Why Score Calculation Feels Hard (But Isn’t)

Many Riichi Mahjong players avoid learning score calculation because it looks complicated. Tables, formulas, rounding rules — it can seem like a lot. But here is the truth: score calculation is almost entirely just memorization and addition. Once you understand the structure, most hands can be scored in seconds.

The part that trips people up is a unit called Fu. Fu does add some complexity, but — and this is the key insight — the majority of hands can be scored without ever calculating Fu. This guide will show you the shortcut method first, and the official Fu-based method second.

The Three Steps of Score Calculation

Every score in Riichi Mahjong is determined by the same three-step process:

• Step 1 — Count Han. Han is the primary unit of hand strength. Each yaku contributes a set number of han, and dora tiles add one han each.
• Step 2 — Count Fu. Fu is a secondary unit based on your hand’s structure. Many hands have a fixed or predictable Fu value, which is why the shortcut method works for most situations.
• Step 3 — Look up the score. Use the score table for your Han and Fu combination to find the final point value.

The Shortcut Method: Scoring Without Fu

For most hands, once you know the number of Han, you only need to check three additional things to find the score:

• Win type: Ron (claiming a discard) or Tsumo (drawing the winning tile yourself)?
• Hand state: Closed (no tiles called) or Open (tiles called)?
• Pinfu: If the hand is closed, does it include Pinfu?

These three checks cover the most common Fu outcomes. Open hands and closed hands with Pinfu tend to land on 30 Fu for Ron and 20 Fu for Tsumo — the two most frequent Fu values. Closed hands without Pinfu typically land on 40 Fu for Ron and 30 Fu for Tsumo. The tables below encode these results directly, so you never need to calculate Fu explicitly for these cases.

Child Score Tables (1–4 Han)

The following tables cover the four most common score cases for a non-dealer (child) player. Scores double roughly with each additional Han, though the official rounding rules produce “approximately double” results in some cases.

Ron — Closed with Pinfu (also applies to all Open Ron)

Ron — Closed without Pinfu

Note: if doubling 4 Han would exceed 8,000 points, the score is capped at 8,000 (Mangan). Under the Kiriage Mangan rule, 7,700 is also treated as 8,000.

Tsumo — Closed with Pinfu

In a child’s Tsumo win, you collect points from all three other players. The two non-dealer players each pay the smaller amount; the dealer pays double (shown as child/dealer in the table).

Tsumo — Closed without Pinfu (also applies to all Open Tsumo)

Under the Kiriage Mangan rule, a 4 Han Tsumo total of 23,900 (2,000 × 2 + 3,900) is rounded up to 24,000 (2,000 all from children, 4,000 from dealer).

Parent Score Tables (1–4 Han)

The dealer’s (parent’s) scores are 1.5 times the child’s base scores. In a dealer Tsumo win, all three non-dealer players pay the same amount (“all”).

Ron — Closed with Pinfu (also applies to all Open Ron)

Ron — Closed without Pinfu

Tsumo — Closed with Pinfu

A useful memory trick: the amount each player pays the dealer on a Tsumo win equals the amount the dealer pays when another player wins by Tsumo.

Tsumo — Closed without Pinfu (also applies to all Open Tsumo)

Under Kiriage Mangan, dealer 4 Han 11,600 becomes 12,000, and 3,900 all becomes 4,000 all.

Chiitoitsu Score Table

Chiitoitsu (Seven Pairs) uses its own fixed score table. It is always calculated at 25 Fu regardless of the actual hand structure, which puts it in a separate category from the shortcut tables above.

5 Han and Above: Mangan Through Yakuman

At 5 Han or more, Fu no longer matters. The score is determined entirely by the Han count and follows fixed names and values.

How to Count Fu: The Official Method

When the shortcut method does not apply — specifically when your melds contain 6 or more points of Fu — you need to calculate Fu directly. Fu is the sum of five elements, rounded up to the nearest 10.

The Five Elements of Fu

Example Fu Calculation

Here is a worked example. Suppose you win by Tsumo with the following hand:

• A concealed quad of a terminal or honor tile: 32 Fu
• An open triplet of a dragon tile: 4 Fu
• A dragon pair: 2 Fu
• A single-tile wait (Tanki): 2 Fu
• Tsumo win: 2 Fu
• Basic Fu: 20 Fu

Total before rounding: 32 + 4 + 2 + 2 + 2 + 20 = 62 Fu. Rounded up to the nearest 10: 70 Fu.

Special Fu Rules

Two exceptions override the standard calculation. A concealed Pinfu Tsumo win is always treated as 20 Fu (the Tsumo bonus is excluded for Pinfu). An open Ron win — where the hand would otherwise calculate to 20 Fu — is instead treated as 30 Fu.

When Do You Actually Need to Count Fu?

The practical rule is simple: only count Fu when your meld points total 6 or more. Here is why this threshold matters.

In the shortcut method, a closed hand without Pinfu is assumed to be 40 Fu (30 Fu for Tsumo). But if your hand contains a closed triplet of a terminal or honor tile (8 Fu), combined with even one other meld worth a couple of points, the real Fu value will push the total above 40 or 30. In those cases, using the shortcut score will undercount what you are owed.

If your melds total 4 Fu or less — for example, a single open triplet of simples — the shortcut tables remain accurate. The 20-point rounding-up rule absorbs the difference.

For most hands, especially as a beginner, the shortcut method is all you need. The score tables that are worth memorizing first are 30 Fu and 40 Fu Ron (the most common Ron cases) and 20 Fu and 30 Fu Tsumo (the most common Tsumo cases). Master those, and you will be able to score the large majority of hands you encounter.

Final Thoughts

Riichi Mahjong score calculation is a learnable skill, not a mathematical obstacle. The structure is clear: count Han, check the three shortcut conditions (Ron or Tsumo, open or closed, Pinfu or not), and look up the result. Fu calculation adds precision for specific hand types, but the majority of everyday hands never require it.

Start by memorizing the child score tables for 30 Fu Ron and 20 Fu Tsumo. Add the parent tables, then Chiitoitsu, then the Mangan-and-above names. Once those are solid, the Fu calculation method will feel like a natural extension rather than a separate system to learn from scratch.

Score calculation is one of the skills that makes Mahjong feel real. Once you can verify your own scores at the table, the game opens up in a new way.