A saju compatibility test for couples — known in Korea as gunghap (궁합) — compares two partners' birth charts to reveal how their personalities and energies fit together. This guide explains how a couple compatibility test works, what Korean relationship compatibility actually measures, what it can and cannot tell a couple, and how to take a free compatibility test from two birth dates in about a minute.
In saju, each partner's birth — year, month, day, and hour — becomes eight characters (사주팔자, saju palja). A compatibility test takes both 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 match is gunghap (궁합), traditionally consulted before marriage and still widely used by couples today.
The key idea is balance. A chart heavy in one element and short in another is not a flaw for a couple — it often means the missing energy is supplied by the other partner. A good test reads how two charts complete, or complicate, one another.
A couple compatibility test is not a single score. It reads the relationship across several layers, each describing a different part of how two people connect.
| Layer | What the test compares |
|---|---|
| Day Masters | The core self of each partner — 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 test does, in seconds, what a traditional reader once did by hand with a perpetual calendar. The process is the same for both partners, then compared.
Every character in a chart belongs to one of the Five Elements (오행, ohaeng). In a couple test, what matters is how the two sets meet — where one partner brings what the other is missing.
| Element | Korean | What it brings to a couple |
|---|---|---|
| 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 test does not decide whether two people belong together, predict a breakup, or replace real conversation. A "difficult" match 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 your result that way and it stays genuinely useful for a couple.
Both. Gunghap was traditionally consulted before marriage, but couples use it at any stage — dating, long-term, or considering marriage. The test simply describes where two temperaments naturally harmonize and where patience matters most.
No. A saju compatibility test describes natural strengths and frictions between two temperaments. Plenty of lasting relationships involve charts that "clash" on paper — the friction simply names where understanding matters most. It is a mirror, not a sentence.
No. The test works from both birth dates alone, comparing the year, month, and day pillars. Adding each partner's birth hour includes the hour pillars and makes the comparison more precise, but a date-only test is still meaningful.
You can take one right here. The free Cheonmyeongdang compatibility test takes two birth dates and hours and returns a plain-English summary of how the two charts fit together.