Free Lot of Children Calculator

The Lot of Children is a calculated point used in Hellenistic astrology to read offspring and fertility. It sits at the Ascendant plus the distance from Jupiter to Saturn. The sign, house, and ruler of the lot shape the interpretation more than the degree alone.

The lot belongs to an older school of astrology that does not get much modern airtime. Hellenistic astrologers from the first centuries CE used dozens of calculated points like this one, each pointed at a specific life topic. The Lot of Fortune handled prosperity. The Lot of Spirit handled vocation. The Lot of Children handled, as the name says, the question of offspring and the family line.

What makes a lot different from a planet is that it is not a body in the sky. It is a derived point: an addition and a subtraction. The math is simple. The interpretation is not.

You enter birth date, time, and place. The page geocodes the location, computes the Ascendant for that moment, and reads Jupiter and Saturn longitudes from the same ephemeris that powers every other chart on the site (NASA/JPL solar system data via the ANISE library, served by Augurine's Rust astro-service).

Default (Dorothean, unreversed): day chart = night chart = Ascendant + (Saturn − Jupiter).

Medieval toggle (sect-reversed): day chart matches the Dorothean reading; night chart reverses to Ascendant + (Jupiter − Saturn).

The result is a single point on the ecliptic between 0° and 360°. The page resolves it to a sign and a house using your chosen house system (whole sign by default for traditional work, configurable from your profile). The result panel shows the exact arithmetic so you can check the math against your sources.

Hellenistic astrologers read a lot in four passes.

The sign. The sign sets the underlying tone. The classical fertility ranking from Dorotheus runs Pisces, Cancer, Scorpio, Sagittarius, Taurus, Capricorn, Libra, Aquarius, Aries, Gemini, Leo, Virgo. Pisces and Cancer were treated as highly fertile. Leo, Virgo, and Gemini were treated as signs of low fertility. This is not a literal forecast; it is a description of the texture of the topic in your chart.

The house. The house tells you where the topic concentrates. Lot of Children in the fifth puts the topic in its natural home, since the fifth was the classical house of children. In the tenth, it can read as career-flavored or public-image-flavored. In the twelfth, the question may show up hidden, deferred, or interior.

The ruler. The ruler is the planet that rules the sign the lot falls in. Ask what house the ruler is in, whether it is angular or cadent, whether it is in its own sign or another planet's territory, and whether Jupiter, Venus, Saturn, or Mars aspect it. Reception matters: a Jupiter that receives the ruler kindly reads warmer than one that does not.

The aspects to the lot itself. Benefic aspects (sextile, trine) from Jupiter and Venus read as supportive. Hard aspects (square, opposition) from Mars or Saturn read as obstructions or losses. A conjunction to the lot gets more weight than an aspect from across the chart.

A serious Hellenistic fertility reading is not a lot reading. It is a fifth-house reading, supplemented by Jupiter, the Moon, and then the Lot of Children. Read the lot in context.

Sect is the Hellenistic distinction between day charts (Sun above the horizon at birth) and night charts (Sun below). Several lot formulas reverse for night, including Fortune and Spirit. The unsettled question is whether the Lot of Children belongs in that reversing group.

Unreversed (default). Dorotheus did not reverse the formula. Paulus Alexandrinus argued explicitly against reversal. Modern Hellenistic teachers, including the editors at Seven Stars Astrology, side with this reading. The argument is that sect does not apply universally; some lots are absolute.

Reversed (toggle). Medieval astrologers, including Lilly and Gadbury, treated the Lot of Children like Fortune and Spirit and reversed it for night births. The argument is that sect is a structural principle and applies broadly to topic lots.

You do not have to pick. Use whichever convention your teacher or tradition uses. If you are new to the question, the unreversed default is the older convention and the more defensible one in print.

This is the question most people are actually asking when they search "lot of children calculator." The honest answer is that the lot was never a fertility prediction tool, and no Hellenistic astrologer treated it as one.

The question of number of children belongs to a separate Dorothean procedure, sometimes called the triplicity-ruler method. You find Jupiter in the natal chart, identify the three triplicity rulers for the sign Jupiter occupies, pick the strongest by dignity and angularity, and count signs from that ruler back to the Ascendant. We do not ship a calculator for that procedure yet; when we do, this page will link to it.

For now, treat the Lot of Children as a qualitative indicator: what is the texture of children in your life, not how many. If you want to widen the family-line picture, related lots help: Lot of Sons (Valens, ASC + Mercury − Jupiter) and Lot of Daughters (Valens, ASC + Venus − Jupiter) cover gendered offspring lots in Valens' Anthology. The Lot of Marriage adds context on partnership. The Arabic Parts Calculator computes the full Hermetic set in a single view.

Astrology does not override medical context. If you are trying to conceive and looking for answers, a lot reading is symbolic, not prognostic. Use it as a contemplative tool, not a clinical one.

Every value this calculator shows comes from sources you can check.

Primary sources for the formula. Dorotheus of Sidon, Carmen Astrologicum, Book II (first century CE) for the unified Lot of Children. Paulus Alexandrinus, Introductory Matters (fourth century CE) for the unreversed-by-sect position. William Lilly, Christian Astrology (1647) and John Gadbury, The Doctrine of Nativities (1658) for the medieval sect-reversed variant.

A note on Valens. Vettius Valens' Anthology, Book II did not use a unified Lot of Children. Valens kept Sons and Daughters as separate lots. If you want a Valens-style reading, use those two separately rather than treating the Lot of Children as a Valens lot.

Ephemeris. Planetary positions come from NASA/JPL solar system data via the ANISE library. The Rust astro-service handles every chart computation on Augurine, so the Lot of Children you see here uses the same numerical pipeline as your natal chart, transits, forecast, and timing readings.