Riichi Mahjong Score Calculator
Use this tool to calculate payment amounts for a winning hand in Japanese Riichi Mahjong (ron or tsumo), including dealer/non-dealer status, honba, and riichi sticks.
How this mahjong calculator helps
Scoring in mahjong can feel intimidating, especially when you’re balancing han, fu, dealer multipliers, and table bonuses such as honba and riichi sticks. This calculator is designed to remove that friction so you can focus on learning game flow, tile efficiency, and defense. Enter your hand values, choose ron or tsumo, and get an instant payment breakdown.
The tool follows standard Riichi Mahjong arithmetic, including rounding to the nearest 100 points and applying limit hand thresholds (mangan, haneman, baiman, sanbaiman, and yakuman).
Mahjong scoring basics in plain language
1) Han and fu create base points
Most normal hands start with this formula:
Base points = fu × 2^(han + 2)
After base points are found, the game applies role multipliers and rounds up to the nearest 100 points for payments.
2) Limit hands cap scoring
- Mangan: 5 han, or any hand where raw base reaches 2000
- Haneman: 6–7 han
- Baiman: 8–10 han
- Sanbaiman: 11–12 han
- Yakuman: 13+ han (counted yakuman)
When a hand is in one of these tiers, fu no longer changes the payout amount.
3) Win type matters
- Ron: one player (the discarder) pays the winner.
- Tsumo: all other players pay the winner, with dealer usually paying more if the winner is non-dealer.
What this calculator includes
- Dealer and non-dealer winning payouts
- Ron and tsumo payment logic
- Honba bonus handling:
- Ron: +300 points per honba from discarder
- Tsumo: +100 points per honba from each paying player
- Riichi stick collection (+1000 per stick to winner)
- Automatic round-up to nearest 100 points
Quick examples
Example A: Non-dealer ron, 3 han 40 fu
Base points are calculated from han and fu, multiplied by 4 for non-dealer ron, then rounded up. If there are no honba or riichi sticks, the result is the classic single-payment ron amount from discarder to winner.
Example B: Dealer tsumo, 2 han 30 fu, 1 honba
Each non-dealer pays the same amount to the dealer winner. Honba adds +100 to each payer in tsumo situations, so all three payments increase together.
Example C: 8 han hand (baiman)
Once the hand reaches baiman tier, fu is effectively irrelevant for payout. The calculator still accepts fu input, but the limit class determines final base points.
Common mistakes this tool prevents
- Forgetting that payments are rounded to the nearest 100
- Applying ron multipliers to tsumo (or vice versa)
- Missing honba additions in long repeat rounds
- Ignoring riichi sticks on the table when calculating net gain
- Trying to score high-han limit hands with raw fu arithmetic
Important note about rulesets
This calculator is built for standard Japanese Riichi scoring conventions. House rules can vary (for example, kiriage mangan or treatment of multiple yakuman). If your table uses custom rules, use this as a baseline and adjust accordingly.
Practical study tip
During review, calculate one hand manually first, then verify with the tool. Doing this for a week dramatically improves scoring speed and confidence. You will soon recognize common scores by pattern rather than by full arithmetic every time.