Synastry & Compatibility — Reading Two Charts Together

Vedic astrology has a long tradition of analyzing the compatibility between two charts — most famously for marriage, but the same techniques apply to business partners, parent-child relationships, and any pairing where understanding the dynamic matters.

KarmaWheel includes four complementary tools for this: Ashtakoota matching, Bi-Wheel comparison, HITS (inter-chart aspects), and an AI-written synastry interpretation.

The classical approach: Ashtakoota

The most well-known Vedic compatibility method is Ashtakoota Milan — "the meeting of eight kootas." It scores compatibility out of 36 points, comparing the two charts' Moon nakshatras across eight categories.

The eight kootas:

A score of 18+ is considered acceptable; 24+ is good; 28+ is very good. Anything below 18 is classically discouraged for marriage.

A few important things to know:

• Nadi dosha (when both partners share the same nadi) is treated as the most serious incompatibility — losing all 8 nadi points is often considered grounds to reconsider regardless of total score
• Bhakoot dosha (certain Moon-sign relationships) is also examined carefully
• Ashtakoota alone is not enough — it should always be supplemented with chart-by-chart analysis (see below)

Beyond Ashtakoota: full chart compatibility

Modern Vedic practice goes well beyond Ashtakoota's 36 points. KarmaWheel computes:

Bi-Wheel (the inner and outer chart)

Both charts overlaid — chart A in the inner wheel, chart B in the outer (or vice versa). Lets you see at a glance:

• Where partner B's planets fall in partner A's houses (and vice versa)
• Conjunctions (planet A on top of planet B)
• Aspects (one chart's planet aspecting another's)
• "Activation" patterns — which of partner A's houses get hit by partner B's planets

For example: partner B's Jupiter falling on partner A's 5th house is classically auspicious (Jupiter activates the partner's children/joy/intelligence house). Partner B's Saturn on partner A's 7th can show a relationship marked by responsibility and patience — sometimes hardship.

HITS (Inter-Chart Hits)

A specialized analysis showing every meaningful aspect or conjunction between the two charts, scored by intensity. Look here for:

• Strong Venus-Mars contacts (sexual chemistry)
• Strong Jupiter contacts (mutual blessing)
• Strong Saturn contacts (responsibility, sometimes restriction)
• Strong Rahu/Ketu contacts (fated, magnetic, sometimes turbulent)

AI Synastry Report

The most accessible feature: KarmaWheel's AI generates a multi-page interpretation of the two charts in plain language, drawing on classical compatibility logic. It examines:

• Each partner's individual chart strengths and challenges
• Ashtakoota score and key dosha findings
• Bi-Wheel patterns and HITS
• Active dashas in both partners and how they interact
• Practical predictions about the relationship

This is meant to read like a senior astrologer's hour-long compatibility consultation. It's available to Pro subscribers as part of the Synastry feature.

The 7th lord and the spouse

Beyond couples-analysis, Vedic astrology gives a great deal of attention to each individual's 7th house — what their destined partner will be like. Reading the 7th in both the Rasi and the Navamsa, plus Venus / Jupiter as natural significators of spouse, gives a portrait of the partner the chart attracts.

When two people meet, their respective 7th-house indications often "match" each other — a person with a Cancer 7th (soft, family-oriented partner) tends to attract precisely that kind of partner because that's the partner they unconsciously seek. Reading the 7th of both charts shows whether each person is getting what they're naturally configured to want.

Beyond marriage

The same techniques apply to:

• Business partnerships: focus on 10th and 11th house contacts; Mercury and Saturn synastry
• Parent-child relationships: examine the 4th house (mother-child) and 9th house (father-child) overlays
• Long friendships: 11th house contacts and Moon-Jupiter aspects between charts
• Working relationships: 10th and 6th house contacts, Mercury synastry

In KarmaWheel's Synastry feature, just pick any two saved charts to compare — the system applies the analysis regardless of relationship type.

Practical workflow in KarmaWheel

1. Open Features → Synastry
2. Pick the two charts to compare (saved or famous)
3. KarmaWheel computes Ashtakoota, Bi-Wheel, and HITS
4. Click Generate AI Synastry Report for the long-form interpretation
5. Use Email Synastry PDF to send the full analysis to a client or partner

A note on judgment

Vedic compatibility analysis is a tool, not a verdict. A low Ashtakoota score doesn't doom a relationship — many lasting marriages are between charts with poor scores, and many failed marriages were between charts with high scores. The chart shows the terrain of the relationship; how the people involved navigate it determines the outcome.

Use compatibility readings to understand the dynamic, anticipate stress points, and time decisions wisely — not to overrule what your heart already knows.

Related articles

• Navamsa (D9) — critical for marriage analysis
• The 27 Nakshatras — the basis for Ashtakoota
• The Twelve Houses (Bhavas) — house-overlay reading