Games / Board and card tools
Riichi Mahjong Score Calculator
Build a winning riichi hand and see its best scoring arrangement, yaku, fu and payments.
Riichi Mahjong Score Calculator: Pick the tiles of your winning hand, any called sets, the winning tile and the situation (riichi, tsumo or ron, seat and round wind, dora), and see every yaku, the fu breakdown, han and the points each player pays. Scoring follows the World Riichi Championship 2022 rules, with an option for red fives. Runs 100% locally in your browser with zero server file uploads.
- Category
- Health & sport tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
WRC 2022 scoring: open tanyao, stacking yakuman, no double or counted yakuman, and two fu for a double-wind pair. Red fives and disabling kiriage are optional variations. Enter a legal win. Furiten and responsibility payments depend on the play history.
m = characters, p = circles, s = bamboo; z = east, south, west, north, white, green, red. A 0 is a red five. Include the winning tile in the concealed hand. Kans add a fifteenth tile or more.
Concealed tiles · 14
Winning tile: 6m
Rules and yaku
The scoring profile follows WRC 2022, sections 11.3–11.5. Red fives are an optional variation. Rules: https://www.worldriichi.org/s/WRC_Rules_2022_20220708_site.pdf
Fu and payment calculation
Below the limit, base points are fu × 2^(han + 2). Ron multiplies the base by four, or six for the dealer; tsumo uses one or two times the base per payer. Round each payment up to 100. Kiriage rounds 4 han 30 fu and 3 han 60 fu to mangan. Tables: https://www.worldriichi.org/s/WRC_Rules_2022_20220708_site.pdf
How to use it
- Add the concealed tiles, declared melds and winning tile.
- Set the winds, winning method, declarations and bonus indicators.
- Calculate the score and inspect each yaku and fu component.
Privacy & limitations
Everything is calculated in your browser. Cards, positions, images and scores are not uploaded.
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Frequently asked questions
Which rules are used?
WRC 2022: open tanyao, no counted or double yakuman, two fu for a double-wind pair, and stacking distinct yakuman. Kiriage is enabled by default. Red fives and disabling kiriage are optional variations.
How do I enter a kan?
Add four tiles to a declared open or closed kan. The concealed hand plus three tiles per meld must total fourteen; every kan therefore adds one physical tile.
Does it establish whether I may declare a win?
No. Enter a legal win. Furiten, declaration timing and responsibility payments require the play history and are not adjudicated here. Renhou is scored as a standalone mangan unless the normal hand is worth more.
Free tool · runs in your browser · no account required