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Ascendant

Rising sign calculator

Enter birth date, exact birth time, and birthplace to calculate your Ascendant and house layout using ChartLumen's open astronomical engine.

First house anchor

The Rising sign starts the house layout and describes how the chart meets the world.

Time-sensitive

Small birth-time differences can change the Ascendant degree, especially near sign boundaries.

House context

Once the Ascendant is known, ChartLumen can place planets into approximate whole-sign houses.

Western or Vedic

You can switch between Western tropical and Vedic sidereal modes in the same form.

Astrology housesBig Three calculatorVedic calculator

Enter birth details

Birth time and place are required for rising sign and houses. Unknown time still works for Sun, Moon, and planets.

Time and place are used for the Ascendant and whole-sign houses.

No sign up required. Raw birth inputs are not persisted for session-only charts; a redacted, authorized server record of derived chart facts and this browser session keep the workspace functioning.