Part of Fortune
What is my Part of Fortune?
The Part of Fortune is an Arabic lot: a point built out of your Ascendant, your Sun and your Moon. All three go into the formula, so this one needs your birth time.
Day births and night births use different formulas
The traditional rule is sect sensitive. If you were born while the Sun was above the horizon, the lot is Ascendant plus Moon minus Sun. If you were born at night, the two luminaries swap places: Ascendant minus Moon plus Sun. Plenty of calculators, including some well known software defaults, apply the day formula to everybody. For a night birth that lands the point in a different sign roughly nine times out of ten, which is why people find three sites and get two answers. We check whether the Sun was above or below your horizon, use the matching formula, and print what the other convention would have given so you can compare directly. If you prefer the single formula school, the number is there.
What the Part of Fortune describes
The lots, or Arabic parts, are calculated points from Hellenistic and medieval astrology, worked out by measuring the distance between two chart factors and projecting it from a third. The Part of Fortune is the oldest and by far the most used of them. Traditionally it was tied to the body and to livelihood, the material side of a life, and it was read alongside the Moon rather than on its own. Modern practice usually softens it into ease and flow: the area of life where things tend to come together with less friction than you expected. Both readings share an assumption worth keeping: it describes a place, not a promise.
If you do not know your birth time
There is no honest way around it here. The Ascendant is inside the formula, and the Ascendant moves through all twelve signs in a day, so a Part of Fortune calculated without a birth time is a random point. Birth certificates in many countries record the time, usually the long form rather than the short one. While you look for it, the placements that do not need the hour still work: your Sun, Venus, Mars and, on most days, your Moon.
Frequently asked questions
What is the Part of Fortune?
An Arabic lot, meaning a point calculated from other chart factors rather than observed in the sky. It takes the angular distance between your Sun and Moon and projects it from your Ascendant. In traditional astrology it was read as the body and livelihood; in modern practice it is usually read as where life flows with less resistance.
Which formula is correct, day or night?
The traditional answer is that both are, and which one applies depends on your chart's sect. Sun above the horizon at birth means a day chart and Ascendant plus Moon minus Sun. Sun below the horizon means a night chart and Ascendant minus Moon plus Sun. A minority of modern astrologers use the day formula for everyone. We use the sect sensitive rule and show you the other result too.
Why do calculators disagree about my Part of Fortune?
In nine cases out of ten it is the sect question above. The rest is house system, which changes which house the lot falls in but not its degree. If a site places your Part of Fortune in a different sign from ours and you were born at night, that site is almost certainly using the day formula for everyone.
Do I really need my birth time?
Yes. Your Ascendant is one of the three ingredients and it crosses the whole zodiac every 24 hours. Without an accurate time the result is not approximate, it is arbitrary. If your time is rounded to the hour, treat the sign as likely rather than certain and look at the degree we print.
Is the Part of Fortune about money?
Traditionally it was closer to livelihood and the body than to wealth, and modern practice has widened it to ease and flow. Either way it describes an area of life, not an amount in an account. A chart point cannot forecast income, and anyone telling you otherwise has stopped doing astrology.
Positions are computed with Swiss Ephemeris; the interpretation is editorial. How we work