Riichi score calculator

How to use it

1. Pick the han and the fu. At 5 han and up the fu stop mattering, so the fu box locks.
2. Not sure of the fu? Open Help me count fu, describe the wait, the pair and the four melds, then press Use to copy the total across.
3. Set who won (dealer or not) and how (ron or tsumo).
4. Add honba and any riichi sticks on the table. The result shows what each player pays and what you collect.
5. Copy the link to send the exact hand to a friend. The table at the bottom rings your cell.

Rules this tool assumes

• Basic points are fu x 2^(2 + han), capped at mangan. Payments round up to the next 100.
• Mangan from 5 han, or 4 han 40 fu and 3 han 70 fu. Haneman 6-7, baiman 8-10, sanbaiman 11-12, kazoe yakuman 13+.
• Kiriage mangan is off by default. Switch it on and 4 han 30 fu and 3 han 60 fu pay a mangan.
• Double and triple yakuman stack.
• Each honba adds 300 to a ron, or 100 from each payer on a tsumo. Each riichi stick is worth 1,000 to the winner.
• Pinfu tsumo is 20 fu, seven pairs is 25 fu, and an open hand with no fu is rounded to 30.