Free Secondary Progressions Calculator
Secondary progressions advance your birth chart by one day for every year you have lived, translating the Moon's fast motion at birth into a slow-moving symbolic map of your inner development. This calculator finds your progressed chart for any date, and shows exactly how each progressed placement compares to where it started.How it works ↓
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Secondary progressions advance your natal chart by one day for each year of life, a symbolic technique for tracking gradual, internal development over time, distinct from the moment-to-moment weather of transits.
What secondary progressions are
Secondary progression takes a simple idea from the day of your birth and stretches it across your whole life: each day after you were born stands in symbolically for one year of living. Your progressed chart for age 30 is simply your natal chart moved forward 30 days.
This is not where the planets actually were. It is a symbolic technique, not a physical one. What makes it work is that the Moon moves fast enough in a single day to produce a genuinely different chart every couple of years, giving the technique something real to track.
Why the progressed Moon does most of the work
The Moon covers roughly one degree per day, so under the day-for-a-year rule it also covers roughly one degree per year of your life, a full sign change about every two and a half years. That is a fast, legible rhythm, which is why the progressed Moon's sign and house are the first thing most astrologers check.
The outer planets barely move in a single day, so under this technique they barely move across a lifetime either, progressed Pluto might cover a fraction of a degree in eighty years. This is exactly the gap solar arc direction exists to close, by giving every planet the same rate of motion instead of its own.
How to read your progressed chart
Start with the progressed Moon's sign and house. It is the fastest-changing factor and the clearest marker of which chapter you are currently in. The progressed Sun moves about a degree a year too, so it changes sign roughly once every 30 years, marking the widest chapters of a life rather than a specific year.
After the luminaries, look at progressed aspects the Moon and Sun are making to your natal planets, a progressed Moon or Sun reaching a natal point by exact degree is read as that natal placement coming into focus. Progressed angles come last, and only with a reliable birth time.
A progressed chart, not a real sky
It is worth being clear about what this chart is not: it is not today's actual planetary positions, which is what a transit chart shows. A progressed chart is entirely your own natal chart, moved forward by a symbolic day-per-year, comparing your progressed placements to your transits at the same moment mixes two different kinds of information.
Birth time and progressed angles
The progressed planets themselves (their signs, their aspects to the natal chart) hold up without a precise birth time, since they move so slowly that small time errors barely shift them. The progressed Ascendant and Midheaven are a different story: they move at the same rate the sky rotates, so an uncertain birth time can put them in the wrong sign entirely.
If your birth time is estimated, read the progressed planets and set the progressed angles and houses aside rather than trusting a rectified guess.
Secondary progressions alongside solar arc, transits and returns
Progressions and solar arc directions are usually read as alternatives answering the same question, the arc of your inner development, from two different mechanisms, one where each planet moves at its own pace and one where all of them move together. Most astrologers pick one as a primary lens rather than reading both in equal depth.
Both then sit underneath the faster techniques: a solar or lunar return frames a shorter stretch of time, and transits date specific weeks inside it. The progressed chart is the slowest-moving layer of the four, the one that changes the least from one reading to the next.
Frequently Asked Questions
How is secondary progression different from solar arc direction?
Both advance your chart forward, but progressions move every body at its own natural speed (the Moon fast, the outer planets barely at all) while solar arc directions move every body by the same uniform amount each year. Progressions describe development that happens on each planet's own timetable; solar arc gives every planet, including the slow outer ones, a chance to reach something in your lifetime.
Do I need my exact birth time for secondary progressions?
The progressed planets themselves do not depend on birth time, but the progressed Ascendant, Midheaven and houses do. Without an accurate birth time, read the progressed planets and their signs and leave the progressed angles and houses aside.
How often does my progressed Moon change signs?
About every two and a half years, since the progressed Moon advances roughly one degree per day-equivalent, meaning one zodiac sign, thirty degrees, takes around thirty months to cross. This is why the progressed Moon is the technique's fastest-moving, most frequently cited signal.
What's the difference between progressions and transits?
Transits show where the real planets are right now, overlaid on your natal chart. Progressions symbolically advance your own natal chart forward, one day per year of life, to track your inner development over time.