Birth Chart Calculator: Your Planets, Rising Sign and Houses

Enter your birth date, local time and birthplace to see the Sun, Moon, rising sign, planets, whole-sign houses and major aspects. Select a planet on the wheel or in the placement list to explore its entry.

Use the clock time recorded at the birthplace.

Choose a city, or enter coordinates and an IANA time zone below.

Location coordinates and time zone

East longitudes and north latitudes are positive. City coordinates represent the city centre. You can adjust them for the recorded birthplace.

Calculations run in your browser. Birth details are not added to the page address or saved by this tool.

Calculation method, sources and privacy

This tool uses Astronomy Engine 2.1.19 for approximate geocentric, tropical positions in the true ecliptic of the calculation date. The Ascendant is calculated from the eastern horizon. Houses use whole signs. Retrograde status is estimated from the change in longitude around the selected instant.

Recorded local times are converted using your browser’s IANA time-zone database, including its historical daylight-saving rules. Repeated clock times require you to select an occurrence. A clock time skipped by a time change must be corrected. Historical records and results near sign boundaries may need additional verification.

For an unknown time, the tool checks planetary signs across the local date at half-hour intervals and its endpoints. Ascendant, houses and exact aspects are left out of that view. The entered date uses the Gregorian calendar and is supported from 1900 onward. Approximate birth times keep their uncertainty attached to the result.

Planetary calculations describe positions. Astrological interpretations are symbolic. For help reading the output, use the birth-chart guide, house guide and Sun, Moon and rising comparison.

The tool calculates locally and offers an optional CSV download. It does not store a chart on Cosmosnote. Site-wide analytics and cookie choices are described in the privacy policy.

Calculation library by Don Cross, Astronomy Engine, MIT license. City data from GeoNames, CC BY 4.0, downloaded 12 November 2026. The searchable dataset covers cities with at least 15,000 residents or designated capitals. Use manual coordinates for other places.

Enable JavaScript to calculate a chart. You can also follow the beginner reading path.