Vedic Astrology Software

Please visit the authors webpage for latest software


Various computations needed by serious Vedic astrologers and Vedic astrology researchers.


This program will work on Windows 95, Windows 98, Windows Me, Windows NT, Windows 2000, Windows XP, Windows Vista and Windows 7 computers. It will not work on old Windows 3.1 systems. It will not work on Macintosh/Apple systems with MacOS operating system, iPads, iPhones, Android devices such as phones and tablets and other non-windows systems such as Linux, Unix, Solaris etc systems.

But people are using it on MacOS and linux using windows simulators. If interested, read some information on it.

About the author

This software was designed and written by P.V.R. Narasimha Rao. He is a software engineer and astrologer hailing from India and living near Boston, US. He has engineering degrees from IIT, Madras/Chennai and Rice University, Houston. He is also a Sanskrit scholar. He authored a textbook, many magazine articles and research articles and teaches astrology near Boston. You can read more about him here.


In terms of the range of calculations available, technical depth and breadth, level of customizability of calculations and ease of use, Jagannatha Hora is unsurpassed by any contemporary Vedic astrology software package. If interested, please check out a nearly complete list of the features.


To download any of the following zip files, click the right mouse on the “Download” link and select “Save target as” in the pop-up menu. The corresponding zip file will be saved on your computer in the directory you choose. Go to that directory in a windows explorer. Locate the zip file and unzip it. You will get a file with the same name, with .zip in the file name replaced by .exe. Run the executable by double-clicking on it. The corresponding installation should start in a few seconds. Read the instructions and follow them. The first screen may give a security warning about an unknown publisher. If you give permission to the installer executable to run by clicking “Run”, the installation will proceed.

Read the following carefully and choose the version to download.

1. (2.6 MB): If you already have Jagannatha Hora version 7.3 (or higher) operational on your computer, you only need this update to move to the latest. Download
2. (3.7 MB): Fresh and short installation of Jagannatha Hora. It contains accurate ephemeris for 1800-2400 AD and uses an approximate analytical model for other dates in 2999 BC-3000 AD. It has a very very small atlas with some important cities. Download
3. (102.0 MB): Fresh and full installation of Jagannatha Hora. It contains accurate ephemeris for 12899 BC-16900 AD. It has a larger atlas with 2.5 million cities. Download

Note: The full version of 8.0 has many more ephemeris files than the full version of 7.66. The “update” does not automatically install all those files. If you want the full range (12899 BC-16900 AD), you should download the full version and install it.

Note: The zip files do not have any problem with them. Many people have successfully downloaded and installed the software. If you are unable to unzip them after downloading them or unable to install, it means that your download did not succeed for some reason. Keep trying until you succeed. We cannot help you with this and there is no use in sending us an email.

We do not distribute or sell the software in CDs. You have to download the software from the internet. You may also try to find someone who has already downloaded it and get them to make a CD for you.

Thank you for using this software. Please use it to help people and to conduct researches to enrich our collective understanding of Vedic astrology. It is the author’s earnest and sincere hope that your use of this software will result in a lot of souls being helped and also in a renaissance in the knowledge of Vedic astrology!

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Om Sree Vaache Namah: Om Sree Brihaspataye Namah: Om Sree Gurubhyo Namah

Ashtakavarga is a popular method in India for making predictions. Maharishi Parasara said that the intellectual pygmies of Kali Yuga cannot make intelligent compromises and mix various principles. He said that they need a simple system for making good predictions. He presented Ashtakavarga as that simple system.

The list of benefic and malefic houses for each planet with respect to the eight references – Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn and Lagna – can be found in classics. Based on these, we prepare bhinna Ashtakavarga (BAV) of each planet. Each Rasi in the BAD of a planet contains the number of references with respect to which the planet is benefic in that Rasi. We prepare “Samudaaya Ashtakavarga” (SAV) by adding the BAVs of the seven planets. To get the score in Vi in SAV, for example, we add the scores in Vi in the BAVs of the seven planets.

Parasara taught that houses falling in Rasi’s with a score of 30 or more are fortified and houses falling in Rasi’s with a score of 25 or less are weakened. Moreover, planets transiting in Rasi’s with a score of 30 or more tend to produce good results and planets transiting in Rasi’s with a score of 25 or less tend to give bad results.

Let us take the Rasi chart of Indian Prime Minister Sri A.B. Vajpayee (see Chart 1). Readers may find SAV of Rasi and D-10 and verify the following:

SAV of Rasi chart (See Chart 1) Ar Ta Ge Cn Le Vi Li Sc Sg Cp Aq Pi
Rekhas 29 22 27 29 28 38 29 26 23 34 28 24
Chart 1

In Rasi chart, the 11th house has the maximum number of rekhas (38) showing excellent gains. The 3rd house of communication has 34 rekhas. This fortifies the 3rd house. That can mean that he is an excellent communicator, orator or poet. Sri Vajpayee is indeed a good poet and an excellent orator. So it makes sense.

Though Sri Vajpayee’s career wasn’t a bed of roses – he struggled in the opposition parties for most of his career – he finally became India’s Prime Minister and one must agree that he had a very successful career. And he is known as a man of great character. With Lagna and the 10th house in the SAV of Rasi chart containing only 26 and 28 rekhas – which is just average – why did he have such a successful career?

The answer lies in the SAV of D-10. Contrary to popular belief, Ashtakavarga is equally applicable in divisional charts. When we analyze divisional charts with respect to Lagna, we may as well analyze them with respect to the eight references. Parasara defined all the divisional charts and the areas of life seen in them, at the very beginning of “Brihat Parasara Hora Sastram” and most of the concepts discussed by him in later chapters apply to all the divisional charts.

SAV of D-10 chart (see Chart 2): Ar Ta Ge Cn Le Vi Li Sc Sg Cp Aq Pi
Rekhas 23 26 33 20 28 33 26 35 28 31 24 30
Chart 2

Lagna in D-10 is Sc and it contains 35 rekhas – maximum in D-10’s SAV. Arudha Lagna also contains more than 30 rekhas. These factors explain his success and good name. The 3rd house in D-10 also has more than 30 rekhas – like in the Rasi chart – and that increases the chance of being an excellent communicator in public life. Moreover, the significator of communication Mercury and the artistic Moon are in the 3rd house (in addition to more than 30 rekhas).

Though D-10 is powerful with Lagna and Arudha Lagna containing more than 30 rekhas, one may notice that the 8th house in D-10 (Ge) has 33 rekhas. This explains the struggle in Vajpayee’s career.

Thus we can get insights into the strength or weakness of various matters pertaining to an area of life by looking at the SAV of the related divisional chart.

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