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Free Birth Chart Calculator

Calculate a tropical birth chart with planetary degrees, an equal-house wheel and major aspects. Read the placements alongside the method, rather than relying on a picture alone.

Astronomical positions are calculated; astrology and numerology interpretations are symbolic, not scientifically validated assessments.

Birth details

Reference cities use centre coordinates. Edit them for your actual birthplace. Historical offsets follow your browser’s time-zone database; check your record when clocks changed.

Calculations stay in your browser. We do not put birth details in URLs, storage or analytics. Results are not sent to a server.

Enter your details and choose Calculate. Examples are illustrative, not saved profiles.

How this calculation works

Ten geocentric planetary positions are calculated from the ephemeris. With a known time and supported latitude, twelve equal houses begin at the Ascendant. Major aspect separations use a fixed six-degree orb.

Assumptions and limits

This is tropical astrology with equal houses, not sidereal astrology or Placidus. Changing the house system can change house placements without changing the planets' longitudes. Polar house calculations are not supported.

Questions about free birth chart

Why can another chart show different houses?

House systems divide the sky differently. This wheel uses twelve equal 30-degree houses starting at your rising degree; other sites may use Placidus or whole-sign houses.

Is a birth chart a scientific personality assessment?

No. Planetary coordinates are astronomical calculations; personality and life themes attached to them are symbolic traditions.

Useful next steps