Free Hellenistic Astrology Chart Calculator

A Hellenistic astrology chart is your natal chart read through the techniques developed in the Greek-speaking Mediterranean between roughly 200 BCE and 600 CE. It uses the seven visible planets, whole sign houses, the doctrine of sect, the five essential dignities, and a set of mathematical points called lots.

Most modern birth chart calculators won't show you sect. They won't rank your dignities. They won't compute your lots. This one does, and it links you into the dedicated tool for each technique when you want to go deeper.

The framework also picks up later Persian and Arabic additions like the almuten figuris and hyleg, which we flag as medieval where they appear since they were not Hellenistic in the strict sense. The terminology section below explains the distinction.

Hellenistic astrology has a reading order. Modern astrology mostly does not. The order matters because each step sets up the next.

1. Start with sect. Day chart or night chart? The benefic and malefic of sect, the sect light, and which planets support or trouble the chart all flow from this. Open the sect calculator for the full breakdown.
2. Find the ascendant ruler. The planet that rules your rising sign is the steersman. Open the chart ruler tool.
3. Look at the almuten figuris. This medieval technique gives you a single planet that wins the chart across all the dignity systems plus day and hour rulership. Open the almuten calculator.
4. Walk the dignities of each visible planet. Where does each of the seven planets fall on the rulership, exaltation, triplicity, bound, and decan grid? Open the dignity grid.
5. Read the Lot of Fortune and the Lot of Spirit. Fortune is the material thread. Spirit is the agentive thread. Explore all seven hermetic lots in the Arabic parts calculator.
6. Map house rulers. Each of the twelve houses has a ruler. Trace each ruler to the house it actually sits in. That tells you how each life topic connects to the others.
7. Layer in timing. Annual profections, firdaria, zodiacal releasing, and primary directions activate the chart over different time scales. See your profected year, run firdaria, or open Astro Replay to watch every classical timing layer activate at once across your life.

These terms get used interchangeably in marketing copy. They are not actually interchangeable. Here is the clean version.

Hellenistic names the early Greek-language layer of Western astrology, roughly 200 BCE through the 6th or 7th century CE. The major figures are Dorotheus of Sidon, Vettius Valens, Claudius Ptolemy, and Antiochus of Athens. The techniques that are unambiguously Hellenistic include sect, essential dignities, lots (also called arabic parts, a transmission artifact rather than a separate tradition), whole sign houses, profections, and zodiacal releasing.

Medieval names the Arabic, Persian, Latin, and later European transmission of Hellenistic astrology, roughly the 8th through the 16th century CE. This is where the techniques on this page that are flagged "medieval" come from. The almuten figuris was codified by Ibn Ezra in the 12th century. Hyleg and alcocoden enter the corpus through Persian astrologers like Masha'allah and Abu Ma'shar in the 8th and 9th centuries. Firdaria's planetary periods are also Persian.

Hermetic refers to the framing of these techniques through the Hermetic corpus, the body of texts attributed to Hermes Trismegistus. The seven hermetic lots (Fortune, Spirit, Eros, Necessity, Courage, Victory, Nemesis) are sometimes called hermetic because they were transmitted through that lineage. It is a framing, not a separate astrology.

Traditional is the broad modern label that covers everything pre-1700: Hellenistic plus medieval plus early Renaissance. When you see "traditional astrology" today, that is typically what is meant.

Classical is the umbrella we use here in the body copy because this hub combines techniques from more than one historical period. We say "Hellenistic" in the page title because that is the term Google searchers use, and we want the page to be findable by people looking for it.

If a chip in the result panel says "medieval" next to it, that is a hint that the technique entered the Western tradition later than the core Hellenistic material, even though it is now read alongside it.

Every claim in this calculator is computed from real astronomical data and read through named primary sources. We use the JPL DE-440 ephemeris kernel via the ANISE library, the same precision NASA uses for spacecraft navigation. Same birth data always produces the same chart.

Dorotheus of Sidon, Carmen Astrologicum (1st century CE). Source for the triplicity ruler triad (day lord, night lord, participating lord) and the foundational doctrine of lots.

Vettius Valens, Anthology (2nd century CE). The single largest surviving practical handbook from antiquity. Source for the Egyptian bounds we use, much of the Hellenistic interpretation we rely on, and the case material that grounds the techniques in real charts.

Claudius Ptolemy, Tetrabiblos (2nd century CE). The standard rulership scheme and the consolidation of the framework into a single text.

Abu Ma'shar al-Balkhi (9th century CE). Persian astrologer working in Baghdad who consolidated and extended the Hellenistic material for the Arabic-speaking world. Source material for the almuten figuris lineage.

Project Hindsight (1990s through 2000s). The translation effort led by Robert Schmidt with Robert Hand and Robert Zoller that brought the original Greek and Latin texts back into circulation in English. Most of the modern Hellenistic revival depends on this work. Chris Brennan's Hellenistic Astrology: The Study of Fate and Fortune (2017) is the standard modern reference that builds on it.

For a deeper academic treatment, the Internet Encyclopedia of Philosophy entry on Hellenistic Astrology is the cleanest scholarly summary online.