Birth Time Rectification — Narrow It Down from Your Life
Give the window your birth time could fall in and a few dated events. We scan the window every four minutes, show how the lagna, navamsa and D10 change across it, and score every candidate lagna by whether the dasha lords at your events fit the right houses.
- Lagna windows across your range
- Event–dasha scoring
- Clear about its limits
In short
Last reviewed 23 August 2026 · Method: Lahiri ayanamsa, VSOP87/ELP positions · how we verify
What the calculator shows
The lagna windows inside your range (from which minute to which minute each sign was rising) with the navamsa lagnas each contains; a score for each window from your events; a table of the best candidate times with lagna, D9 lagna, D10 lagna and Moon nakshatra; and whether your Moon nakshatra is certain across the whole range (usually it is).
How the scoring works
For each event you enter, the calculator finds the mahadasha and antardasha running at that date (the dasha depends on the Moon, which barely changes across the window) and asks, for each candidate lagna: do those two lords rule or occupy the houses this event belongs to? A marriage in a Venus–Jupiter period scores for the lagnas that make Venus or Jupiter the 7th, 2nd or 11th lord; a new job in a Saturn period scores where Saturn rules the 10th, 6th, 2nd or 11th. Natural significators (Venus for marriage, Jupiter for children) also count. The lagna that makes the most events “fit” rises to the top.
What it does not do
It does not weigh the navamsa, transits at the event, the strength of the lords, or your appearance, which are the things a human rectifier adds. Use it to choose between lagnas; then take the best window to the AI astrologer or a practitioner with more of your history. For the sensitivity of a single lagna, the lagna calculator shows the rising window and your margin inside it.
How this calculator works
- Scan
- Every 4 minutes across the window (same day): full kundli, lagna, D9 and D10 lagna, Moon nakshatra/pada.
- Events
- Vimshottari maha + antar lords at each event date; +1 per lord that rules/occupies one of the event's houses or is its karaka; max 2 per event.
- Windows
- Consecutive candidates with the same lagna grouped; best score per window; D9 lagnas listed.
- Limits
- Single calendar day; no navamsa/transit weighting; heuristic, labelled as such.
The same engine casts the full janam kundli, so results here and there always agree. How we check the maths →
Events and the houses they are scored against
| Event | Houses | Natural significators |
|---|---|---|
| Marriage | 7, 2, 11 | Venus |
| Birth of a child | 5, 9, 2 | Jupiter |
| First job / new job | 10, 6, 2, 11 | Saturn, Sun |
| Promotion / recognition | 10, 11, 9 | Sun, Jupiter |
| Going abroad | 12, 9, 3 | Rahu |
| Buying a house / vehicle | 4, 11, 2 | Mars, Venus |
| Father's passing | 9, 2, 8 | Sun |
| Mother's passing | 4, 12, 8 | Moon |
| Serious illness / accident | 6, 8, 12 | Saturn, Mars |
| Separation / divorce | 7, 6, 12 | Saturn, Rahu |
Birth time rectification — questions people ask
How it works, how many events, and how far to trust it.
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See it in your full kundli
Every placement, your running dasha and the doshas that apply — free, no sign-up. Then ask the AI what it means for you.