This free, independent calculator uses a recorded birth time and birthplace to set twelve natal house cusps. Choose one moving planet and a 30 or 90 day UTC range. Your details stay in this browser; this page does not create an account or save a chart.
What the table records
Each row is the minute-rounded crossing of a fixed natal cusp by the selected planet's apparent geocentric tropical longitude. Direct motion enters the house beginning at that cusp; retrograde motion returns to the preceding house. Repeated rows can be a genuine direct–retrograde–direct sequence. The opening house is shown even when no crossing occurs in the selected range.
For a long-lived transit, a 30 day window may have no crossing. Extend to 90 days or choose another planet. For measured contacts to natal planets, use the personal transit calendar; that is a different timing question.
Sources and calculation
- Christian Astrology (1647), Wellcome Collection — a public-domain primary witness for established Western house topics; these modern transit readings are original editorial work.
- Astro-Seek: Transit Planets in Natal Houses — an example of the established calculator category; our calculation and wording are independent.
- Astronomy Engine 2.1.19 — planetary positions used by our browser calculator.