Saju compatibility
Compare two Four Pillars charts: day masters, branch harmonies and clashes, and how your elements complete each other.
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How saju compatibility works
Korean couples have compared charts for centuries in a practice called gunghap (궁합). Sajuwise looks at three layers:
1. Day Master to Day Master
The strongest bond is a stem combination (天干合): 甲+己, 乙+庚, 丙+辛, 丁+壬 and 戊+癸. These pairs attract like magnets. Clashing pairs such as 甲 and 庚 bring sparks and friction. When one person's element generates the other's (Wood feeds Fire, Fire makes Earth, Earth bears Metal, Metal carries Water, Water nourishes Wood), one tends to support and the other to grow.
2. Earthly branches
The day branch is called the spouse palace. Branches can form a six harmony (子丑, 寅亥, 卯戌, 辰酉, 巳申, 午未), a trine (申子辰, 寅午戌, 巳酉丑, 亥卯未), a clash (子午, 丑未, 寅申, 卯酉, 辰戌, 巳亥) or a harm. Birth-year branches, the zodiac animals most people know, count for less.
3. Element complement
A great match often supplies what you lack. If your chart is light in Water and your partner's chart is full of it, they bring calm, depth and flexibility into your life, and you probably feel it.
Frequently asked questions
What is gunghap?
Gunghap (궁합) is the Korean tradition of comparing two saju charts, historically before marriage. It looks at how the two Day Masters relate, whether the earthly branches harmonize or clash, and whether each person supplies elements the other lacks.
How is the compatibility score calculated?
Sajuwise starts from a neutral base and adds or subtracts points for: a stem combination or clash between Day Masters, the generating or controlling relationship between your elements, harmony, trine, harm or clash between your day branches and birth-year branches, and how much of each person's weakest element the other person carries. Every factor is listed with its points so you can see exactly why.
Does a low score mean we should break up?
No. A low score means your charts pull in different directions, which often brings growth as well as friction. Saju compatibility is a conversation starter, not a verdict.
Is the share link private?
The invite link carries your birth details inside the part after the # sign, which browsers never send to a server. Anyone who has the link can read those details, so share it only with people you trust.