Cast your D27 (Saptavimsamsa), the twenty-seventh divisional chart of Vedic astrology, from date, time, and place of birth. The tool computes your D27 Lagna with a birth-time-confidence check, every planet’s segment, presiding deity, D27 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 BPHS positional start-sign rule.
100% private - the D27 calculation runs entirely in your browser. No birth data sent anywhere.
Supports 1900 onwards for better calculation reliability.
Birth time matters here: a D27 segment is 1 deg 6 min 40 sec, so your D27 Lagna changes roughly every 4.4 minutes.
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astrology| Chart / harmonic | D27 (Saptavimsamsa), the twenty-seventh divisional chart. Also called Nakshatramsa or Bhamsa |
|---|---|
| Division size | 27 equal segments of 1 deg 6 min 40 sec (30/27 deg) per sign - fourth-finest division we publish, after the D60, D45 and D40 |
| Start-sign rule | The four movable signs dealt out in zodiacal order by the natal sign's POSITION (sign 1 from Aries, 2 from Cancer, 3 from Libra, 4 from Capricorn, then repeating) - not by element |
| Presiding deities | Twenty-seven, in verse order for an odd sign and reversed for an even one (BPHS Ch. 6, 24-26) |
| Reachable signs | All twelve, across a whole chart |
| Classically read for | Strength and weakness (BPHS Ch. 7, 1-8 varga-use verse) - the verse's own pairing |
| D27 Lagna sensitivity | ~4.4 min of birth time per segment at Indian latitudes - fourth on this site, after the D60, D45 and D40 |
| Same-sign geometry | 28 of 324 cells, unevenly spread - three segments for four signs, two for the other eight. No one-in-27 rule |
| Nodes | Rahu/Ketu NEVER share a D27 sign, but ALWAYS share the D27 deity - both halves are forced by the rule |
| 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 Saptavimsamsa - also called the Nakshatramsa or Bhamsa, both attested names for the same chart - is the twenty-seventh harmonic, one of the sixteen divisional charts (Shodasavarga) described in the Brihat Parashara Hora Shastra. Where the birth chart (D1) maps the whole life, each varga re-reads the same positions at a finer resolution; at 1 deg 6 min 40 sec per segment the D27 sits fourth among the divisions we publish, behind the Shashtiamsa (D60), the Akshavedamsa (D45) and the Khavedamsa (D40).
Like every varga, the D27 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. Its starting sign is fixed by where the natal sign falls in a repeating four-sign cycle, which is what gives the D27 its two unusual node properties described below.
Brihat Parashara Hora Shastra Ch. 6, 24-26 gives the segment size and the deity list. The start sign is the part worth stating carefully, because two readings of the verse circulate and they disagree for half the zodiac.
| Natal sign | Counting starts from |
|---|---|
| Aries | Aries |
| Taurus | Cancer |
| Gemini | Libra |
| Cancer | Capricorn |
| Leo | Aries |
| Virgo | Cancer |
| Libra | Libra |
| Scorpio | Capricorn |
| Sagittarius | Aries |
| Capricorn | Cancer |
| Aquarius | Libra |
| Pisces | Capricorn |
The four movable signs are dealt out in zodiacal order by position, cycling every four signs. The competing reading sends each sign to the movable sign of its own element, and the two agree for every fiery and airy sign - which is exactly why the difference is easy to miss. They part company on the earthy and watery ones: the element reading would send Taurus to Capricorn and Cancer to Cancer, where the positional cycle sends Taurus to Cancer and Cancer to Capricorn.
The verse itself is ambiguous in both Sanskrit witnesses we consulted. What settles it is a commentary that enumerates the rule sign by sign - “in Mesha from Mesha; in Vrisha from Karkataka; in Mithuna from Tula; in Karka from Makara; in Simha again from Mesha” - and those two pairs are precisely the discriminating cases. This tool uses the positional cycle.
Applied in verse order for an odd sign and in reverse for an even one (Ch. 6, 26: “count these deities in a reverse order for an even Rasi”). These are traditional names only; the verse assigns them no interpretive meaning here, and neither does this tool.
A naming note, because printed tables differ here. We show Indragni at segment 16; both Sanskrit witnesses read Shakragni, and Shakra is Indra, so the two name one deity - the same policy this list already applies at vahni for Agni, arka for Surya and ambupa for Varuna. A widely circulated English edition prints “Chakragni” instead, which is a reading artefact: the compound marut + shakragni surfaces as marucchakragni, and a reader who does not undo that join lifts “chakragni” out of the middle of it. The same edition prints “Adhiti” for Aditi, “Varuna” at 20 where the Sanskrit reads udaka (the Waters), and “Pushya” at 27, which is a nakshatra name rather than Revati’s deity Pushan.
The ascendant crosses one saptavimsamsa in roughly 4.4 minutes of clock time at Indian latitudes - fourth fastest among the divisions on this site, after the D60 at ~2 minutes, the D45 at ~2.7 and the D40 at ~3, and a long way from the two hours the D1 Lagna spends in a sign. The exact interval varies with rising sign and latitude (oblique ascension), so instead of quoting only the average, this tool computes your chart’s distance to the nearest D27 Lagna boundary in minutes.
Separately, the tool flags any of the seven classical grahas sitting within about 0.01 deg of a segment edge. That band covers about 1.8% of the zodiac on a 30/27-deg segment - fourth among the charts we publish, behind the D60 (4.0%), D45 (3.0%) and D40 (2.67%). Rahu and Ketu are deliberately never flagged: the 0.01 deg figure is a measured margin for the seven grahas and does not cover the nodes, whose real uncertainty is which node model a calculator uses - a gap around two hundred times wider.
The varga-use verse (Ch. 7, 1-8) assigns the D27 strength and weakness - the verse’s own pairing, and both halves of it. Unlike the D45 and D60, which the same passage groups together under “all indications” with no distinct domain, the D27 does have one of its own.
Modern practice commonly extends this to stamina, resilience and physical constitution, and often ties the chart to the twenty-seven nakshatras through the Nakshatramsa name. Those readings are later practice, not the verse’s own wording, and we label them as such rather than presenting the two as one tradition. This tool computes the chart; it does not interpret it.
This version computes the D27 chart, houses (whole-sign from the D27 Lagna), the segment deities, and the birth-time-confidence checks. It does not interpret the chart, it does not grade anybody’s strength or weakness, and it ships no predictions and no remedies.
The Saptavimsamsa is the twenty-seventh divisional chart (varga) of Vedic astrology, also called the Nakshatramsa or Bhamsa. Each 30-deg sign is divided into twenty-seven segments of 1 deg 6 min 40 sec, and every planet is re-mapped to a new sign based on which segment it occupies. The Brihat Parashara Hora Shastra's varga-use verse assigns it strength and weakness. It is read alongside the birth chart (D1), not instead of it.
By Brihat Parashara Hora Shastra Ch. 6, 24-26: counting starts from one of the four movable signs, dealt out in zodiacal order by the natal sign's position - Aries starts from Aries, Taurus from Cancer, Gemini from Libra, Cancer from Capricorn, Leo from Aries again, and so on repeating every four signs - then advances one sign per segment. This tool applies the rule to each planet's exact sidereal longitude from the birth chart.
By position. The two readings are easy to confuse because they agree for every fiery and every airy sign, and they disagree only for the earthy and watery ones: an element reading would send Taurus to Capricorn and Cancer to Cancer, while the positional cycle sends Taurus to Cancer and Cancer to Capricorn. A Sanskrit commentary settles it by enumerating the rule sign by sign - 'in Mesha from Mesha; in Vrisha from Karkataka; in Mithuna from Tula; in Karka from Makara; in Simha again from Mesha' - and those two capitalised pairs are exactly the discriminating cases. This tool uses the positional cycle.
A D27 segment is 1 deg 6 min 40 sec, and the ascendant crosses one in roughly 4.4 minutes of clock time at Indian latitudes, against about two hours for a D1 Lagna sign. Even a birth time recorded to the nearest five minutes can move the D27 Lagna by a sign. This tool reports how many minutes your entered time sits from the nearest D27 Lagna boundary, and flags any of the seven classical grahas sitting within about 0.01 deg of a segment edge.
Because the start sign advances two places in the four-sign cycle over six signs, so the nodes begin from starting points six signs apart and never land together. This is the opposite of the D16, D20, D40 and D45, where the nodes always share a sign. The deities go the other way: the nodes always share the same D27 deity, because opposite signs share odd/even parity and the nodes take the same segment number, so the even-sign reversal lands them on the same one. Both halves are properties of the classical rule.
No, and it is not evenly distributed either. Because the count starts from a movable sign chosen by position rather than from the natal sign, only 28 of the 324 sign-and-segment combinations map back to the natal sign - three segments for four of the signs and two for the other eight. There is no tidy one-in-twenty-seven rule, and unlike the Shashtiamsa (D60), which divides evenly at one twelfth, the D27 has no clean fraction. The classical term vargottama refers to the D1/D9 correspondence, not the D27.
Yes. Saptavimsamsa, Nakshatramsa and Bhamsa are three attested names for the twenty-seventh divisional chart, and this tool treats them as one page rather than three. The name Nakshatramsa reflects the count matching the twenty-seven nakshatras, though the chart divides each sign into twenty-seven parts rather than mapping the nakshatras themselves onto the zodiac. Searches using any of the three names reach this calculator.
Brihat Parashara Hora Shastra Ch. 6, 24-26 lists twenty-seven presiding deities, applied in verse order for an odd sign and in reverse order for an even one, as the verse itself directs. This tool prints the deity for each planet's segment beside its D27 sign. One name is a disclosed fork rather than a settled reading: at segment 16 this tool prints Indragni, while both Sanskrit witnesses consulted read Shakragni there, and since Shakra is Indra the two name one deity. The verse assigns these deities no interpretive meanings, and this page does not invent any.
The mean lunar node, the same model as our Kundli. That choice carries weight at this division: calculators using the true node can differ by up to about 1.9 deg, which spans close to two whole D27 segments and can place a node in a different D27 sign. For the same reason the nodes are never flagged for boundary proximity on this page - the measured ephemeris margin covers the seven classical grahas and does not extend to a computed convention like the node.
Yes. The Saptavimsamsa is one of the Shodasavarga, the sixteen-chart scheme set out in the Brihat Parashara Hora Shastra. Like every varga it is a derived chart: it re-maps each planet's exact sidereal longitude from the birth chart and observes nothing new in the sky. It refines the D1 rather than replacing it, and it predicts nothing and prescribes nothing - the segment, deity, sign and house reported here are calculation, not counsel.
This page is the canonical surface for these terms: D27 chart, Saptavimsamsa, Nakshatramsa, and Bhamsa. They all refer to the twenty-seventh divisional chart described above.