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.
Related News
You may be interested in these recent stories from our newsroom.
No related news yet for this tool. Our editorial team publishes new pieces every week.
Browse all news →75 more free tools
Calculators, converters, security tools — no signup.