Lot Activation Map
See your four principal lots as a coherent system. Find which lot is most active right now and what chapter each one is in.
In Hellenistic astrology, four lots form a coherent system that maps the fundamental domains of life. Fortune and Spirit are the primary axis: Fortune reflects material circumstances, health, and the body, while Spirit reflects career, purpose, and agency. Eros and Necessity are the derived axis: Eros reflects desire, attraction, and relationships, while Necessity reflects obligation, constraint, and duty.
Unlike isolated lot calculations, this tool presents all four lots as an integrated system. Their positions, their current chapters, and their activation by transiting planets reveal which domains of life are most energized right now.
Each lot occupies a specific degree of the zodiac in your natal chart. When transiting planets form major aspects to that degree, the lot becomes active: its themes intensify and its domain moves to the foreground of experience. The closer the aspect and the slower the planet, the more sustained the activation.
Beyond transit activation, each lot moves through zodiacal releasing chapters that divide life into longer periods governed by specific signs. When you create an account, you can see the full chapter landscape across all four lots simultaneously.
Calculate individual lots in detail: Part of Fortune, Lot of Spirit, Lot of Eros, Lot of Necessity. Or calculate all nine lots at once with the Arabic Parts Calculator.
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Calculate your Part of Fortune (Lot of Fortune) to find where luck, material well-being, and bodily circumstances play out in your chart.
Lot of Spirit Calculator
Calculate your Lot of Spirit to discover where willpower and purpose play out in your chart.
Frequently Asked Questions
What are the four principal lots?
Fortune, Spirit, Eros, and Necessity form a coherent system from Hellenistic astrology. Fortune maps material circumstances and health. Spirit maps career and purpose. Eros maps desire and relationships. Necessity maps obligation and constraint. Together they cover four fundamental domains of life.
What does it mean when a lot is active?
A lot becomes active when transiting planets form major aspects (conjunction, trine, square, sextile, or opposition) to its position in your chart. The closer the aspect, the stronger the activation. Outer planets (Jupiter through Pluto) carry more weight because their transits last longer.
What are lot chapters?
Each lot moves through zodiacal releasing periods that divide your life into chapters of varying length. These chapters are determined by the lot's position at birth and follow a fixed sequence through the signs. When you create an account, you can see which chapter each lot is currently in.
Do I need my exact birth time?
Exact birth time is required for chapter timing (zodiacal releasing) because lot positions depend on accurate house cusps. If you only know an approximate time, you can still see your lot positions and current activation, but chapter features will be disabled.
See the full chapter timeline
Track when chapters shift, how they converge, and what your lots looked like across your whole life.