Your birth chart

Your birth chart

A map of the sky at the moment you were born, calculated from the date, time and place you enter.

Enter a birth date, time and place to calculate a chart with the deterministic calculation service. Positions, angles and houses are computed by tested software, never generated by a language model, and never estimated.

What this calculates

What is calculated, and the conventions used
  • Ten bodies (Sun through Pluto) in the tropical zodiac, in the true ecliptic and equinox of date, computed geocentrically.
  • Ascendant and Midheaven, and house cusps with body placements, when a birth time is known.
  • Houses are calculated in the Whole Sign system, Astro Gazer's default. House systems are competing astrological methodologies, not scientifically proven alternatives, and every calculated chart names the system it was produced with.
  • House-based interpretation is published for Whole Sign houses only, and interpretation written for one house system is never reused under another.
  • If the houses cannot be defined for a birthplace and moment, the calculation says so. No approximate cusps are produced.
  • If the birth time is unknown, nothing that depends on an instant is produced. No time is substituted in its place, and no approximate angle is offered.
  • Every value shown is produced by the deterministic calculation service and reported with its provenance. Nothing is generated by a language model.
  • This simple chart does not show aspects between planets, because no aspect interpretation is published yet.

How your birth details are handled

We use the birth details you enter only to calculate the chart you request. Guest birth details are not saved, and are never used for advertising or analytics. Please enter only your own birth details. See Privacy for more information

The full processing notice, and how your birth details are handled
  • Birth details are sent in the body of a same-origin POST request to this site.
  • They are not placed in the page address, a query string, or a shareable link.
  • No account is created and no chart is saved.
  • The application does not intentionally write birth details to localStorage, sessionStorage, IndexedDB, cookies, analytics, telemetry, or application logging.
  • What you type and what is returned stay in ordinary page memory for as long as your browser keeps the page.
  • Responses carry Cache-Control: no-store, which instructs browsers and intermediaries not to store them.
  • The guest Birth Chart is the only current feature designed to accept birth details.
  • If the calculation service is not configured, the request fails closed and the page says so instead of showing invented values.

Birth details

Use the local time at the birthplace. If you don't know it, leave it blank: Astro Gazer won't guess a time, so the result will be limited.

Type a town or city, then choose it from the list.

No chart has been calculated yet.