Tools

Astrological calculation tools — free, no sign-up. Calculations use the tropical zodiac and the Whole Sign house system; see the Astrology hub for the historical context behind each element.

• Birth ChartEnter your birth date, time, and place to calculate the planetary positions, Ascendant, Midheaven, and the 12 houses of your birth chart. Exact time matters — the Ascendant changes every few minutes.
• Lunar CalendarCheck the Moon phase for any date — today, a specific month, or a date in the past or future — along with illumination percentage and the dates of the next new moon and full moon.
• AstrocartographyAstrocartography projects your birth chart's planetary positions onto a world map, showing which longitudes place each planet on the Midheaven (MC) or Imum Coeli (IC) angle, and which latitudes place each planet on the Ascendant (AC) or Descendant (DC). First version: lines calculated from each planet's ecliptic position with ecliptic latitude approximated as zero — sufficient for most reference uses, but not a substitute for professional-precision software.