Fu Calculation Basics
Last updated: 2026-06-18Fu measures hand complexity for base points. Learn it with Scoring Basics and Counting Han.
What Is Fu
Base points = fu × 2^(han+2) (below mangan). Pinfu tsumo at 20 fu is a common exception.
Components
| Item | Fu |
|---|---|
| Base | 20 |
| Closed ron | +10 |
| Tsumo | +2 (rules vary) |
| Closed triplet (simple) | +8 |
| Closed triplet (terminal/honor) | +16 |
| Open triplet (simple) | +4 |
| Open triplet (terminal/honor) | +8 |
| Yakuhai pair | +2 |
| Tanki / kanchan / penchan wait | +2 |
Round total up to nearest 10 (e.g. 34 → 40 fu).
Examples
Seven pairs win
Closed seven pairs: often 2 han 25 fu on ron without extra wait fu.
From tenpai
Pinfu candidate: closed ron from 30 fu base; ryanmen +0, tanki +2. Han in Counting Han.
Then use Score Table Guide. Efficiency: Tile Efficiency.