Cast charts from 3000 BC to 3000 AD. Easy chart calculation and editing.

One click "Here and Now" function. Search for aspects in no time, search for planets on specific zodiac degrees (free choice, i.e. for ingress charts or select natal position for returns), phases of the moon, eclipses (Solar and Lunar. Excluding "Penumbral Eclipses", which aren't hardly eclipses at all. They are not visible and only of "academic interest", even for astronomers. Here You don't have to bother with them.) You get the most precise calculations due to the "Swiss Ephemeris" included in Mercurius


The ACS-Atlas with more than 255'000 places and the most precise time zone information available on the market is integrated. You can freely expand it by personal places.


Placidus, Regiomontanus, Alcabitius, Whole Sign Houses, Equal Houses, Porphyrius, Campanus


Aside from the regular tropical zodiac those Virgos among You who think they are Leos can choose between 17 different ayanamshas: Fagan/Bradley; Lahiri; Deluce; Raman; Ushashashi; Krishnamurti; Djwhal Kuhl; Yuketshwar; Jn Bashin; Babylonian (Kugler 1, 2 and 3); Babylonian (Huber); Babylonian (eta Pisces); Aldebaran as 15 Taurus; Hipparchos; Sassanian and Galactic Center as 0 Sagitarius.

Unfolding the chart

All predictive techniques a classical astrologer needs are available on one click. No bothering with searching screen after screen until I am finally where I want to be.

Primary Directions

Yes. Real Primary Directions according to Placidus, Alcabitius and Regiomontanus as well as the the AlcaPlaci version (using Placidian directions but Alcabitius house cusps).

Secondary Progressions

Both, Primary Directions and Secondary progressions include: Progressions/Directions to all natal places, fixed stars, ingress into signs and terms. Choose which factors You want to progress and which factors you want them to be progressed too!
Both of course will be shown as charts or you can see a speculum with the exact "hit" dates. (The drawing of the primary direction is a projection to the ecliptic. The exact hit dates can differ from the drawing, as every planet is directed according to it's own arc).

1 click Solar and Lunar Return

Using the time machine, you can step through solar/lunar return charts or progressions in an instant.

1 click prenatal eclipse and pre natal full/new moon

Mercurius calculates your prenatal lunation or eclipse chart with one click. It automatically recognises, if this was a solar or lunar eclipse and cast the chart. Same thing for the Syzygy. It automatically calculates, if you are a new- or full moon birth and gives you the chart with one click.


A list of exact start dates of major and sub periods is just one click away.


Not just "Move everything 30° per year"-Progressions, but real profections. For yearly profections, everything is progressed by one sign per year. From there, for every month one sign is progressed in the monthly progressions. And again from here you get your daily progressions. Choose if You want 1 sign per day or one sign per 2.5 days.


An clear overview of everything the traditional astrologer needs is given in easy to understand tables.


Besides the dignity graph which immediately shows you the value of the accidental and essential dignities directly beside the chart wheel, you can have a detailed table of all essential and accidental dignities. Of course You can set all point values as you like them. You can choose between Dorothean triplicity rulers or just day and night rulers. You can choose, if Mars or Venus are the day ruler for the Water triplicity. All accidental fortitudes and debilities as given by Lilly are included.

Additional Dignity stuff

Most influential Planet, Planet with most essential dignities and house-almuten. Receptions (positive mutual, positive mixed, negative mutual, negative mixed)


The temperament is calculated according John Frawley. You have several options to change: Include or ignore oriental/occidental or just include it, if the planet is in the same hemisphere as the sun, count the Asc twice, select the LoG or use the suggestion given by Mercurius. Calculation is done according to primordial qualities (Mix of hot, cold, dry and moist) and by temperament (mix of Choleric, Sanguine, Phlegmatic and Melancholic factors). All 5 factors are given in a separate list. Also the overall temperament is shown. Graphically and in words.

Lord of the Geniture is calculated as a suggestion, according to William Lilly.

Significator of Manner is calculated and given as additional information on the temperament sheet

Fixed Stars

We have included even more fixed stars than any other program and we included Robson's names. Show all of them or select them by magnitude. Show only the ones that are in conjunction with planets and house cusps in the natal chart. Orbs according to magnitude! Beside this, You can select fixed stars to be shown in the chart drawing and be included in directions/progressions. Besides the name and planetary nature, for every fixed star you will get the information in which constellation it is, when it rises, when it culminates, what the star name and the constellation name means in your language. Some of them even make sounds according to their nature.

Planetary hours

A list of all planetary hours for each day is given as well as the duration of a day or night hour. In the chart wheel, the planetary day and hour is automatically shown.


One page per month. From 3000BC to 3000 AD. Retrograde periods are clearly marked. Show or hide the invisible planets Uranus, Neptune and Pluto.

Lots or "Arabian Parts"

All Arabian parts as given by Biruni are included. No auto turning or not turning in day or night charts. You freely define the formula for day and night and this is used! So you can include parts that have totally different formulas in day and night charts like Asc + Sun - Dispositor of Sun in day charts and Asc + Moon - dispositor of moon in night charts. Yes, you can include Planets, house cusps, dispositors, house rulers, the Syzygy, the Dispositor of the SYZGY, the Part of Fortune and Spirit, House rulers et. al. in your formulas. You can add or change any Arabian part you want.

Elements and Modes

A handy table that tells you, how many planets are in fire, air, water and earth signs as well as in cardinal, fixed and mutable signs.

Night and day

Of course Mercurius distinguishes between night and day. But you can include an orb for this. The civil dusk for instance, where it is still possible to read a newspaper outside, even if the Sun already is "below the earth" ranges up to 6 degrees below the DC. Nobody would call this "night". Same thing with dawn. It is bright light before the Sun actually crosses the Asc. Therfore You can set an orb within which the chart still/allready is a day chart, even if technically the Sun is just in the 6th or still in the 1st house. This is important for dignity-calculation as well as for Arabian parts.


Show one chart (also as full screen mode with hidden data for teachers), show two charts side by side, show synastry. Show the "Soul-Chart":Arabian parts are projected to the outside of the chart. You can use the "Natal Arc Projected Parts" for the Architecture of the Soul (see Astrologers Apprentice No 21) The 7 key-parts always are given. You can select up to 18 more parts to be shown here. Turn the chart: You have a question about your cat? Turn the chart so house 6 will become house 1. BUT: It will not be moved to the actual AC place. Just the house numbering will change. Otherwise one could think: AH, if house 6 is house 1 now, then actually house 6 is an angular house. This is wrong and therefore we chose a different way to show the turned chart.

Eye of Horus

Besides the usual aspect grid, which recognises sign boarders and does not show aspects that are no aspects, because there's a sign border involved (unless you ignore this, then also out of sign aspects are given), we have the "Eye of Horus" function. Clicking on a planet will show the "rays" of this planet and draws its orb circle around the end of the ray. All other orb circles also are shown. So You immediately see, if something is applying/separating but still in the "moiety of Orb". Click again to hide the rays.

Application Bar

Beside the chart You always will find a graph that shows which planet applies to which. Select the orb circles, if You want to see them.

Dignity Graph

Beside the chart You always will see a graph that shows the amount of dignity (essential and accidental as separate bars) each planet has. This is a great tool for elections, if combined with the time machine
Time Machine

Moves any chart (natal, progressed, directed, solar returns, Luna returns and so on) forward or backward through time, according to the chosen system. So Lunar Return will always skip forward to the next lunar return, solar returns to the next solar return, progressions will move forward 1 day per year and so on. You can do this step by step or as an animation that runs on it own until you stop it


Here You see an animated version of the geocentric solar system. The earth surrounded by the 7 planetary spheres and by the sphere of the fixed stars. You can travel into the future and watch the crazy dance of Mercury and Venus around the Sun, or admire the gravity of Saturn. This is what happens "out there". But sitting outside for 28 years to watch one full Saturn cycle is a little tiresome, so you can speed this up as you want.

Database Management

Create and manage as many databases for charts as you want

Aaf Format

Charts are stored in Aaf format. So if Your current software allows a clean export for Aaf files, you just can use them without any effort in Mercurius.

Copy Chart

Copy the chart wheel to clipboard as vector based graphic for use in other applications
Unlimited Chart Notes

Aren't You bothered with that 500 words you can add as a chart note in most programmes? Well, You even can write a book for each chart in Mercurius. It uses your standard text editor (i.e. Microsoft Office Word) and connects it to the chart. So write as much as you want. It will be saved with the chart as an rtf file and opened again, each time you click on the "Notes" button when you have the chart on the screen.

Advanced Printing

High quality printing of charts and tables.

1 click selection of charts

Recall the last 5 charts You worked on with one click.

Easy settings

Set up Your zodiac, your orbs, dignity-values, your default location, fixed stars to be shown in chart, Arabian parts and much more in an easy, intuitive manner.

Advanced Layout

Full control over layout. Select colours, chart style (square or round), colour terms and faces in the colours of the planets to immediately see, in which term or face a planet is, colour house modes as You like (Lilly's colours for instance, or distinguish cardinal, succedant and cadent houses), choose which planets will be shown, choose if you want the glyphs of the signs in colours or if you prefer the 12 sections of the zodiac circle coloured and much more