What is BaZi (Four Pillars of Destiny)?

BaZi (八字), also known as Four Pillars of Destiny or Eight Characters, is a 3,000-year-old Chinese astrological system that analyses your birth year, month, day, and hour to derive four 'pillars'. Each pillar consists of a Heavenly Stem and an Earthly Branch, encoding the Five Elements (Wood, Fire, Earth, Metal, Water) present at the moment of your birth. BaZi reveals your elemental constitution, personality traits, health tendencies, and life potential.

What is a Day Master in BaZi?

The Day Master (日主) is the Heavenly Stem of your Day Pillar and represents your core self in BaZi. It is one of the ten Heavenly Stems: Jiǎ Wood (甲), Yǐ Wood (乙), Bǐng Fire (丙), Dīng Fire (丁), Wù Earth (戊), Jǐ Earth (己), Gēng Metal (庚), Xīn Metal (辛), Rén Water (壬), or Guǐ Water (癸). The Day Master's element and its strength relative to the other chart elements determines your TCM constitutional type and health tendencies.

What is a TCM body constitution?

Traditional Chinese Medicine (TCM) classifies individuals into nine body constitution types based on the balance of Qi (vital energy), Yin, Yang, and the Five Elements. The nine constitutions are: Balanced/Neutral (平和质), Qi Deficiency (气虚质), Yang Deficiency (阳虚质), Yin Deficiency (阴虚质), Phlegm-Dampness (痰湿质), Damp-Heat (湿热质), Blood Stasis (血瘀质), Qi Stagnation (气郁质), and Special/Allergic (特禀质). Your constitution determines your susceptibility to certain illnesses, your ideal diet, exercise type, and seasonal adjustments for optimal health.

What is Qi Deficiency TCM body constitution?

Qi Deficiency (气虚质) is one of the nine TCM body constitution types characterised by low vital energy (Qi). Symptoms include chronic fatigue, breathlessness on exertion, excessive sweating, frequent colds and infections, weak voice, and low immunity. In BaZi, it often correlates with a weak Day Master that lacks support from other elements. Recommended foods include Chinese yam (山药), astragalus (黄芪), goji berries, and warming rice porridge (congee). Gentle exercises like Tai Chi and Qigong are preferred over intense workouts. Biohack.BaZi identifies Qi Deficiency constitution automatically from your birth chart.

What is Yang Deficiency TCM body constitution?

Yang Deficiency (阳虚质) TCM constitution is characterised by insufficient Yang (warming) energy. Symptoms include cold hands and feet, intolerance to cold, low metabolism, frequent urination especially at night, low libido, and low energy in winter. In BaZi, it commonly appears in Water-dominant charts or charts with weak Fire. Warming foods like ginger, cinnamon, lamb, and walnuts are recommended. Moxibustion on key acupuncture points, early morning sun exposure, and avoiding cold foods and drinks help manage this constitution. Biohack.BaZi detects Yang Deficiency from your elemental balance.

What is Yin Deficiency TCM body constitution?

Yin Deficiency (阴虚质) is characterised by insufficient Yin (cooling, moistening) energy. Symptoms include afternoon low-grade fever, night sweats, dry mouth, insomnia, restlessness, dry skin, hair thinning, and hot sensations in palms and soles (五心烦热). It commonly appears in Fire-dominant BaZi charts or charts with excessive Metal. Cooling, moistening foods like white fungus (银耳), lily bulb, pear, and duck meat are recommended. Meditation, swimming, and avoiding spicy food and late nights are advised. Biohack.BaZi's AI identifies Yin Deficiency from your Five Elements balance.

What is Phlegm-Dampness TCM body constitution?

Phlegm-Dampness (痰湿质) constitution is one of the most common in modern sedentary lifestyles. Symptoms include a heavy, sluggish feeling, tendency to gain weight easily, excessive phlegm production, greasy or oily skin, abdominal bloating, and foggy thinking. In BaZi, it is often associated with Earth-dominant charts where digestion (Spleen/Stomach) is overloaded. Key dietary advice: avoid sugar, dairy, cold drinks, and greasy food. Increase bitter and pungent flavours. Regular brisk walking and strength training help. Biohack.BaZi uses your BaZi elemental imbalances to detect Phlegm-Dampness constitution.

What is Damp-Heat TCM body constitution?

Damp-Heat (湿热质) constitution involves a combination of internal dampness and heat. Symptoms include oily or acne-prone skin, bitter taste in the mouth, yellow-tinged complexion, heavy bowel movements, irritability, and dark yellow urine. In BaZi, excess Earth and Fire elements often contribute to this pattern. Recommended foods include bitter melon (苦瓜), mung beans, lotus seeds, and barley water. Avoid alcohol, fatty meats, spicy food, and excessive sun exposure in summer. Stress management and regular exercise are critical.

What is Blood Stasis TCM body constitution?

Blood Stasis (血瘀质) constitution involves impaired blood circulation. Symptoms include a dark or dull complexion, dark circles under the eyes, dry and rough skin, fixed or stabbing pains, irregular menstruation with dark clots, varicose veins, and a tendency to bruise easily. In BaZi, this may correlate with excess Metal or a chart with suppressed Qi flow. Foods that promote circulation include hawthorn (山楂), turmeric, black fungus (黑木耳), and red wine in moderation. Aerobic exercise and avoiding prolonged sitting are essential. Biohack.BaZi's AI analysis identifies Blood Stasis tendencies.

What is Qi Stagnation TCM body constitution?

Qi Stagnation (气郁质) is characterised by depressed or stagnant vital energy flow, primarily affecting the Liver meridian. Symptoms include emotional sensitivity, depression, anxiety, frequent sighing, chest and rib-side tightness, premenstrual syndrome (PMS), and bloating. In BaZi, this often appears in Wood-dominant charts where the Liver energy is trapped. Liver-supporting foods like green vegetables, sour fruits, rose petals (玫瑰花 tea), and jasmine tea are recommended. Creative expression, journaling, breathwork (pranayama), and social connection are powerful remedies.

What is the Special or Allergic TCM body constitution?

The Special/Allergic (特禀质) TCM constitution involves hereditary or congenital hypersensitivities. Symptoms include allergic rhinitis, asthma, eczema, urticaria (hives), drug and food allergies, and immune hypersensitivity. In BaZi, unusual elemental combinations or very extreme elemental imbalances may suggest this constitution. Management involves strengthening Wei Qi (defensive energy) with astragalus (黄芪), avoiding known triggers, maintaining a stable daily routine, and using anti-inflammatory diets. Biohack.BaZi's AI flags Special constitution tendencies when detected.

How does BaZi relate to TCM body constitution?

Both BaZi and TCM use the same Five Elements (Wu Xing) framework. Your BaZi chart reveals which elements are dominant or deficient in your energetic constitution. An excess of Wood may indicate Liver-related tendencies (Qi Stagnation); excess Fire points to Heart/inflammation patterns (Yin Deficiency); excess Earth to digestive and dampness issues (Phlegm-Dampness); excess Metal to Lung/respiratory patterns; and excess Water to Kidney-related concerns (Yang Deficiency). The AI at Biohack.BaZi cross-references your elemental balance with all nine TCM constitutional types to generate your personalised health profile.

What are the Five Elements in Chinese medicine and their health meanings?

The Five Elements (五行, Wǔ Xíng) are Wood (木), Fire (火), Earth (土), Metal (金), and Water (水). In TCM they correspond to organ systems: Wood = Liver/Gallbladder (emotions: anger, tendons, eyes); Fire = Heart/Small Intestine (emotions: joy, blood vessels, tongue); Earth = Spleen/Stomach (emotions: worry, muscles, mouth); Metal = Lung/Large Intestine (emotions: grief, skin, nose); Water = Kidney/Bladder (emotions: fear, bones, ears). They interact through the Generating Cycle (Sheng: Wood→Fire→Earth→Metal→Water→Wood) and the Controlling Cycle (Ke: Wood controls Earth, Earth controls Water, Water controls Fire, Fire controls Metal, Metal controls Wood).

Is this BaZi calculator free?

Yes. Biohack.BaZi provides a completely free BaZi birth chart analysis, Five Elements elemental balance visualisation, Day Master identification and strength assessment, and AI-generated TCM body constitution profile including dietary, exercise, herbal, and lifestyle recommendations. To unlock the Daily Pro Forecast (luck score, love/career/health readings, and I-Ching daily flow state), you register with your name, email, and phone number at no cost.

How accurate is the BaZi calculation?

Biohack.BaZi uses the lunar-javascript library for precise Chinese calendar (Tung Shing) conversions and applies solar time correction based on birth city longitude for 120+ cities worldwide. Day Master strength is calculated using the authentic 旺相休囚死 (Prosperous-Supported-Resting-Imprisoned-Dead) five-phase seasonal theory with real-time seasonal modifiers. Lucky elements are determined deterministically using authentic Five Elements generating/controlling cycles — making this one of the most technically rigorous free BaZi calculators available online.

What are lucky elements in BaZi (用神 Yong Shen)?

Lucky elements (用神, Yòng Shén) in BaZi are the elements that bring balance, support, and positive outcomes for your Day Master. If your Day Master is strong (prosperous or over-prosperous), your lucky elements are typically those that weaken or drain it. If your Day Master is weak (imprisoned or dead), lucky elements are those that generate and support it. Knowing your lucky elements guides choices in food colours, home and office colours, career sectors, travel directions, and daily lifestyle for optimal wellbeing and productivity.

What is the difference between BaZi and Western astrology?

Western astrology is primarily solar-based, dividing the year into 12 zodiac signs and analysing planetary positions. BaZi is based on the Chinese lunisolar calendar and analyses four pillars (Year, Month, Day, Hour) using Heavenly Stems and Earthly Branches encoding the Five Elements. BaZi focuses on elemental constitution, health tendencies, and life potential. Biohack.BaZi integrates both: BaZi for TCM health insights and Western astrology for personality context.

What is the difference between BaZi and the Chinese Zodiac?

The Chinese Zodiac only reads your birth year — the animal sign (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig) shared by everyone born that year. BaZi uses your full birth date, exact time, and birth city to produce 8 unique characters across 4 pillars, calculating your individual elemental balance, Day Master identity, and strength. BaZi is exponentially more personalised and is the foundation of Chinese metaphysics health analysis.

What health recommendations does the BaZi AI analysis provide?

Based on your BaZi elemental balance and TCM constitution type, Biohack.BaZi's AI (Google Gemini 2.5 Flash) provides: personalised dietary recommendations aligned with your element deficiencies, exercise and movement guidance (e.g. strength training for Earth types vs. gentle Qigong for Water types), sleep protocols, seasonal health warnings and organ focus areas, TCM-aligned herb and supplement suggestions, essential oil and aromatherapy blends for each element, and daily wellness forecasts with luck scoring based on current Heavenly Stem/Earthly Branch cycles.

What is biohacking and how does Chinese BaZi fit in?

Biohacking is the science of optimising human biology through data, lifestyle design, targeted nutrition, and supplementation. BaZi provides something no wearable can measure — your constitutional baseline, an elemental blueprint derived from birth that informs your innate organ system strengths and vulnerabilities. By combining BaZi elemental analysis with modern biohacking (sleep optimisation, cold therapy, circadian alignment, precision nutrition), individuals create highly personalised protocols. Biohack.BaZi bridges 3,000-year-old Chinese metaphysics with AI to make ancient wisdom immediately actionable.

What is the I-Ching daily forecast on Biohack.BaZi?

The I-Ching (易經) daily forecast on Biohack.BaZi is presented as the 'Daily Flow State Index and Energy Trend Analytics'. It generates a daily hexagram using a deterministic timestamp-based Qimen-style selection, producing a luck score (0-100), elemental energy reading for the day, and personalised guidance for love, career, and health — all calibrated to your specific BaZi chart and the current day's Heavenly Stem and Earthly Branch cycle.

How do Heavenly Stems and Earthly Branches work in BaZi?

The 10 Heavenly Stems (天干, Tiān Gān) are: Jiǎ (甲 Yang Wood), Yǐ (乙 Yin Wood), Bǐng (丙 Yang Fire), Dīng (丁 Yin Fire), Wù (戊 Yang Earth), Jǐ (己 Yin Earth), Gēng (庚 Yang Metal), Xīn (辛 Yin Metal), Rén (壬 Yang Water), Guǐ (癸 Yin Water). The 12 Earthly Branches (地支, Dì Zhī) correspond to the 12 Chinese zodiac animals and contain Hidden Stems (藏干) that add elemental nuance. Together they produce 60 unique combinations forming the sexagenary cycle (六十甲子), the foundation of all BaZi calculations.

What languages does Biohack.BaZi support?

Biohack.BaZi supports English and Simplified Chinese (简体中文). The full BaZi analysis, TCM constitution profile, dietary recommendations, and daily forecast are available in both languages. Switch languages using the toggle on the results page.

What is Day Master strength in BaZi?

Day Master strength measures how powerful or weak your core elemental self is relative to the other elements in your chart. It is assessed using the 旺相休囚死 (Wang-Xiang-Xiu-Qiu-Si) five-phase system: Prosperous (旺) = maximum strength in your element's season; Supported (相) = strong with external support; Resting (休) = moderate; Imprisoned (囚) = weakened; Dead (死) = minimal. Seasonal adjustments, hidden stems, and all four pillar interactions are calculated to determine your final strength score.

How do I know my TCM body constitution by birth date?

Enter your birth date, birth time, gender, and birth city into the Biohack.BaZi free BaZi calculator at biohackmybazi.com. The app calculates your Four Pillars chart, Five Elements balance, and Day Master strength, then uses Google Gemini AI to match your elemental profile to one or more of the nine TCM body constitution types. The result includes your dominant constitution, secondary patterns, organ system focus areas, dietary recommendations, and personalised lifestyle guidance — all in under 60 seconds.

What is Feng Shui lucky element and how is it calculated?

Your Feng Shui lucky element — formally called Yong Shen (用神) or beneficial element in BaZi — is the Five Element that most benefits your Day Master based on your unique Four Pillars chart. Unlike simplified Feng Shui birth year tables that give generic answers to entire cohorts, BaZi calculates your lucky element based on your personal elemental balance across all four pillars. Biohack.BaZi uses authentic Five Elements generating and controlling cycle logic to determine your personal lucky element, auspicious colours, career sectors, compass directions, and foods.

Can BaZi predict health issues?

BaZi does not 'predict' health issues in a medical sense. Instead, it reveals your constitutional tendencies — which organ systems are structurally more vulnerable based on your elemental imbalances. For example, a chart with very weak Water may indicate Kidney/adrenal vulnerability and bone density concerns over time. These are predispositions, not diagnoses. Biohack.BaZi uses this insight to provide preventive wellness guidance aligned with TCM principles. All recommendations are for educational purposes only and do not replace professional medical advice.

Free BaZi Calculator & AI Body Constitution Scanner | Biohack.BaZi

Biohack.BaZi is the world's most advanced AI-powered BaZi (Four Pillars of Destiny) calculator. Enter your birth date, time, and city to instantly receive:

Your complete Four Pillars BaZi birth chart with Heavenly Stems and Earthly Branches
Five Elements (Wood, Fire, Earth, Metal, Water) elemental balance visualisation
Day Master identification and 5-level strength analysis
AI-generated Traditional Chinese Medicine (TCM) body constitution profile
Personalised dietary, exercise, and wellness recommendations
Lucky elements calculation based on authentic Five Elements theory
Daily wellness forecast with luck score, love, career, and health insights
I-Ching inspired daily flow state index
PDF report download
Bilingual support: English and Simplified Chinese

What is BaZi?

BaZi (八字), or Four Pillars of Destiny, is a 3,000-year-old Chinese astrological system derived from your birth year, month, day, and hour. Each of the four pillars encodes the Five Elements at the moment of your birth, revealing your elemental constitution, personality, and health tendencies.

How to Use the BaZi Calculator

Enter your birth date
Enter your birth time (as accurate as possible for the Hour Pillar)
Select your gender
Choose your birth city (120+ cities supported with solar time correction)
Click Scan to receive your full AI-powered BaZi analysis
Register free to unlock your Daily Pro Forecast

TCM Body Constitution Types

Traditional Chinese Medicine identifies 9 constitution types: Balanced, Qi Deficiency, Yang Deficiency, Yin Deficiency, Phlegm-Dampness, Damp-Heat, Blood Stasis, Qi Stagnation, and Special (Allergic). Your BaZi elemental profile maps to one or more of these constitutions, guiding personalised health choices.

BaZi and Biohacking

Biohacking is the science of optimising human biology. BaZi provides a personalised elemental blueprint that complements modern biohacking protocols — helping you align nutrition, sleep, exercise, and supplementation with your unique constitutional needs.

Biohack.BaZi — TCM x AI Metaphysics | biohackmybazi.com

This tool is for educational and wellness purposes only. It is not a substitute for professional medical advice.