarder pays the FULL payout (including what the other two losers would normally pay):

Dragon Pao 包三元: Player A has 2 dragon Pong/Kangs exposed. Player B discards the 3rd dragon type → Player B pays all if A wins.
Wind Pao 包四喜: Player A has 3 wind Pong/Kangs exposed. Player B discards the 4th wind type → Player B pays all if A wins.
Limit Pao 包满贯: Player A already has (Limit−1) points exposed. Player B discards a tile that brings A to the limit → Player B pays all if A wins.
Full Flush Pao 包清一色: Player A has 3–4 sets of same suit exposed. Player B discards a same-suit tile → Player B pays all if A wins.
Kang Pao 包杠: With ≤7 tiles in wall, Player B discards a fresh tile (never discarded before), Player A Kangs it → Player B pays all Kang instant payment.
Fresh Tile Pao 包生: With ≤5 tiles in wall, Player B discards a fresh tile and Player A wins with it → Player B pays all winnings.

Penalties

Wrong Win Claim 诈胡: Player claims a win incorrectly. Must pay 5pts (or limit) to all 3 players — discarder gets double.
Short Hand 小相公: Fewer than 13 tiles in hand. Player forfeits right to win for current round (but can still Kang).
Long Hand 大相公: More than 13 tiles in hand (or drew wrong tile). Player forfeits right to win AND right to Kang for current round.
Sacred Discard 回头牌: If you discard a tile, you cannot claim the same tile from others' discards for win/Pong in the same go-around.
Missed Discard 过水牌: If you miss claiming a tile, you cannot claim the same tile from other players' discards for win/Pong in the same go-around.

🎉

Game Complete!

Full cycle completed — all players have been dealer.

🏆 Final Payout

📋 Full Round History

Singapore Mahjong Calculator

Round 1 — East Wind 東

🏆 Winning Player: