Ba Zi (Eight Characters / 鍏瓧) is a sophisticated astrological system that maps your birth time to a chart of Heavenly Stems and Earthly Branches. Your chart reveals the balance of Five Elements (Wood, Fire, Earth, Metal, Water) that influence your personality, relationships, and fortune. Free, instant — just enter your birthday.
A Ba Zi (八字 / Eight Characters) Calculator generates your Four Pillars of Destiny birth chart — a sophisticated metaphysical system used for over 1,000 years for understanding personality, relationships, career direction, and life timing. Your chart consists of four pillars (Year, Month, Day, Hour), each containing a Heavenly Stem (天干) and an Earthly Branch (地支), totaling eight characters. The Day Stem is your 'Day Master' — it represents YOU. The balance of Five Elements (Wood, Fire, Earth, Metal, Water) across your chart reveals your innate tendencies, strengths, and areas for growth.
Enter your birth year, month, day, and hour. The calculator converts these into the traditional sexagenary (60-term) cycle, mapping each time unit to its Heavenly Stem (10 possible: 甲 through 癸) and Earthly Branch (12 possible: 子 through 亥, corresponding to the 12 animal signs). Your Day Stem becomes your Day Master element (Wood/Fire/Earth/Metal/Water, each with Yang or Yin polarity). The chart reveals Five Element balance and your core personality archetype.
Year Stem = Stems[(Year − 4) mod 10], Year Branch = Branches[(Year − 4) mod 12]\nMonth Stem = Stems[(Year×12 + Month + 13) mod 10], Month Branch = Branches[(Month + 1) mod 12]\nDay Stem & Branch calculated via long-count day formula (fixed reference: Jan 1, 1900 = 甲子 day)\nHour Branch = floor((Hour+1)/2) mod 12, Hour Stem determined from Day Stem\n\nFive Elements: 甲乙=Wood, 丙丁=Fire, 戊己=Earth, 庚辛=Metal, 壬癸=Water\n\nDay Master archetypes:\nWood: Growth-oriented, flexible, idealistic\nFire: Passionate, dynamic, charismatic\nEarth: Stable, nurturing, practical\nMetal: Disciplined, principled, determined\nWater: Intuitive, wise, adaptable
The Hour Pillar represents your inner self, relationship with children/subordinates, and later life. Each two-hour block (Chinese 'double-hour') has a different Earthly Branch. Without birth hour, the chart is incomplete — though Year+Month+Day still give meaningful information.
Ba Zi is used for character analysis and timing guidance, not deterministic fortune-telling. It identifies tendencies, strengths, and cyclical patterns — similar to how a weather forecast predicts likely conditions, not guaranteed outcomes. Use it for self-understanding, not life decisions.
Free online Ba Zi Five Elements Fortune — no signup, 100% client-side processing. All data stays in your browser.