Calculator
Tap tiles to build any hand. The score comes from the same engine that scores the game, recomputed on every change, with each pattern linking to its page. The address bar always holds the whole hand, so a scored hand is a link you can share.
Pick your tiles
Declared sets
Open or concealed, a declared kong scores the same here: it breaks Concealed Hand either way, unlike the Japanese game.
Winds
How it was won
Flowers and seasons
Your hand · 0 / 14
Values are Hong Kong faan, checked against the Hong Kong Mahjong Association rulebook and the Chinese reference tables, with a 13 faan cap and a 3 faan Classic minimum. Named big hands are whole-hand totals, so the sets inside them do not count twice.
The scoring is not a reimplementation. This page runs the same code that scores Mahjong Winds, so a hand scores here exactly as it scores at the table.
Every pattern, explained in tiles · What we checked, and where sources differ