Luck pillars calculator

The classical rule pairs polarity with gender: yang year and male, or yin year and female, run forward from the month pillar; the other two combinations run backward. It is an arrangement rule built on the same yin–yang pairing logic that structures the rest of the system, not an empirical claim about men and women.

It is worth seeing how much this one input changes, because most calculators quietly assume an answer. Take the chart used across this site — born 4 February 1990, 10:00 in Taipei, which gives 己巳 丁丑 庚子 辛巳. The year stem 己 is yin.

Read as male, the cycles run backward: the first pillar is 丙子 and the countdown to the previous 节 (小寒) gives a 起运 age of nine years and ten months. Read as female, they run forward instead: the first pillar becomes 戊寅 and, because the birth falls fourteen minutes before 立春, the interval rounds away to a 起运 age of zero. Same date, same minute, same day master — sixteen different characters of luck pillar across the two readings.

If you leave gender blank, the engine applies the yang-year default and says so on the result. That is a stated assumption, not a hidden one.

Classical practice never looked up a 起运 age in a table. It counted the days from the birth to the boundary 节 and divided by three, because three days of real interval stand in for one year of the pillar sequence. Everything after that follows arithmetically: the remainder of a day becomes four months, and the remainder of a day measured in 时辰 becomes ten days each.

The granularity of that count is a 时辰 — two hours. So a birth that falls just after a 节 can produce a 起运 age of zero, and that is not a bug: the interval really is shorter than the smallest unit the classical conversion recognises. Our worked example below lands in exactly that situation if you switch the gender, which is why we show both readings rather than the flattering one.

A 起运 age also comes with a conventional way of naming the blocks. The first block is labelled from the start of the following year — nine years and ten months of interval becomes a first block beginning at age ten — so the fractional part is carried into the block labels rather than discarded.

The ten-year pillar (大运) sets the background for a decade; the annual pillar (流年) sets the year inside it. The annual pillar is pure arithmetic — the year pillar of calendar year Y is position (Y − 4) in the sixty-pillar cycle, because 1984 was 甲子 — which is why the timeline below can run a hundred years forward without a single lookup.

Read together, not separately. A year whose branch clashes with your current luck pillar is doing something different from the same year inside a luck pillar that supports it, even though the annual characters are identical. This is the one relationship on the timeline worth learning first: the annual pillar is always interpreted on top of the decade it falls in.

The timeline marks the current year so you can see which block you are standing in, and how many years of it remain. Everything before your 起运 age sits outside any block, and the timeline shows that early stretch as its own segment rather than assigning it to a pillar that has not started.

Each pillar’s stem has a ten-god name relative to your day master, and the result page states it. That is the part we can compute exactly: the relationship between two characters is fixed by the tables published on the methodology page.

What we do not do is declare a pillar favourable or unfavourable. That judgement needs a strength assessment and a 用神 decision — which element the chart wants more of — and competent practitioners disagree about those, sometimes on the same chart. A tool that stamps “good decade” on a pillar is making a judgement call and presenting it as arithmetic.

So the free result gives you the structure: the direction, the 起运 age, all eight pillars, the ten-god name of each, and a hundred-year timeline. The interpretation is where the Life Map report picks up, and it is written from your chart rather than from the pillar names alone.