Cast your Trimsamsa (D30), the thirtieth divisional chart of Vedic astrology, from date, time, and place of birth. The tool computes your D30 Lagna with a birth-time-confidence check, every planet’s segment, lord, deity, D30 sign and house, and renders the chart in North or South Indian style. Uses the sidereal Lahiri ayanamsa, the same engine as our Kundli, and the Parasara trimsamsa scheme.
100% private - the D30 calculation runs entirely in your browser. No birth data sent anywhere.
Supports 1900 onwards for better calculation reliability.
Birth time matters here: the D30 segments are unequal (5 to 8 degrees), so your D30 Lagna changes roughly every 24 minutes on average - much faster than the ~2-hour D1 Lagna.
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astrology| Chart / harmonic | D30 (Trimsamsa), the thirtieth divisional chart |
|---|---|
| Division size | UNEQUAL: 5, 5, 8, 7, 5 deg (odd signs); reversed in even signs |
| Start-sign rule | The segment lord's own sign - odd-numbered in odd signs, even-numbered in even |
| Segment lords | Mars, Saturn, Jupiter, Mercury, Venus (BPHS Ch. 6, 27-28) |
| Presiding deities | Agni, Vayu, Indra, Kubera, Varuna (reversed in even signs) |
| Signs never used | Cancer and Leo - the luminaries rule no trimsamsa |
| Classically read for | Evil effects (BPHS Ch. 7 varga-use verse) |
| D30 Lagna sensitivity | ~24 min of birth time per segment, varies by segment and rising sign |
| Same-sign geometry | 60 of 360 deg self-map: one sixth, spread unevenly |
| Scheme | Parasara trimsamsa (Parivritti and Shashtyamsa-like not implemented) |
| Inputs | Date, time, and place of birth |
| Engine | Meeus VSOP87 + Lahiri ayanamsa; Rahu/Ketu = mean node (same engine as Kundli) |
| Privacy | 100% client-side; no birth data leaves your browser |
The Trimsamsa - also spelled Trimshamsa - is the thirtieth of the sixteen divisional charts (Shodasavarga) described in the Brihat Parashara Hora Shastra. Where the birth chart (D1) maps the whole life, each varga zooms into one domain, and the classical varga-use verse assigns the Trimsamsa to evil effects: the areas where difficulty is read.
Like every varga, the D30 is a derived chart: it takes each planet’s exact sidereal longitude from the birth chart and re-maps it. Nothing new is observed in the sky. What makes the D30 unusual is that its divisions are not equal - a point worth understanding before reading the chart, because it changes how sensitive a placement is to birth time depending on where in the sign a planet sits.
Each sign is divided into five segments ruled by the five non-luminous planets. In an odd sign (Aries, Gemini, Leo, Libra, Sagittarius, Aquarius) the order runs Mars, Saturn, Jupiter, Mercury, Venus with spans of 5, 5, 8, 7 and 5 deg. In an even sign the verse says the quantity, the lordship and the deity all reverse - so the spans become 5, 7, 8, 5, 5 and the order runs Venus, Mercury, Jupiter, Saturn, Mars. That is a genuine reversal of the sizes too, not just of the names.
| Odd sign: degrees | Lord | Maps to | Deity | Even sign: degrees | Lord | Maps to | Deity |
|---|---|---|---|---|---|---|---|
| 0 - 5 deg | Mars | Aries | Agni | 0 - 5 deg | Venus | Taurus | Varuna |
| 5 - 10 deg | Saturn | Aquarius | Vayu | 5 - 12 deg | Mercury | Virgo | Kubera |
| 10 - 18 deg | Jupiter | Sagittarius | Indra | 12 - 20 deg | Jupiter | Pisces | Indra |
| 18 - 25 deg | Mercury | Gemini | Kubera | 20 - 25 deg | Saturn | Capricorn | Vayu |
| 25 - 30 deg | Venus | Libra | Varuna | 25 - 30 deg | Mars | Scorpio | Agni |
Methods note, stated because it is a real limit of the source rather than a detail: the BPHS verse gives each trimsamsa a lord and a deity, not a rasi. A drawn D30 chart needs a sign per planet, so the “maps to” columns above come from the tradition of practice - specifically the table published by Sanjay Rath, which is also what JHora’s default Parasara D-30 renders. We follow it and name it rather than presenting it as the only reading. Each varga in the family carries its own rule: the Navamsa keys on movable/fixed/dual, the Dasamsa forks on odd/even from the 9th, the Drekkana uses a uniform trine, and the Dwadasamsa simply counts forward from the sign itself.
Look at the lords in the table above: Mars, Saturn, Jupiter, Mercury and Venus. The Sun and the Moon are absent, because the classical text gives them no trimsamsa at all. Their signs - Cancer and Leo - therefore cannot be produced by the mapping, and every D30 chart ever drawn uses only ten of the twelve signs. If you come to the D30 from the Navamsa or another equal-division varga, two permanently empty boxes look like a fault in the calculator. They are not; they are what the scheme produces.
The Brihat Parashara Hora Shastra’s varga-use verse assigns the Trimsamsa to evil effects. Practitioners look at the D30 Lagna and its lord and at which planets fall in which segments, reading that together with the D1’s own houses - the varga refines the birth chart rather than overriding it, the same relationship the Navamsa (D9) has with marriage significations and the Dwadasamsa (D12) has with parents.
All of this is descriptive tradition, not prediction. This page does not tell you what will happen to you, does not identify misfortunes in your chart, and offers no remedies, gemstones, or rituals - the classical text pins the domain and nothing here goes beyond naming it.
The ascendant crosses one trimsamsa in roughly 24 minutes of clock time on average - but that average hides more variation than in other vargas, because the segments themselves differ by a factor of 1.6 before oblique ascension is considered at all. A 5-deg Mars segment passes far quicker than an 8-deg Jupiter one. Instead of quoting only the average, this tool computes your chart’s distance to the nearest D30 Lagna boundary in minutes and says so plainly.
Planet placements have their own fragility near a segment edge. This tool flags any planet within about 0.3 deg of one. That 0.3 deg figure is a conservative division-edge proximity heuristic we carry across our varga tools, not a certified accuracy bound and not a birth-time claim - it simply marks placements close enough to an edge that a different ephemeris, or a birth-time error, could move them across. Because the segment signs are never neighbours, a body that does cross lands somewhere quite different, so where a flag fires the tool shows you both alternatives by name rather than asking you to work them out.
This version computes the Parasara D30 chart, houses (whole-sign from the D30 Lagna), the segment lords and BPHS deities, and the birth-time-confidence checks. It does not compute the alternate trimsamsa schemes (Parivritti/cyclical, or Shashtyamsa-like), it does not interpret the chart, and it ships no predictions and no remedies.
The Trimsamsa is the thirtieth divisional chart (varga) of Vedic astrology. Unlike most vargas it does not divide a sign into equal parts: each 30-deg sign is split into five unequal planet-ruled segments, and every planet is re-mapped to a new sign based on which segment it occupies. The classical varga-use verse in the Brihat Parashara Hora Shastra assigns this chart to evil effects. It is read alongside the birth chart (D1), not instead of it.
In an odd sign the segments are Mars 0-5 deg, Saturn 5-10, Jupiter 10-18, Mercury 18-25 and Venus 25-30. In an even sign both the quantities and the lordships reverse, so they become Venus 0-5, Mercury 5-12, Jupiter 12-20, Saturn 20-25 and Mars 25-30. The resulting sign is the ruling planet's own rulership, taking its odd-numbered sign in odd signs and its even-numbered sign in even signs. This tool implements the Parasara scheme.
Because the Sun and the Moon rule no trimsamsa. The Brihat Parashara Hora Shastra gives trimsamsa lordship only to Mars, Saturn, Jupiter, Mercury and Venus, so the two signs the luminaries own - Cancer and Leo - can never be reached by the mapping. Every D30 chart uses only ten of the twelve signs. This is a property of the classical scheme and not a missing result or a bug.
The Parasara trimsamsa - the unequal planet-ruled segments described above, which is the default scheme in mainstream software. Other schemes exist: JHora, for instance, also offers a Parivritti (cyclical) trimsamsa and a Shashtyamsa-like trimsamsa, and they place planets differently. They are named here for completeness but are not implemented in this version.
No, and we think that is worth stating plainly. Brihat Parashara Hora Shastra Ch. 6, 27-28 gives each trimsamsa a ruling planet and a presiding deity, and says the even signs reverse the odd order - but it does not name a rasi for each segment. A D30 chart needs one sign per planet, so the sign mapping comes from the tradition of practice rather than from that verse. This tool follows the mapping published by Sanjay Rath, which is also what JHora's default Parasara D-30 renders, and we name it rather than presenting it as the only possibility.
The Brihat Parashara Hora Shastra names them as Agni, Vayu, Indra, Kubera and Varuna, in that order for an odd sign and reversed for an even sign, matching the reversed lordships. This tool shows the deity for each planet's segment; it does not attach any predictive meaning to them, because the classical text assigns the names without interpretation.
The ascendant crosses one trimsamsa segment in roughly 24 minutes of clock time on average, but the segments are 5, 7 or 8 deg wide, so the real interval varies with the segment as well as with rising sign and latitude. A sizeable error in birth time can shift the whole D30 house framework. This tool reports how many minutes your entered time sits from the nearest D30 Lagna boundary, and flags any planet sitting within about 0.3 deg of a segment edge.
Both - use the North Indian (diamond) / South Indian (square) toggle above the chart; both draw the same D30 (Trimsamsa) placements. In the North Indian format the houses are fixed with the Lagna at the top and the signs rotate; in the South Indian format the signs are fixed in the grid and the ascendant is marked in its box. Pick whichever regional format is more familiar.
No. It computes the classical D30 chart and reports what traditional sources say the chart is consulted for - the varga-use verse assigns it to evil effects. It makes no predictions about your life, your health, or any misfortune, it does not tell you what will happen to you, and it offers no remedies, gemstones, or rituals.
This page is the canonical surface for these terms: Trimsamsa, Trimshamsa, Trimsamsha, Trimshamsha, Trimsha, and D30 chart. They all refer to the thirtieth divisional chart described above.