BaZi Calculator · Four Pillars of Destiny
Free online BaZi chart — stems & branches, Ten Gods, hidden stems, NaYin, symbolic stars, luck pillars, element strength and structure
Year Ancestry | Month Month Command | Day Day Master · Self | Hour Later Life | |
|---|---|---|---|---|
| Stem God | 正官Dir. Officer | 七杀Seven Kill | 男主 | 伤官Hurt Officer |
| Stem | 丙 | 丁 | 辛 | 壬 |
| Strength | 囚 | 囚 | 旺 | 相 |
| Branch | 午 | 酉 | 卯 | 辰 |
| Hidden | 丁·火70% 己·土30% | 辛·金100% | 乙·木100% | 戊·土60% 乙·木30% 癸·水10% |
| Hidden God | 七杀透 偏印 | 比肩透 | 偏财 | 正印 偏财 食神 |
| NaYin | 天河水 | 山下火 | 松柏木 | 长流水 |
| Void | 寅卯 | 辰巳 | 午未 | 午未 |
| Stage | 病 | 临官 | 绝 | 墓 |
| Seat | 帝旺 | 长生 | 绝 | 墓 |
| Stars | 天乙贵人 将星 绞煞 | 禄神 红艳 灾煞 | 流霞 将星 桃花 阴阳差错 | 六厄 寡宿 |
| Stem | 丙辛五合化水 (spaced apart · weakened) (Combination)·丙壬相冲 (far apart · nominal only) (Clash)·丁壬五合化木 (spaced apart · weakened) (Combination) | |||
| Branch | 午卯相破 (Destruction)·酉卯相冲 (Clash)·酉辰相合 (Combination)·卯辰相害 (Harm) | |||
| Strength by month branch:金旺水相土休火囚木死 | ||||
Percentages are this tool's hidden-stem weighting, not the live commanding-qi strength.
Advanced analysis (structure, favourable element, classical texts) is currently available in Chinese only.
Luck Pillars
Ten years to a pillar · the axis of a life
Luck · Annual Pillars
One pillar a year · the season in command
Energy distribution
Weighted Five Elements · Ten Gods
How are these numbers computed? (show the formula)
A two-layer weighted sum, then normalisation. Each heavenly stem contributes the full positional weight of its pillar; each branch splits its positional weight across its hidden stems (primary / middle / residual), and every part is mapped to an element and a Ten God before being summed.
score(element e) = Σ stems [ W_stem(pos) · 1(element = e) ] + Σ branches Σ hidden_k [ W_branch(pos) · R(count)[k] · 1(element = e) ] percent(e) = score(e) / Σ score
- Positional weights W: year stem 6, month stem 12, day stem 12, hour stem 12; year branch 10, month branch 40, day branch 20, hour branch 10. The month branch dominates — it carries the seasonal command.
- Hidden-stem split R: branches with three hidden stems use 0.6 / 0.3 / 0.1 (primary / middle / residual), two hidden stems use 0.7 / 0.3, a single hidden stem takes the full 1.0. Example — a 寅 month branch (hiding 甲丙戊) gives Wood +40×0.6=24, Fire +40×0.3=12, Earth +40×0.1=4.
- Normalisation: each score is divided by the total to give a percentage. Cards show scores to one decimal and percentages rounded to integers, so the five percentages may not sum to exactly 100%.
- Scope: the element bar includes the Day Master stem itself (weight 12) to show overall momentum; the Ten Gods bar excludes it (the Day Master has no Ten God relation to itself), so the two totals differ.
This chart applies only the two layers above — positional weight and hidden-stem split. It does not apply seasonal-phase coefficients (prosperous/strong/resting/trapped/dead), depth-of-command bonuses, or adjustments for punishments, clashes and combinations. Seasonal phases are shown in a separate row under the chart; clash/combination corrections apply only to the strength and Useful God verdicts, which use a different scoring basis and should not be cross-checked against these numbers.
格局详解
主格 · 判定链路 · 兼格
月支酉为日主辛之禄, 月令建禄
依序尝试, 首个命中即为主格：● 命中 · ○ 不成立 · ─ 未检 (前序已命中)。悬停可见各步判定条件。
此局无兼格 — 日柱格与时格、拱格、倒冲诸奇格均不成。
用神喜忌
两派并参 · 喜忌分明
格局派依《子平真诠》之成败救应 · 顺逆用神法立相神；盲派依段氏做功论命，以功神论喜忌、不论身强身弱。两派并参，综合喜用为两派之并集。
命局病药
病药论 ·《神峰通考》
此局之病: 用神土带伤; 对症之药: 水 (制忌)、土 (通关)、金 (制忌)。病不重而药亦缓, 平实之造, 谋事宜稳扎稳打。早岁即得药运, 起步顺遂, 贵在乘势蓄根基。
- ●●●用神土带伤
用神土之根 辰被卯所穿 — 根摇则用神受损, 吉处藏凶, 最喜岁运解救。
克制忌神火, 直去其病。
原局仅存微根, 药力薄, 须岁运补足。
泄忌神火之气而转生喜用, 化敌为友。
原局仅存微根, 药力薄, 须岁运补足。
克制忌神木, 直去其病。
原局仅存微根, 药力薄, 须岁运补足。
- 戊戌9-18岁药至戊戌药气入运而不带病, 病处得医之期
- 己亥19-28岁药至己亥药气入运而不带病, 病处得医之期
- 庚子29-38岁药至庚子药气入运而不带病, 病处得医之期
- 辛丑39-48岁药至辛丑药气入运而不带病, 病处得医之期
- 壬寅49-58岁药病相杂壬虽为药, 反滋寅中病气, 明得暗失
- 癸卯59-68岁药病相杂癸虽为药, 反滋卯中病气, 明得暗失
- 甲辰69-78岁药病相杂甲盖头压辰中药气, 药力打折, 吉而有阻
- 乙巳79-88岁病发忌神乙巳会聚入运, 病处受激, 守成为要
- 丙午89-98岁病发忌神丙午会聚入运, 病处受激, 守成为要
What is BaZi (the Four Pillars)?
BaZi, the Four Pillars of Destiny, is the core method of classical Chinese astrology. A person's birth year, month, day and hour each form a "pillar" of one Heavenly Stem and one Earthly Branch — eight characters in total. The Day Stem is the Day Master, representing the person; the other seven characters interact with it through the five-element cycle to form a complete natal chart.
A professional Four Pillars chart shows not only the eight characters but also the Ten Gods, hidden stems, NaYin elements, voids, the twelve life stages, symbolic stars, luck pillars, element strength, the Life/Body Palaces and Fetal Origin, plus structure and climatic favourable elements. This tool computes all of them at once, supports solar, lunar and eight-character input with true-solar-time correction, and is free with no sign-up.
How to chart BaZi: four steps to your natal chart
Charting is deterministic calendar computation — these four steps let you read any BaZi chart.
- 1
① Fix the birth time
BaZi rests on an exact hour. For cross-region or boundary Zi-hour (23:00/01:00) births, correct longitude with true solar time first.
- 2
② Lay out the four pillars
Set the month pillar by the 24 solar terms and the hour stem from the day stem to get all eight characters.
- 3
③ Annotate the elements
List the Ten Gods, hidden stems, NaYin, voids, life stages and stars for each pillar, and tally element strength.
- 4
④ Luck pillars & favourable element
Arrange luck pillars by yin/yang direction, compute the start age, then judge the favourable element from structure and climate.
Every step above is automated here — enter your birth details and tap "Chart" to get the full result at once: pillars, Ten Gods, hidden stems, NaYin, stars, luck pillars, element strength and structure.
What a BaZi chart shows: the ten core elements
Understand these ten elements and the whole Four Pillars chart opens up.
- Stems, Branches & the Four Pillars
- Ten Heavenly Stems and twelve Earthly Branches pair into the sixty Jia-Zi. Year, month, day and hour each take one pair — the four pillars, the skeleton of the chart.
- Day Master & the Ten Gods
- The Day Stem is the Day Master. Measured against it, the other characters yield the Ten Gods (Friend, Rob Wealth, Eating God, Hurting Officer, Wealth, Officer, Killings, Resource…), which drive structure and analysis.
- Hidden Stems
- Each branch hides 1–3 stems (primary, middle, residual). The commanding stem of the month branch is decisive for structure and the favourable element.
- NaYin Elements
- Each pair of the sixty Jia-Zi carries a NaYin element (e.g. Gold in the Sea), thirty in all, used in compatibility, date selection and analysis.
- Symbolic Stars (ShenSha)
- Auspicious stars (Nobleman, Academic, Travelling Horse, Peach Blossom…) and inauspicious ones add nuance and warnings alongside structure — treated as secondary in the classics.
- Luck Pillars & Annual Luck
- Luck pillars run from the month pillar, ten years each; the annual pillar interacts with the chart to shape each period. The tool links annual, monthly and daily luck.
- Element Strength & Favourable Element
- Judge the Day Master's strength from the season, roots and stems, then choose the favourable and unfavourable elements by strength, climate and mediation.
- Chart Structure
- The month branch defines normal and special structures (Officer, Killings, Wealth, Eating, Hurting, Resource, Lu, Yang Blade, Follow, Transformation…), whose success sets the chart's level.
- Void & Life Stages
- Voids (two stem-less branches from the day pillar's cycle) weaken forces that land on them; the twelve life stages (Birth, Bath … Peak … Tomb, Death) gauge a stem's state within a branch.
- Life / Body Palace & Fetal Origin
- The Life Palace (month + hour), Body Palace (day + hour) and Fetal Origin form the "seven pillars" with the four pillars — auxiliary coordinates for advanced reading.
- True Solar Time
- China uses one standard time (120°E) yet local solar time can differ by over an hour. Boundary Zi-hour births especially need true-solar-time correction.
- Classical Sources
- Structure follows Zi Ping Zhen Quan and climatic use follows Qiong Tong Bao Jian, with reference to Di Tian Sui, San Ming Tong Hui and Yuan Hai Zi Ping.
Four Pillars (BaZi) Chart — FAQ
延伸阅读
名人命例与流年通览，都可一键回到排盘工具对照。
Related charting tools
Beyond BaZi charting, these tools share the same Four Pillars roots.
Related Reading
Explore the I Ching and traditional Chinese culture
A Systematic Survey of Duan-School Blind-Sect Fate Calculation
A systematic survey of Duan-school Blind-Sect (Mangpai) fate calculation, examined through its lineage, guest-and-host framework, substance-and-function framework, structural work (gong), emptiness and solidity, the Ten Gods, image-reading methods, tomb-and-storage palaces, and timing systems — with a clearly bounded comparison to the Ziping pattern method.
Celestial Stems Unfolding and the Hidden Shield Transformed: A Unified Mathematical-Metaphysical Inquiry into the Information Volume of Bazi and Qimen Dunjia
Starting from the mathematical structure of Taiji, the Two Modes, Four Images, and Eight Trigrams in the Book of Changes, this article systematically explores the information-carrying capacity of Bazi and Qimen Dunjia as divinatory systems. Through analysis of Yin-Yang, the Five Phases, the Hetu and Luoshu, and other classical mathematical foundations, it seeks to provide a unified perspective for measuring and comparing the information volume of these two arts.
Explaining the Yijing to a Distant Friend: An Introduction to the Xici Zhuan
An introduction to the Xici Zhuan (Appended Statements) of the Zhouyi, written for a faraway reader. Beginning with the fundamental concepts of hexagrams, lines, yin-yang, and the high and the low, it clarifies the composition and reading of the Xici, dispels the most common misunderstandings of beginners and overseas readers, and paves the way for a close study of the twelve chapters of the Upper Xici.
An Inquiry into the Chapter 'The Sage Perceives the Profundity of All Under Heaven': The Primordial Code of Xiang and Yao
This article investigates the central thesis of the Xi Ci Shang Zhuan (Great Commentary, Upper Section) of the Zhouyi — how the sage transforms the hidden textures of reality (ze) into externalized images (xiang) through the cognitive leap of 'gazing upward and examining below.' It reveals the inner connection between yao (lines) and ancient ceremonial institutions, reconstructing the foundations of Yijing theory.
The Pivot of Terrestrial Order: A Study of the Six Conjunctions and Qi Transformations of the Twelve Earthly Branches in High Antiquity
This essay strips away the veneer of divinatory numerology to return to pre-Qin astronomy and cosmology, offering a rigorous investigation of the true nature of the Six Conjunctions of the Twelve Earthly Branches — Zi-Chou, Yin-Hai, Mao-Xu, Chen-You, and the rest. It focuses on the astronomical 'conjugation' essence of the Six Conjunctions, and the philosophical implications — sealing and storing, sprouting and rising, refining and transforming, revolution and change — concealed behind their 'qi transformations.'
The Realm of Clarity: The Ontological Significance and Life Philosophy of the Qingming Solar Term
This article offers a philological and philosophical examination of the Qingming solar term, exploring the cosmic significance and humanistic ideals embodied in the concepts of "clarity" (qing) and "luminosity" (ming). Through a comprehensive analysis of its dual nature as both a seasonal juncture and a cultural festival, the study elucidates the traditional worldview of the unity of man and nature, revealing the profound reflections within Chinese civilization on life, death, and ethical order.