虎HORAN’SSEOUL · AFTER HOURS
Free tool · runs in your browser

Free saju chart calculator

Enter your birth date on our home page and the free calculator lays out your saju chart, the Korean Four Pillars (BaZi in Chinese, 四柱推命 in Japanese), right in your browser, with no sign-up. Birth time is optional; it adds the hour pillar.

Updated

See your free chart

Birth date only. No sign-up.

What the free chart shows

From your birth date alone, the free chart gives you:

  • your year, month and day pillars, plus the hour pillar if you add a birth time;
  • your day pillar, the part of the chart that stands for you, one of the 60 day pillars;
  • a count of the five elements (wood, fire, earth, metal, water) across the characters it could calculate;
  • the five ten-god families, with the loudest and the quiet ones marked;
  • Horan’s guess about your habits for a concern you pick, and a first look at your 2027 months.

A sample chart, laid out

Here is the chart of Maya, the site’s fictional sample reader, born on March 1, 1998 with no birth time, calculated by the same engine. The free chart shows her pillars, element count and families; this fuller layout adds the traditional rows.

Sample chart: born March 1, 1998 (no birth time)
YearMonthDayHour
Stem 天干戊甲丁—
Branch 地支寅寅未—
Hidden stems 蔵干甲 丙 戊甲 丙 戊己 丁 乙—
Ten god of the stem傷官 Hurting Officer正印 Direct ResourceDay Master (you)—
Ten god of the main hidden stem正印 Direct Resource正印 Direct Resource食神 Eating God—
Twelve stage 十二運死 (quiet focus)死 (quiet focus)冠帯 (wanting to look right)—

Maya is a fictional sample reader, not a customer. With no birth time there is no hour pillar. The words in brackets after each twelve stage are our tendency glosses; 死 and the other stage names are metaphors from a life cycle, not predictions.

How to read a chart in five steps

Start with the day column and work outward.

  • Find your day pillar, the third column. The 60 day pillars describe each one.
  • Its top character is your Day Master, the “you” of the chart (Day Masters).
  • Look at the month branch: the season you were born in, which the tradition weighs heavily (the four pillars).
  • Count the elements: which of wood, fire, earth, metal and water show up, and which don’t (the five elements).
  • Read the ten gods: how each other character relates to your Day Master (the ten gods).

What you need

Only your birth date. A birth time and the time zone of your birthplace are optional. Without them there is no hour pillar, and the day pillar uses your local date.

If you were born within about a day of a seasonal turn (Ipchun, around February 4, or another solar term), your year or month pillar can depend on the hour. The chart leaves that pillar blank rather than guess, and asks for your birth time.

Our rules in brief

The saju year begins at the exact moment of Ipchun, not on January 1 or at Lunar New Year; months begin at the twelve jie solar terms; birth times are converted with the IANA time zone database, including daylight saving time; the day turns at local midnight; hidden stems follow the common 人元 table. Every rule, with sources and the alternatives other sites use, is on how we calculate.

Your birthday stays in your browser

The free chart is calculated on your device. The birth date you type isn’t sent to our server, to an AI or to analytics, and nothing is saved. Only if you continue to the payment screen for a paid reading are your birth details sent to our server and saved with the order (unfinished checkouts are deleted within 7 days). See the privacy policy.

Questions people ask

Is the saju calculator really free?

Yes. The chart and Horan’s first read are free, with no sign-up and no email required. A longer written reading is available to buy if you want one, and you don’t need it to see your chart.

Do I need my birth time?

No. Your birth date gives three pillars and your Day Master. A birth time adds the hour pillar, and it changes the other pillars only if you were born close to midnight or close to a solar-term boundary.

I was born abroad. Which time zone do I use?

The time zone of the place you were born, not where you live now. The engine converts your birth time to an exact moment with that zone’s rules at the time, including daylight saving time.

Why does another calculator give me a different chart?

Calculators pick different conventions: Lunar New Year instead of Ipchun, a 23:00 day boundary, solar-time correction, or another hidden-stem table. Our choices are listed on how we calculate, and why charts differ walks through examples.

Sources

  1. Encyclopedia of Korean Culture: 사주 (saju, E0025957)
  2. Encyclopedia of Korean Culture: 입춘 (Ipchun, E0047822)
  3. IANA Time Zone Database

About this page

Written with AI (Claude) from the sources listed and our calculation engine. Horan and Kachi are fictional characters, and nothing here predicts events. The rules behind every chart: how we calculate.

Your chart, free, in your browser

Birth date only. No sign-up. Nothing is saved or sent.

See your free chart

Birth date only. No sign-up.