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Part of Fortune calculator

Your Lot of Fortune and Lot of Spirit with sign, degree, whole-sign house and ruler — and the other five Hermetic lots — calculated the traditional way, reversed in a night chart.

Your birth data

Day, month, year — e.g. 07/03/1987.

The lots, the houses and the sect need the exact birth time: the rising sign changes about every two hours.

Start typing and choose the place from the suggestions.

Your birth data stays only in this browser session (up to two hours) and is not saved in any database. No account, no AI.

What the lots are

A lot (Greek kleros, later called an Arabic part) is a point of the chart found by measuring the distance between two planets and counting it from the Ascendant. The Lot of Fortune, also called the Part of Fortune or Pars Fortunae, is the best known of them.

Hellenistic astrologers used seven lots handed down under the name of Hermes: Fortune, Spirit, Eros, Necessity, Courage, Victory and Nemesis. Each formula is reversed when the person was born at night, because then the Moon, not the Sun, leads the chart.

AstroSensus calculates them from the same tropical positions as its Western chart and reads them with whole-sign houses, the house system of the Hellenistic tradition.

What you get

  • Fortune and Spirit

    Sign, degree, whole-sign house and ruler of both main lots.

  • Day or night chart

    The sect of your chart and why it reverses the formulas.

  • The seven Hermetic lots

    Eros, Necessity, Courage, Victory and Nemesis next to Fortune and Spirit.

Prefer the modern Western chart? Free birth chart

Questions about the Part of Fortune

How is the Part of Fortune calculated?

In a day chart it is the Ascendant plus the distance from the Sun to the Moon; in a night chart the distance from the Moon to the Sun. The Lot of Spirit is the same arc the other way round.

Why does the calculator need my birth time?

Every lot starts from the Ascendant, which moves through a whole sign in about two hours, and the sect (day or night chart) depends on whether the Sun was above the horizon.

Why is my Part of Fortune different on another site?

Some programs never reverse the formula at night, as Ptolemy did not. AstroSensus follows Valens and most modern traditional astrologers and reverses it in a night chart; the result names the convention.

What does the Part of Fortune mean?

In Hellenistic astrology Fortune stands for the body and the circumstances a person meets, and Spirit for the mind and what a person chooses to do. Their signs and rulers are read like any other place in the chart.