You've been handed your jathakam. There's a square divided into 12 boxes, two-letter codes scattered through it, asterisks next to a few of them, and a lot of Sanskrit you weren't taught in school. Where do you even start?
Here's how to read it.
First — what kind of chart is this?
Vedic astrology has two visual conventions:
- South Indian chart: a fixed 4×4 grid where each rashi (zodiac sign) is always in the same square. Your birth circumstances change which square gets marked as the lagna, but the rashis themselves don't move. This is what AIJathakam uses, and what you'll see most commonly in Kerala, Tamil Nadu, Karnataka, and Andhra.
- North Indian chart: a diamond shape where the lagna is always at the top, but the rashis rotate. Same information, different visual.
Most of this guide assumes the South Indian style.
The fixed rashi positions
Memorise this once and the chart starts making sense:
```
+---------+---------+---------+---------+
| Meena | Mesha | Vrishabha | Mithuna |
|---|---|---|---|
| (12) | (1) | (2) | (3) |
+---------+---------+---------+---------+
| Kumbha | Karka | |
|---|---|---|
| (11) | (4) |
+---------+ centre area +---------+
| Makara | (chart info) | Simha |
|---|---|---|
| (10) | (5) |
+---------+---------+---------+---------+
| Dhanu | Vrischika | Tula | Kanya |
|---|---|---|---|
| (9) | (8) | (7) | (6) |
+---------+---------+---------+---------+
```
Top-left is Meena (Pisces). Going clockwise around the outer ring: Mesha → Vrishabha → Mithuna → Karka → Simha → Kanya → Tula → Vrischika → Dhanu → Makara → Kumbha → back to Meena.
The numbers in parentheses are the rashi numbers, not the house numbers. Don't conflate them — that's the next step.
Find your lagna (ascendant)
The lagna is the rashi that was rising on the eastern horizon at the moment of your birth. It's the most personal part of your chart — different birth times only minutes apart can change it.
In a printed jathakam, the lagna is usually highlighted with a coloured background (gold tint in the AIJathakam version), or a small "asc" or "lagna" label. Find that square first. Whatever rashi it is, that's your lagna.
For example, if the gold-tinted square is Mithuna, Mithuna lagna means you're a Gemini ascendant in Vedic terms. (Different from your Western sun sign — much more on this in any longer guide.)
Now — count houses from the lagna
The lagna square is House 1. From there, count clockwise around the outer ring. The square next-clockwise from the lagna is House 2. Then House 3. And so on, all the way to House 12, which lands on the square just before your lagna.
This is the single most important mechanical step in reading any Vedic chart. The houses are not the same thing as the rashis — they shift based on where your lagna is.
> If your lagna is in Mithuna, then Mithuna = House 1, Karka = House 2, Simha = House 3, Kanya = House 4… and so on, ending with Vrishabha = House 12.
What each house means
Memorise these meanings — they unlock most of the chart:
| House | Sanskrit name | What it covers |
|---|---|---|
| 1st | Tanu Bhava | Self, body, personality, life direction |
| 2nd | Dhana Bhava | Wealth, family of origin, speech, food |
| 3rd | Sahaja Bhava | Younger siblings, courage, communication, short journeys |
| 4th | Sukha Bhava | Mother, home, emotional foundation, vehicles, education |
| 5th | Putra Bhava | Children, intelligence, creativity, romance, past-life merit |
| 6th | Ari Bhava | Enemies, illness, debt, daily work, service |
| 7th | Kalatra Bhava | Spouse, marriage, business partnerships |
| 8th | Ayur Bhava | Longevity, transformation, occult, inheritance, sudden change |
| 9th | Dharma Bhava | Father, fortune, higher learning, religion, foreign travel |
| 10th | Karma Bhava | Career, public reputation, action in the world |
| 11th | Labha Bhava | Gains, income, friends, elder siblings, fulfillment of desires |
| 12th | Vyaya Bhava | Expenditure, foreign lands, hidden enemies, spiritual liberation |
Once you can read the houses, you're already ahead of most people who own a printed jathakam.
Decode the planet abbreviations
Each square contains zero, one, or several two-letter codes. These are the planets that occupy that rashi at your birth:
| Code | Planet | Sanskrit |
|---|---|---|
| Su | Sun | Surya |
| Mo | Moon | Chandra |
| Ma | Mars | Mangala |
| Me | Mercury | Budha |
| Ju | Jupiter | Guru |
| Ve | Venus | Shukra |
| Sa | Saturn | Shani |
| Ra | Rahu (north node) | Rahu |
| Ke | Ketu (south node) | Ketu |
Note that Vedic astrology uses 9 planets (navagraha), not the 10 of modern Western astrology. Uranus, Neptune, Pluto are not used. Rahu and Ketu are mathematical points (the lunar nodes) rather than physical bodies.
The asterisk and what it means
If you see something like Ju\* in a square, the asterisk means that planet is debilitated (neecha) in that rashi. Each planet has a sign of debilitation — the worst placement classically:
- Sun debilitated in Tula
- Moon debilitated in Vrischika
- Mars debilitated in Karka
- Mercury debilitated in Meena
- Jupiter debilitated in Makara
- Venus debilitated in Kanya
- Saturn debilitated in Mesha
Debilitated planets are weakened — but classical texts also describe a beautiful concept called neecha bhanga (cancellation of debilitation), where specific conditions reverse the weakness and turn it into unexpected strength. A complete [AI jathakam](https://www.aijathakam.com/jathakam) examines whether neecha bhanga applies to any debilitated planet in your chart.
Now you can start reading
With the chart decoded, you can begin asking real questions of it:
- Where is my 10th lord placed? Find the lord of whichever rashi sits in the 10th house from your lagna. Locate where that lord is sitting in the chart. The 10th lord's house tells you a lot about what shapes your career.
- What aspects my 7th house? In Vedic astrology, all planets aspect the 7th house from themselves, plus Mars (4th, 8th), Jupiter (5th, 9th), and Saturn (3rd, 10th) have additional aspects. Whatever planets aspect your 7th house influence your marriage and partnerships.
- Where is my Janma Rashi (moon sign)? The square containing Mo is your moon sign. Anuradha, Jyeshtha, etc. are nakshatras within that rashi.
What you still can't see from the chart alone
The South Indian chart shows planet placements but not:
- Degrees within each rashi — important for nakshatra and aspect strength
- Dasha periods — the timing system that says when each life theme activates
- Yogas — combinations like Raja yoga, Gajakesari yoga, Neecha Bhanga
- Doshas — Mangal dosha, Sade Sati, Kala Sarpa etc.
Those need either a full reading or a complete written report. The chart is the map; a full jathakam is the legend, the timeline, and the directions.
A worked-out example
Suppose your chart looks like this:
- Lagna: Dhanu (Sagittarius)
- Sun + Mercury: Meena (4th house from Dhanu)
- Moon + Saturn + Ketu: Vrischika (12th house)
- Jupiter (debilitated): Makara (2nd house)
- Mars: Mithuna (7th house)
- Venus: Mesha (5th house)
- Rahu: Vrishabha (6th house)
A first read might say:
- Dhanu lagna = Jupiter-ruled, philosophical, expansive personality
- Lagna lord Jupiter is debilitated in 2nd, so wealth and speech may have early difficulty — but check for neecha bhanga before concluding
- 12th house cluster (Moon, Saturn, Ketu) = strong foreign / spiritual / hospital orientation; introspective inner life
- Exalted Rahu in 6th = significant capacity to overcome opposition and succeed in service careers
- Mars in 7th = active marital partner, possible Chevvai dosha to verify
Already, with just the chart and 10 minutes of work, you can sketch a meaningful read. A full report goes much further — examining yogas, dasha timing, doshas, gemstones, life domain analyses — but the foundation is what we just walked through.
Where to go from here
If you want a chart but don't have one yet — the [AI jathakam](https://www.aijathakam.com/jathakam) generates a complete 20-section report with everything we just covered, plus dasha periods, yogas, doshas, and gemstone recommendations, in 1-3 minutes.
If you want to check compatibility with a partner once you understand individual charts, [check porutham online](https://www.aijathakam.com/porutham) gives you the ten-porutham analysis with both birth charts side by side.
If you want to read more — the classical foundation texts are Brihat Parashara Hora Shastra (the foundation of all later Vedic astrology), Phaladeepika by Mantreswara, and Saravali by Kalyana Varma. They're dense, but every modern jyotisha framework is built on them.
The chart isn't mystical. It's a map. Once you can read it, the rest of jyotisha becomes navigable.