D9 Chart Calculator __link__

For a computerized D9 calculator, the logic follows this structure:

For example: If you have Mars at 12 degrees Aries in your D1, the calculator knows that 12 degrees falls into the 2nd amsa (division) of Aries. It then moves Mars to the 2nd sign from Aries, which is Taurus, in your D9 chart. d9 chart calculator