D1 vs D9 vs D10 Chart: What Each Answers (They Agree 1 Time in 3)
I ran 20,000 births through Supastro's own strength check: the birth chart, Navamsa and Dasamsa give a planet the same verdict only 32.9% of the time, a planet strong in the D1 stays strong in both others just 7.5% of the time, and Mercury can never be strong in all three.
The D1 is your birth chart: the whole life and what it promises. The D9 (Navamsa) cuts every sign into nine and shows the marriage and how much strength each planet really carries. The D10 (Dasamsa) cuts every sign into ten and shows career and status. Three views of one sky, and they disagree far more than people assume.
What is the difference between the D1, D9 and D10 charts?
They are the same planets cut at three resolutions. The D1 places each planet in one of twelve 30-degree signs. The D9 cuts every sign into nine slices of 3°20' and the D10 into ten slices of 3°, then rebuilds a chart from the slices. Parashara gives each a job: the body from the D1, the spouse from the D9, power and position from the D10.
The slices follow fixed rules. In the D9 a movable sign counts its slices from itself, a fixed sign from its 9th, a dual sign from its 5th; in the D10 odd signs count from themselves and even signs from their 9th. The Moon changes its D9 slice about every six hours, Saturn about every three months (the 16 divisional charts).
Which chart should you read for which question?
Open the chart that owns the question, but only after the D1 has said what is promised. Find your question below. The third column is what Parashara reads from that chart; the last is what Supastro's engine checks there.
| Your question | Read this chart | What Parashara reads there | What Supastro checks |
|---|---|---|---|
| What does my life promise? Body, health, character | D1 (Rasi), the birth chart | The body, and every house | Every reading starts here |
| Will my marriage hold? What is my spouse like? | D9 (Navamsa) | The spouse | Darakaraka and 7th lord, from D1 into D9 |
| How strong is this planet really? | D9 (Navamsa) | 3 of 20 points in his 16-chart strength score, behind only the D60 and D1 | Its chart engine files the D9 under marriage, dharma and real strength |
| Which career, and how high? | D10 (Dasamsa) | Power and position | 10th lord and career planet, from D1 into D10 |
| Money and savings | D2 (Hora) | Wealth | 2nd and 11th lords, from D1 into D2 |
| Home and property | D4 (Chaturthamsa) | Fortunes, in our edition | 4th lord and Mars, from D1 into D4 |
| Children | D7 (Saptamsa) | Sons and grandsons | 5th lord and the children planet, from D1 into D7 |
| Parents | D12 (Dwadasamsa) | Parents | Read with the 4th (mother) and 9th (father) houses |
How often do the D1, D9 and D10 agree on a planet?
One time in three. With the strength test Supastro's Oracle applies (strong means exalted or in its own sign; weak means debilitated, or combust in the birth chart), the three charts gave a planet the same verdict in 32.9% of 140,000 planet readings. Nearly all of that was "neutral everywhere" (31.1%). Strong in all three: 1.4%.
Supastro, an AI Vedic astrology app built in Bengaluru by Quantum Karma, computes every divisional chart before any AI writes a word. Method: 20,000 random births, 1975 to 2005, ten Indian cities, seven planets each, Supastro's own engine and its D1-to-varga check.
- Strong in the D1 rarely survives both checks: 7.5% of planets strong in the birth chart were strong in the D9 and the D10 too. One in 13.
- The D1 alone matches the D9 verdict half the time (49.1%), and the D10 verdict the same (49.0%).
- Mercury is never strong in all three. Not once in 20,000. It is structure, not chance: the slices of Gemini and Virgo that land in Mercury's own signs in the D9 never overlap those that do in the D10. Saturn has the widest window, 3.9% of the zodiac.
- Weak in the D1 but strong in both vargas: 5.2% of weak birth-chart planets. These are the late bloomers.
- Per chart: on average 2.3 of your seven planets get one verdict across all three charts. Only 4 charts in 20,000 had all seven agree.
The Sun agrees most, partly because it can never be combust. Combustion, closeness to the Sun, counts only in the D1, so it pulls the D1 verdict of Mercury (combust in 40.6% of charts), Mars and Venus away from their vargas.
What is vargottama, and how common is it?
A planet is vargottama when it sits in the same sign in the D1 and the D9. The Brihat Jataka calls those degrees highly auspicious: the first slice of a movable sign, the middle of a fixed one, the last of a dual one. Parashara says a vargottama Lagna lord gives immunity to disease. It is not rare: 11.3% of planets, about one in nine.
Supastro treats it as a lock-in, not a blessing. A vargottama planet in its own or exaltation sign is strongly confirmed; a debilitated one stays weak, confirmed twice. Same sign in the D1 and D10: 10.1%. Both at once: 2.5%. A vargottama rising sign: 10.9% (how the D9 reads).
How do you read the D1, D9 and D10 together, step by step?
Promise, confirmation, topic, verdict, timing, birth time. In that order.
- Read the question's house and its lord in the D1: sign, house, dignity, combustion.
- Find that planet in the D9. Exalted or own sign confirms; debilitated weakens; vargottama locks either in.
- Open the topic chart: the D10 for career, the D2 for wealth, the D4 for property, the D7 for children.
- Name the verdict the way Supastro's engine does: strong in both (delivers), strong in the D1 only (promised, slow to land), weak in the D1 but strong in the varga (late bloom), weak in both (a tested area).
- Time it with the dasha. The planet's own period switches a confirmed promise on (good and bad periods).
- Check the birth time. The D9 and D10 rising signs change every 10 to 15 minutes.
One chart, three verdicts: what does that look like?
Hypothetical: 27 July 1993, 5:58 pm, Kolkata. Capricorn rising. Read only the D1 and you would crown two planets: Mercury in its own sign, Gemini, and Saturn, the Lagna lord, in its own sign, Aquarius. Mars, in Leo in the 8th house, looks ordinary.
The D9 and D10 disagree on all three. Mercury lands in Taurus and Aquarius: neutral in both. Saturn lands in Scorpio and Pisces: neutral in both. Mars lands in Scorpio in the D9 and Aries in the D10, its own signs in both. The birth chart's favourites have their strength only in the birth chart; the ordinary planet in the 8th is the one both vargas back, where marriage and career are read (career from the D10).
Now move the birth ten minutes later. No planet changes its D9 or D10 sign, but the D9 rising sign moves from Aquarius to Pisces and the D10 rising sign from Libra to Scorpio, so every house in both charts shifts. Thirty minutes later the D10 rises in Capricorn.
What else has to be computed before this becomes a prediction?
| Layer | What I compute | How it can change the answer |
|---|---|---|
| D1 placement | Sign, house, dignity, combustion, retrograde motion | Sets the promise |
| D9 placement | Sign, dignity and vargottama | Agrees with the D1's strength verdict only 49.1% of the time |
| Topic chart | D10 career, D2 wealth, D4 property, D7 children, D12 parents | Confirms, downgrades or rescues the promise for that topic |
| Shadbala | The six-part strength score in rupas | Separates a neutral planet that works from one that does not |
| Karakas | Darakaraka for marriage, Amatyakaraka for career | Adds a second planet that must agree |
| Dasha | Whose period runs, and when | Decides when a confirmed promise delivers |
| Birth time | The rising degree to the minute | D9 and D10 rising signs move every 10 to 15 minutes |
Frequently asked questions
What is a D1 chart?
Your birth chart, the Rasi chart: the twelve signs and houses with the planets as they stood at birth, read from your rising sign. Parashara reads the body from it, and every house begins here. The vargas only confirm or qualify what the D1 promises.
Is the D9 more important than the D1?
No. The D1 sets the promise and the D9 tests it; in Parashara's 16-chart strength score the D1 carries 3.5 of 20 points and the D9 3. A strong D9 can rescue a weak D1 planet, which Supastro calls a hidden strength, but the reading still starts from the D1.
What does the D10 chart show?
Career, status and public standing: Parashara reads power and position from it. Supastro reads your 10th lord and career planet from the D1 into the D10; in a 20,000-birth test a strong-looking 10th lord was confirmed there only 1 time in 4.
Can a weak planet in the D1 be strong in the D9?
Yes, and it matters. In our sample 5.2% of planets weak in the birth chart were strong in both the D9 and the D10. Supastro calls that a hidden strength: results that arrive later in life.
Is there a free D1, D9 and D10 chart calculator?
Yes. Supastro's free kundli draws your D1, D9 and D10 as North Indian charts with your planet table, dashas and Ashtakavarga, with no account. The Career & Money Reading runs the D1-to-D10 check for your career planets.
Why do my D9 and D10 change with the birth time?
Because the rising degree moves about one degree every four minutes and a D9 or D10 slice is only 3 to 3⅓ degrees wide, so their rising signs change every 10 to 15 minutes. Use a hospital or birth record, and see the rising-sign windows if you are unsure.
