R2T1A • MAHJONG TOOLS
R2T1A RIICHI SCORE LAB
Hand builder · Fu · Han · Point settlement
RIICHI MAHJONG SCORE CALCULATOR
v1.0.10Calculate Fu, Han and Points with quick scoring or a complete tile-based hand builder. Supports English, Chinese and Japanese.
Fast Calculation
Enter Fu and Han directly, or use the meld-based Fu builder below.
Fu meld builder
Regular Calculation
Add 13 tiles to your concealed area, plus any called melds. Then choose the winning tile. Each regular hand must contain four melds and one pair.
⚠ Please complete the steps in order (0 → 4) for accurate calculation.
0 · Open Area / Melds Optional
Add 3 or 4 tiles to each meld group. The calculator auto-detects Chi, Pon, Open Kan, or Closed Kan.
1 · Closed Area / Concealed Tiles 0 tiles
2 · Tile selector
Tap tiles to addClick to switch tile styles
3 · Winning tile & declarations
Prototype: supports standard hands and seven pairs. Several rare yaku and special circumstances require manual verification.