八字计算器
Bazi Calculator

八字计算器是一种将出生年、月、日、时转换为四柱八字命盘的工具。传统上，排盘需要查阅万年历，手工推算天干地支、藏干和十神——这一过程需要数年的专业训练。 现代八字计算器借助计算机算法，可以在几秒钟内完成精确排盘。一个优秀的八字计算器不仅能排出四柱，还能计算五行分布、日主旺衰、用神喜忌等关键信息。 BaziGua 的八字计算器基于 lunar-javascript 天文历法库，严格按照《渊海子平》的经典规则进行排盘。所有计算均经过真太阳时校正，确保时柱的精确性。

A Bazi calculator is a tool that converts your birth year, month, day, and hour into a Four Pillars of Destiny chart. Traditionally, chart calculation required consulting perpetual calendars and manually deriving Heavenly Stems, Earthly Branches, Hidden Stems, and Ten Gods — a process that takes years of professional training to master. Modern Bazi calculators use computer algorithms to complete precise chart calculations in seconds. A good Bazi calculator goes beyond just the four pillars — it also calculates Five Element distribution, Day Master strength, and Yong Shen (useful god) analysis. BaziGua's Bazi calculator is built on the lunar-javascript astronomical calendar library and strictly follows the classical rules from Yuan Hai Zi Ping. All calculations include True Solar Time correction to ensure Hour Pillar accuracy.

要准确排出八字命盘，计算器需要以下信息： **出生日期（年月日）**——这是确定年柱、月柱和日柱的基础。需要注意的是，八字中年份的分界不是公历1月1日，也不是农历大年初一，而是**立春**（通常在2月4日前后）。如果在立春之前出生，年柱仍属上一年。 **出生时间（时分）**——用于确定时柱。中国传统将一天分为十二个时辰，每个时辰对应两个小时。例如子时为23:00-01:00，丑时为01:00-03:00。精确的出生时间至关重要，因为差一个时辰就意味着完全不同的时柱。 **出生地点（经度）**——这是高级计算器的关键功能。由于中国跨越了多个地理时区但统一使用UTC+8，一个出生在新疆（东经80°）和上海（东经121°）的人，即使钟表时间相同，实际太阳位置相差巨大。真太阳时校正通过出生经度修正这一偏差。 **性别**——虽然不影响命盘本身，但性别决定了大运的顺行或逆行方向。男阳女阴顺行，男阴女阳逆行。

To accurately generate a Bazi chart, a calculator needs the following information: **Birth Date (Year, Month, Day)** — This is the foundation for determining the Year, Month, and Day Pillars. It's important to note that in Bazi, the year boundary is not January 1st, nor Lunar New Year, but **Li Chun** (Start of Spring, usually around February 4th). If you were born before Li Chun, your Year Pillar belongs to the previous year. **Birth Time (Hour, Minute)** — This determines the Hour Pillar. Traditional Chinese timekeeping divides the day into twelve two-hour periods called "shi chen." For example, Zi hour spans 23:00-01:00, and Chou hour spans 01:00-03:00. The exact birth time is crucial because even one hour difference can change the entire Hour Pillar. **Birth Location (Longitude)** — This is a key feature of advanced calculators. Because China spans multiple geographic time zones but uses a single UTC+8 standard, a person born in Xinjiang (longitude 80°E) and Shanghai (longitude 121°E) at the same clock time will have vastly different actual solar positions. True Solar Time correction uses the birth longitude to adjust for this discrepancy. **Gender** — While gender doesn't affect the chart itself, it determines the direction of Luck Pillars (Da Yun). Male Yang and Female Yin progress forward, while Male Yin and Female Yang progress in reverse.

真太阳时（TST）校正是区分普通计算器与专业计算器的核心功能。许多在线八字计算器只使用钟表时间排盘，这会导致时柱误差，进而影响整个命盘的准确性。 **为什么需要真太阳时？** 时柱的本质是太阳相对于地球的位置。古代没有统一时区，人们根据日晷（即太阳实际位置）来确定时辰。现代时区制度虽然便于社会运作，但同一时区内不同经度的太阳位置可能相差几十分钟甚至一个小时。 **真太阳时计算公式：** 真太阳时 = 钟表时间 + 经度修正 + 时差方程。经度修正基于出生地经度与标准子午线的差值（每度4分钟）；时差方程则修正由地球椭圆轨道和自转轴倾斜引起的日长变化。 **实际影响举例：** 如果一个人在成都（东经104°）下午17:00出生，经度修正约为 (104-120)×4 = -64分钟，加上当天的时差方程修正后，真太阳时可能只有15:58左右——从酉时（17:00-19:00）变成了申时（15:00-17:00），整个时柱完全不同。 BaziGua 内置了完整的真太阳时校正功能，用户只需输入出生城市或经度，系统会自动完成全部修正。

True Solar Time (TST) correction is the core feature that separates basic calculators from professional-grade ones. Many online Bazi calculators only use clock time, which can cause Hour Pillar errors and compromise the accuracy of the entire chart. **Why is True Solar Time needed?** The Hour Pillar fundamentally represents the sun's position relative to Earth. In ancient times, there were no standardized time zones — people determined the hour by sundial (the sun's actual position). While modern timezone systems are convenient for society, the actual solar position within the same timezone can differ by dozens of minutes or even an hour at different longitudes. **True Solar Time formula:** TST = Clock Time + Longitude Correction + Equation of Time. The longitude correction is based on the difference between the birth longitude and the standard meridian (4 minutes per degree). The Equation of Time corrects for variations in day length caused by Earth's elliptical orbit and axial tilt. **Practical example:** If someone was born at 5:00 PM in Chengdu (longitude 104°E), the longitude correction is approximately (104-120) × 4 = -64 minutes. After adding the day's Equation of Time correction, the True Solar Time might be around 3:58 PM — shifting from You hour (5-7 PM) to Shen hour (3-5 PM), making the entire Hour Pillar completely different. BaziGua has built-in True Solar Time correction. Users simply enter their birth city or longitude, and the system automatically performs all corrections.

一个完整的八字计算器应提供以下输出： **四柱命盘**——年柱、月柱、日柱、时柱，每柱包含一个天干和一个地支。日柱的天干即"日主"，是整个命盘的核心。 **藏干**——每个地支内部包含一到三个隐藏的天干（称为藏干），它们代表地支中蕴含的五行能量。藏干的权重分配遵循《渊海子平》标准：单藏干1.0，双藏干0.7/0.3，三藏干0.6/0.3/0.1。 **五行分布**——统计命盘中木、火、土、金、水五种元素的总体力量分布。这是判断命局平衡与否的基础数据。 **十神关系**——每个天干相对于日主的关系被归类为十种"十神"：正财、偏财、正官、七杀、食神、伤官、比肩、劫财、正印、偏印。十神揭示了命局中各种力量的角色和功能。 **日主旺衰**——通过计算扶助日主的力量与克泄日主的力量之比，判断日主是"身强"还是"身弱"。这一判断直接决定用神的选取方向。 **用神分析**——根据日主旺衰，确定命局最需要的五行元素（用神）和最有利的辅助元素（喜神）。用神分析是八字应用（职业、健康、方位选择等）的理论基础。

A comprehensive Bazi calculator should provide the following outputs: **Four Pillars Chart** — Year, Month, Day, and Hour Pillars, each containing one Heavenly Stem and one Earthly Branch. The Heavenly Stem of the Day Pillar is the "Day Master," the nucleus of the entire chart. **Hidden Stems** — Each Earthly Branch contains one to three hidden Heavenly Stems (called Hidden Stems or Cang Gan), representing the elemental energies within the branch. Their weight distribution follows the Yuan Hai Zi Ping standard: single Hidden Stem 1.0, dual 0.7/0.3, triple 0.6/0.3/0.1. **Five Element Distribution** — A tally of the total strength of Wood, Fire, Earth, Metal, and Water across the chart. This is the foundational data for assessing whether the chart is balanced. **Ten Gods Relationships** — Each Heavenly Stem's relationship to the Day Master is classified into one of ten "Ten Gods": Direct Wealth, Indirect Wealth, Direct Officer, Seven Killings, Eating God, Hurting Officer, Friend, Rob Wealth, Direct Resource, and Indirect Resource. The Ten Gods reveal the roles and functions of various forces in the chart. **Day Master Strength** — By calculating the ratio of forces that support the Day Master versus those that weaken it, the calculator determines whether the Day Master is "strong" or "weak." This assessment directly guides the selection of the Yong Shen. **Yong Shen Analysis** — Based on Day Master strength, the calculator identifies the element the chart needs most (Yong Shen / Power Element) and the most beneficial supporting element (Xi Shen). Yong Shen analysis is the theoretical foundation for practical Bazi applications such as career guidance, health advice, and directional choices.

市面上有众多八字计算器，但质量参差不齐。选择时应注意以下标准： **立春换年规则**——最基本的检验标准。如果一个计算器在农历新年而非立春切换年柱，则其算法基础存在根本性错误。 **节气换月**——月柱的分界应严格按照二十四节气中的"节"来划分，而不是按农历初一。例如，寅月始于立春（约2月4日），而非正月初一。 **真太阳时支持**——如上所述，没有真太阳时校正的计算器在时柱上的准确性无法保证。 **早晚子时处理**——23:00-01:00的子时跨越两个日期。正确的处理方式是：23:00-00:00（晚子时）的天干应按次日推算。 **藏干权重系统**——简单地列出藏干是不够的，还需要按权重计算它们对五行分布的贡献。 **经典来源**——可靠的计算器应基于公认的经典文献（《渊海子平》、《滴天髓》等），并使用标准化术语。BaziGua 采用 Joey Yap 的英文标准术语体系。 **数据隐私**——你的出生信息属于个人敏感数据。选择不需要注册也能使用、或明确保障数据安全的平台。

There are many Bazi calculators available online, but quality varies enormously. Here are the key standards to look for: **Li Chun Year Boundary** — The most basic test. If a calculator switches the Year Pillar at Lunar New Year instead of Li Chun (Start of Spring), its algorithmic foundation is fundamentally flawed. **Solar Term Month Boundaries** — Month Pillar boundaries should follow the "Jie" (sectional terms) among the 24 Solar Terms, not the 1st of each lunar month. For example, the Yin month begins at Li Chun (around February 4th), not the first day of the first lunar month. **True Solar Time Support** — As discussed above, without True Solar Time correction, the accuracy of the Hour Pillar cannot be guaranteed. **Zi Hour Handling** — The Zi hour (23:00-01:00) spans two calendar dates. The correct treatment is: for births during 23:00-00:00 ("Late Zi"), the Day Stem should be calculated based on the following day. **Hidden Stem Weighting** — Simply listing Hidden Stems is not enough — their weighted contributions to the Five Element distribution must be calculated properly. **Classical Sources** — A reliable calculator should be based on recognized classical texts (Yuan Hai Zi Ping, Di Tian Sui, etc.) and use standardized terminology. BaziGua uses Joey Yap's standardized English terminology system. **Data Privacy** — Your birth information is personally sensitive data. Choose platforms that either don't require registration or clearly guarantee data security.

八字计算器排出的命盘只是起点，真正的价值在于解读与应用。 **性格分析**——日主的五行属性（如甲木、丙火、庚金等）结合旺衰状态，可以勾勒出一个人的核心性格特征。例如，旺盛的庚金日主如同锻造好的利刃，性格刚毅果断；弱的庚金则如未经冶炼的矿石，需要火的磨砺和土的支撑。 **职业方向**——月柱十神作为"事业宫"，揭示天然的职业倾向。结合用神五行对应的行业，可以得出具体的职业建议。例如，用神为水的人适合物流、贸易、传媒等流动性强的行业。 **健康提示**——五行失衡对应特定器官系统。木对应肝胆，火对应心脏，土对应脾胃，金对应肺，水对应肾。计算器显示的五行分布可以作为健康关注的参考。 **大运流年**——八字的真正魅力在于时间维度。通过大运（每十年一变）和流年（每年变化）的推演，可以了解人生不同阶段的运势起伏，把握关键时机。 免费使用 BaziGua 八字计算器，即刻开始探索你的命运蓝图。

The chart generated by a Bazi calculator is just the starting point — the real value lies in interpretation and application. **Personality Analysis** — The Day Master's elemental nature (such as Jia Wood, Bing Fire, Geng Metal, etc.) combined with its strength status paints a picture of core personality traits. For example, a strong Geng Metal Day Master is like a forged blade — resolute and decisive; a weak Geng Metal is like unrefined ore, needing Fire's tempering and Earth's support. **Career Direction** — The Month Pillar's Ten God, as the "Career Palace," reveals natural career inclinations. Combined with industries corresponding to the Yong Shen element, specific career advice emerges. For instance, someone whose Yong Shen is Water is well-suited to logistics, trade, media, and other fluid industries. **Health Insights** — Elemental imbalances correspond to specific organ systems. Wood relates to the liver and gallbladder, Fire to the heart, Earth to the spleen and stomach, Metal to the lungs, and Water to the kidneys. The Five Element distribution shown by the calculator serves as a reference for health awareness. **Luck Pillars and Annual Fortune** — The true magic of Bazi lies in its temporal dimension. Through Luck Pillars (changing every decade) and Annual Pillars (changing yearly), one can understand the ebb and flow of fortune across different life phases and seize key opportunities. Try BaziGua's free Bazi calculator now and start exploring the blueprint of your destiny.