Mahjong fu
Fu measures how awkward a hand was to build. You start at 20, add for your sets, your pair, your wait and the way you won, then round up to the next 10.
Every source of fu
| What earns it | Fu |
|---|---|
| Base (every hand) | 20 fu |
| Closed hand winning on a discard | 10 fu |
| Self-draw (except with pinfu) | 2 fu |
| Open triplet of 2-8 | 2 fu |
| Open triplet of terminals or honours | 4 fu |
| Concealed triplet of 2-8 | 4 fu |
| Concealed triplet of terminals or honours | 8 fu |
| Open kan of 2-8 | 8 fu |
| Open kan of terminals or honours | 16 fu |
| Closed kan of 2-8 | 16 fu |
| Closed kan of terminals or honours | 32 fu |
| Pair of dragons, the round wind or your seat wind | 2 fu |
| Closed, edge or single wait | 2 fu |
Two exceptions
- Pinfu won on a self-draw is fixed at 20 fu, with nothing added.
- Seven pairs is fixed at 25 fu, with no closed-ron bonus.
The order to count
- Start at 20.
- Add 10 for a closed hand won on a discard, or 2 for a self-draw.
- Add for each triplet and kan from the table above. Runs earn nothing.
- Add 2 if your pair is a dragon, the round wind or your seat wind (4 if it is both winds).
- Add 2 for a closed, edge or single wait. Two-sided and dual-pair waits earn nothing.
- Round the total up to the next 10. If you called and are still at 20, make it 30.
Worked examples
Pinfu won on a discard
30 fu, 1 han／Pinfu／1,500 points（Ron）
Seven pairs on a self-draw
25 fu, 3 han／Seven pairs・Menzen tsumo／4,800 points（Tsumo）
Three concealed triplets on a self-draw
40 fu, 3 han／Three concealed triplets・Menzen tsumo／5,200 points（Tsumo）
Fu calculator
Tap tiles to build a 14-tile hand and you get the fu breakdown plus the yaku, han and score.
Pick tiles
Your hand
Winning tile (the last one you tapped)
Result
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Now put it to work
Last updated 2026-09-14 · Run by Qdan, Inc.