Saju compatibility — known in Korea as gunghap (궁합) — compares two people's birth charts to describe how their personalities and energies fit together. This guide explains what Korean love compatibility actually measures, how saju matching for couples is calculated, what it can and cannot tell you, and how to get a free compatibility analysis from two birth dates.
In saju, each person's birth — year, month, day, and hour — becomes eight characters (사주팔자, saju palja). Compatibility takes two of those charts and reads how they relate: where they reinforce each other, where they rub, and how their natural rhythms line up. The Korean word for this is gunghap (궁합), traditionally consulted before marriage and still widely used by couples today.
The key idea is balance. A saju chart that is heavy in one element and short in another is not a flaw — it simply means the missing energy may be supplied by a partner whose chart is rich in it. Compatibility is the study of how two charts complete, or complicate, one another.
Good gunghap is not a single score. It reads the relationship across several layers, each describing a different part of how two people connect.
| Layer | What it compares |
|---|---|
| Day Masters | The core self of each person — how the two fundamental temperaments naturally interact, support, or challenge each other. |
| Five Elements balance | Whether one partner's abundant elements fill what the other lacks, creating a sense of completeness. |
| Sip-sin (Ten Gods) | Relational roles — how each chart reads the other in terms of support, attraction, and responsibility. |
| Life-cycle timing | Whether the two ten-year cycles (대운, daewoon) are moving in harmony or in different seasons. |
An online compatibility reading does, in seconds, what a traditional reader once did by hand with a perpetual calendar. The process is the same for both people, then compared.
Every character in a chart belongs to one of the Five Elements (오행, ohaeng). In compatibility, what matters is how the two sets meet — where one partner brings what the other is missing.
| Element | Korean | What it brings to a pairing |
|---|---|---|
| Wood 木 | 목 (mok) | Growth, vision, and shared direction |
| Fire 火 | 화 (hwa) | Warmth, passion, and expressiveness |
| Earth 土 | 토 (to) | Stability, trust, and steady ground |
| Metal 金 | 금 (geum) | Structure, loyalty, and clear boundaries |
| Water 水 | 수 (su) | Understanding, intuition, and emotional flow |
Honesty matters here. A compatibility reading does not decide whether two people belong together, predict a breakup, or replace real conversation. A "difficult" pairing is not doomed, and an "easy" one is not guaranteed. Gunghap is a centuries-old language for describing how two temperaments meet — a starting point for understanding each other, not a verdict. Read it that way and it stays genuinely useful.
No. A compatibility reading works from both birth dates alone, comparing the year, month, and day pillars. Adding each person's birth hour includes the hour pillars and makes the comparison more precise, but a date-only reading is still meaningful.
No. Saju compatibility describes natural strengths and frictions between two temperaments. Plenty of lasting relationships involve charts that "clash" on paper — the friction simply names where understanding and patience matter most. It is a mirror, not a sentence.
They share the same eight-character root. Gunghap (궁합) is the Korean tradition, which leans on the Sip-sin (Ten Gods) relational style — reading each chart in relation to the other's Day Master.
You can get one right here. The free Cheonmyeongdang compatibility analysis takes two birth dates and hours and returns a plain-English summary of how the two charts fit together.