Major Luck cycle calculator. Computes 10 cycles of 10-year periods from bazi + gender — each with GanZhi, start year/age, end age, Ten God, 5-element. Highlights your current cycle. Cultural reference only.
Major Luck Cycle Calculator (大运排盘)
Your birth information
How to use
Enter birth info
Gregorian date + birth hour + gender. Male/female have different start age formulas.
Read your start age
Start age = years from birth to your first major-luck cycle. Typically 0-10 years.
Read the 10 cycles
Each cycle = 10 years. Tool shows GanZhi + start year/age + end age + Ten God (vs your Day Master) + 5-element.
Locate current cycle
Red-marked row = the cycle you're currently living through.
Major Luck (大运) — 10-Year Cycles in Bazi
Major Luck (大运) is the second-major dynamic layer of Chinese bazi (the first is annual luck). From birth onward, each person follows 10-year cycles of "Major Luck", each with its own GanZhi (stem-branch) that interacts with the natal bazi to define the 10-year energy trajectory.
Start age (起运岁数)
Start age = time from birth to the first major-luck cycle. Calculation: yang-male / yin-female forward (count to next solar term), yin-male / yang-female backward (count to previous solar term). Each day in the ancient formula = 4 months — so start ages typically fall 0-10 years.
Major Luck vs Annual Luck
Major Luck = the 10-year trend. Annual Luck (流年) = each year\'s specific energy. Consultants often say "Good Major + Bad Annual = peace" or "Bad Major + Bad Annual = trouble" — the two layers combine for prediction.
Practical value
Knowing which periods are "good fortune phases" lets you plan ahead: launch businesses, buy houses, marry during favorable cycles; preserve capital during weaker cycles. SG/MY/HK/TW bazi consultations typically open with "your next major luck cycle starts at age X".
10 Facts about Major Luck
Start age is not fixed — earliest 0, latest 10 years. Determined by: birth date + gender + nearest solar term boundary.
Direction varies by gender + day master — yang-male / yin-female go forward from month pillar; yin-male / yang-female go backward.
10 years is a statistical average. Traditional bazi splits each cycle into "first 5 years = Heavenly Stem, last 5 years = Earthly Branch" sub-phases.
"Cycle transitions" (交大运) — moving from one cycle to the next — are the most critical periods. Bazi theory holds that the 3 years around a transition are physical/psychological adjustment periods with major decisions + health flux.
Life-stage mapping: 1st cycle (childhood) = formative; 2nd-3rd (youth) = career building; 4th-5th (middle age) = peak; 6th-7th (later years) = harvest + reflection.
Edward Li (HK's top bazi consultant, 2024 net worth in the hundreds of millions) sells annual fortune reports built around the Major Luck + Annual Luck framework — HK$2,800-6,800 per report.
Cycle auspiciousness depends on how the cycle's GanZhi relates to your bazi's "useful god / lucky/avoid elements" (see RT-CHN-059). Cycles supporting your useful god = good; cycles weakening it = challenging.
Female charts traditionally emphasize different aspects: more focus on "Husband Stars" (Qi Sha / Zheng Guan) appearing in cycles, reflecting traditional family context. Modern interpretations have softened this distinction.
This tool computes up to age 100 (10 cycles). Practically, the first 7-8 cycles (ages 0-80) cover most lifespans.
Pairs with RT-CHN-001 (Bazi Chart) + RT-CHN-057 (Ten Gods) + RT-CHN-059 (Useful God) — 4 tools together = complete personal bazi baseline analysis.
Frequently Asked Questions
Count forward to the next solar term (yang-male / yin-female) or backward to the previous (yin-male / yang-female). Each 3 days = 1 year. Start age typically falls 0-10.
Both matter. Consultants combine them: Major Luck sets the 10-year trend (career, health, relationships); Annual Luck reveals the specific year's details. Effect is strongest when both align.
Requires useful god / avoid analysis (see RT-CHN-059). Simple rule: cycles whose GanZhi favors your "useful god" = good. Cycles aligned with your "avoid" = neutral-to-challenging. This tool shows GanZhi + 5-element for comparison.
Yes. Based on lunar-javascript (MIT) using the standard bazi algorithm. Results match mainstream paid apps like 易奇八字 / 亿吉运程.
Not necessarily all relevant. 10 cycles cover to 100, but the practically meaningful ones are the first 7-8 (ages 0-80). The last 2-3 (80+) are relevant if you reach those ages, otherwise reference only.
Traditional yin-yang balance concept. Yang-male / yin-female go forward; yin-male / yang-female go backward — so each person's cycles maintain "yin-yang harmony". This is internal consistency of the bazi system, not gender discrimination.
Bazi believes yes. Common methods: (1) feng shui adjustments (house direction); (2) colors + directions (see RT-CHN-059); (3) avoid high-risk decisions (no major investments or marriages in challenging cycles); (4) cultivate good karma.
Enter your birth info — the red-highlighted row in the table shows your current cycle, including start and end years.
This tool is baseline charting — calculates + displays cycles. Professional consultation integrates: deep interpretation, major life decision advice, feng shui remedies, amulet recommendations, personalized strategy. Costs SGD 200-2,000+ per session.
Yes. All RECATOOLS tools are 100% free, ad-supported. No signup, no paywall.
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