Is the Weight of Your BaZi Accurate? A Complete Analysis of Bone Weight Method vs. BaZi

Many people first encounter BaZi and hear the question: "How heavy is your BaZi?" After calculating, they find they are "3 Liang 2 Qian" or "4 Liang 8 Qian," and then wonder—is this number accurate? Is heavier always better?

Let's get straight to the point: The Bone Weight Method is not a 'simplified version' of BaZi; it is a completely different quick-reference system. It looks similar to BaZi (both use year, month, day, and hour), but the underlying logic is entirely different.

If you just want an answer like "what my life is roughly like," the Bone Weight Method gives you a rhymed verse—simple and convenient. But for precise fortune analysis, it is several orders of magnitude less accurate than your actual BaZi chart.

Where Did the Bone Weight Method Come From?

It is traditionally attributed to Yuan Tiangang of the Tang Dynasty. Yuan was a famous physiognomist and one of the authors of the Tui Bei Tu (推算圖), enjoying great fame.

However, the definitive version of the Bone Weight Song (稱骨歌) we see today was compiled after the Song Dynasty. It consists of 51 rhymed verses, ranging from 2 Liang 1 Qian to 7 Liang 1 Qian, each corresponding to a life summary based on bone weight.

It became widely popular among the people during the Ming and Qing dynasties. Why so popular? Because the barrier to entry is low—you only need to look up four numbers, add them up, and get a clear answer. Compared to BaZi, which requires learning the Ten Gods, Five Elements, and Luck Cycles to interpret, this is a "commoner's version" of fortune telling.

But "commoner's version" does not mean "simplified BaZi."

How to Calculate?

The formula for Bone Weight is simple:

Year weight + Month weight + Day weight + Hour weight = Your bone weight

Each Stem-Branch (Gan Zhi) corresponds to a fixed weight in Liang and Qian. Just look up the table and add them up.

Take a familiar example for Hong Kong and Taiwan readers—Jay Chou (born January 18, 1979; exact birth time not publicly available, here we assume Zi hour):

Total ≈ 5 Liang 8 Qian

The corresponding verse roughly means: "Your life's clothing and salary are long-lasting; you make your own decisions in everything."

After reading, you might think, "Yes, that fits Jay Chou." But here's the problem—anyone born around January 18, 1979, at Zi hour (there could be hundreds in Taiwan alone that day) would calculate the same bone weight of 5 Liang 8 Qian and get the same verse.

Does everyone "make their own decisions in everything"?

Bone Weight Method vs. BaZi: What's the Relationship?

Both use the BaZi as input, but the methods and outputs are completely different.

Simply put: Bone Weight is a "static lookup table", while BaZi is "dynamic calculation." One is a dictionary; the other is a computer.

Is It a "Simplified Version of BaZi"?

No. This is the most common misconception.

Although the Bone Weight Method uses the "input" of BaZi (year, month, day, hour), it completely detaches from BaZi theory:

• BaZi looks at the 'relationships between characters'—how Heavenly Stems and Earthly Branches match, which Five Element generates or overcomes which, who is the Useful God, where the Unfavorable God lies.
• The Bone Weight Method ignores all that; it only uses the BaZi as "four entry points for lookup" and then does addition.

To use an analogy:

BaZi reading your fate is like a full body check-up—blood test, ECG, imaging, with a doctor's comprehensive diagnosis. The Bone Weight Method calculating your fate is like using BMI to judge health—just divide height by weight and get a number.

Both use height and weight as input, but saying "BMI is a simplified version of a check-up" is a stretch. They are fundamentally different methodologies.

The Bone Weight Method is more like a "folk fortune quick-reference" system, independent from BaZi studies, even though they share the same input.

Even the Ancients Can't Pass This Test

Let's try an ancient figure—Li Bai (legend has it born in 701 AD in Shu; the exact month, day, and hour are highly disputed across historical versions).

If we use a popular folk version (May 22, 701 AD, Wu hour) to calculate bone weight, we get about 5 Liang 4 Qian, corresponding to a verse roughly meaning: "This fate's fortune is indeed like this; in the monastic path, clothing and salary are abundant."

Is this accurate? Li Bai was never a monk or Taoist—he was a poet, a drinker, a wanderer, whose greatest wish was to enter Chang'an as an official. The verse clearly doesn't fit.

But if you change the hour (from Wu hour to Zi, Yin, or Xu hour), the bone weight immediately jumps to 4 Liang or 6 Liang, and the corresponding verse changes drastically. No one knows Li Bai's actual birth time, so the 'Li Bai bone weight' you calculate is actually a 'guessed bone weight.'

This exposes another weakness of the Bone Weight Method: it is extremely sensitive to input but has zero tolerance for input error. A one-hour error in the birth time changes the entire verse—and if you don't even know the ancient person's real time, how can you trust it?

Why Is This System Still Popular?

Three reasons:

1. Ancient text endorsement: Yuan Tiangang's fame is great, the Bone Weight Song has been passed down for millennia, and the public trusts it.
2. Clear answer: You want to know "what my life is like," and it gives you a direct sentence without learning any terminology.
3. No thinking required: Once calculated, it's done; no further analysis needed.

But the cost is—accuracy is actually very limited.

Think about it: With 8 billion people in the world, the Bone Weight Method classifies them into only 51 groups. On average, 150 million people per group share the "same fate." This clearly cannot reflect real individual differences.

It's more like a "fate zodiac" (you're a Cancer, so you're gentle) rather than a "fortune tool." It's fine as a fun reference, but too thin as a life guide.

If You Want Serious Fortune Analysis, Return to BaZi Itself

The real process of BaZi fortune analysis is:

1. Chart casting: Year, month, day, hour → eight characters + Hidden Stems + Luck Cycles
2. Pattern analysis: Day Master strength, Useful God and Unfavorable God preferences, overall structure
3. Luck Cycle and Annual Cycle analysis: Life stages, changing every 10 years, with different focuses each year
4. Specific issues: Love, career, wealth, health—each analyzed separately

This process can tell you "what you should do and avoid in this stage"—something a single verse cannot cover.

More importantly: Your BaZi chart is unique, not a 1-in-51 selection. Very few people are born at the same year, month, day, and hour, and with the influence of birth location, each chart has its own story.

Appendix: 6 Selected Bone Weight Verses

Below are a few representative verses to give you a feel for this quick-reference system's style (folk versions vary slightly):

2 Liang 1 Qian

Short life not due to karma but great emptiness, disasters and difficulties throughout life.

3 Liang 2 Qian

Fate destined for many calamities, close blood relatives often separated.

4 Liang 3 Qian

This person is most intelligent by nature, acts with dignity and approaches nobles.

5 Liang 2 Qian

Achieve fame and become known worldwide, pass the imperial exam and honor ancestors.

6 Liang 1 Qian

This fate's person has high talent, alone builds a family with power and wealth.

7 Liang 1 Qian (heaviest)

This fate is born with no light fortune, wealth and glory truly praiseworthy.

As you can see, the verses use vague language and general conclusions. Anyone who reads them will think, 'That kind of sounds like me'—this is a classic Barnum Effect: vague, positive descriptions apply to anyone.

One-Sentence Summary

The Bone Weight Method is a folk fortune quick-reference system, completely different from BaZi fortune analysis.

It's fine for fun conversation, but too thin as a life guide. For serious fortune analysis, return to BaZi itself.

👉 Free chart casting to see your real BaZi: here