What Is BaZi? The Four Pillars Chart Explained in Plain English

BaZi (八字, said "bah-dzuh") is a way of writing down the moment you were born using eight Chinese characters. Each character stands for one of five elements: Wood, Fire, Earth, Metal or Water. If you've ever looked at a Western birth chart, the idea is similar. The difference is that BaZi is built from the calendar, not from where the planets were.

That's the whole idea in two sentences. The rest of this guide walks through one real chart, slowly, so you can see where the eight characters come from and what people actually do with them.

Why it's called "eight characters"

BaZi literally means "eight characters." You get them from four pieces of birth information: the year, the month, the day and the hour.

Each of those becomes a pillar, and each pillar holds two characters, one above the other. Four pillars, two characters each. That's eight, and it's why you'll also see BaZi called the Four Pillars.

The two characters in each pillar

The top character is called a Heavenly Stem. There are ten of them. Each one is an element in either its yang or yin form, so you get yang Wood and yin Wood, yang Fire and yin Fire, and so on down the list.

The bottom character is an Earthly Branch. There are twelve, and you probably know them already: they're the twelve animals of the Chinese zodiac. Rat, Ox, Tiger, Rabbit and the rest. Each animal carries an element too.

You don't need to memorize either list. Any calculator does the lookup for you. The useful part to remember is that every character in a chart points back to one of the five elements.

A real chart, read slowly

Here's the chart for someone born on March 14, 1994, at 8:30 in the morning. We picked the date at random.

	Hour	Day	Month	Year
Stem	戊 Wu yang Earth	己 Ji yin Earth	丁 Ding yin Fire	甲 Jia yang Wood
Branch	辰 Chen Dragon, Earth	亥 Hai Pig, Water	卯 Mao Rabbit, Wood	戌 Xu Dog, Earth

Traditional charts are read right to left, so the year sits on the far right. Some apps flip the order. Either way works as long as you know which column is which.

Once it's laid out, a few things stand out:

• The year pillar is the part you may already know. 1994 was a Wood Dog year, so this person would find "Dog" on the zodiac placemat at a Chinese restaurant. In BaZi, that's one pillar out of four.
• Earth shows up a lot. Count the elements across all eight characters and Earth appears four times. Wood appears twice, Fire once, Water once.
• Metal doesn't show up at all among the eight characters you can see.

That simple count is where most beginner tools stop, and it's close to what Orileva's Element Reading shows you. It's a good first look. It isn't the whole picture, which we'll get to in a minute.

The Day Master, in one sentence

The top character of the day pillar is called the Day Master, and traditional readers use it as the anchor of the chart: everything else is read in relation to it.

In our example, that's 己 (Ji), yin Earth. So if this person asked a BaZi reader "what's my element?", the reader would most likely start here, not with the year. It's also why two people born in the same year can get very different answers.

Three things that trip up beginners

The year doesn't start on January 1. In BaZi, the year turns over around February 4, the old solar calendar's start of spring. It isn't tied to Lunar New Year either. If you were born in January or the first days of February, your BaZi year is probably the one before. The months work the same way and change around the 4th to the 8th of each month.

The hour comes in two-hour blocks. 7:00 to 9:00 a.m. is the Dragon hour, so a birth at 8:30 and one at 7:15 share the same hour pillar. If you were born close to the edge of a block, it's worth checking both. The hour is read from the clock where you were born, with one adjustment: during daylight saving time that clock runs an hour ahead, so the hour is counted from standard time instead. That's why the Element Reading lets you choose the time zone you were born in.

Your zodiac animal and your element are different things. "I'm a Dog" describes the year branch. "I'm Earth" usually means the Day Master. They come from different pillars, so they often don't match.

What a full reading looks at that a simple count doesn't

Counting elements is a bit like judging a dish by its ingredient list. You can tell a lot, but not how it was cooked.

A trained reader also looks at the season. Our example person was born in spring, which is Wood's season, and that changes how Wood is read even though it only appears twice. They'll look inside the animals, too. Each branch carries one to three "hidden" elements, and in this chart the Dog quietly holds a little Metal. So the Metal that looked absent from the count isn't entirely missing.

Professional practitioners go further still, into cycles of time and relationships with names like the Ten Gods. You don't need any of that to get something out of your own chart, but it's worth knowing it exists, so a simple count doesn't feel like a final word.

What BaZi can and can't tell you

A reasonable thing to use it for	Asking more than a chart can give
Learning how the Four Pillars are built	A full account of who you are
Noticing which elements show up a lot, or a little	Proof that you lack something, like courage or calm
Finding a question you wouldn't have thought to ask yourself	A medical or psychological assessment
Starting an honest bit of private reflection	A prediction about a relationship, a job or a date

Some traditional practitioners do use BaZi to predict. Orileva doesn't, and that's on purpose. We treat a chart as a place to start writing, not a verdict.

How Orileva uses it

The Element Reading takes your birth details, shows a simplified view of your pattern, and turns it into a question you can write about tonight. If Metal is quiet in your chart, the question might be something like What becomes clear when I stop trying to keep everything?

You can take the suggestion or ignore it. Your chart doesn't know you're in the middle of a move, or a breakup, or an unusually good month. You do. That's why we use the five elements as five ways of looking at a question, not five types of people.

And if an element turns up quiet in your chart and that bothers you a little, read what it means when Fire appears quiet. The same thinking applies to any of the five.

Questions people ask

Is BaZi the same as the Chinese zodiac?

The zodiac animal is one part of BaZi: the bottom half of your year pillar. BaZi uses all four pillars, so it has seven more characters to work with.

Do I need my exact birth time?

It helps. The hour gives you the fourth pillar. Without it you have six characters instead of eight, which is still plenty for a first look. The Element Reading lets you leave the hour blank.

Does it matter where I was born?

A little. Your day and hour come from the local time where you were born, with daylight saving taken out. The year and month work differently. They change at moments that happen at the same instant everywhere, so in some years someone born on the evening of February 3 in Los Angeles is already in the new BaZi year. The Element Reading handles both when you choose the time zone you were born in. If you leave it blank, it uses the time zone you're in now.

Is my element the Day Master or the one that shows up most?

People use "your element" for both, which is confusing. In traditional BaZi the Day Master is the anchor. The element that shows up most is simply the most frequent one. Neither sums you up. What Element Am I? goes through the four answers people usually mean.

Does BaZi predict the future?

Some practitioners use it that way. We don't. The Element Reading sticks to the basic pattern and a question to write about.

If you'd like to see your own eight characters laid out, try the free Element Reading. Or skip the chart entirely and start with whichever of the five perspectives fits the week you're having.

For background on how the Heavenly Stems and Earthly Branches mark time, see the Hong Kong Observatory's overview.