The 12 tropical zodiac signs are 12 mathematical abstractions from a central point that measure 30˚ (30 degree) increments of a 360˚ circle. When doing mathematical calculations in astrology, it is best to convert each zodiacal degree into its geometrical equivalent.
These help when calculating the following:
- Birth Chart Calculation
- Composite Chart Calculation
- Midpoints
| Zodiac Sign | Degree Range |
| Aries | 00˚ 00' 00'' – 29˚ 59' 59'' |
| Taurus | 30˚ 00' 00'' – 59˚ 59' 59'' |
| Gemini | 60˚ 00' 00'' – 89˚ 59' 59'' |
| Cancer | 90˚ 00'00'' – 119˚ 59' 59'' |
| Leo | 120˚ 00' 00'' – 149˚ 59' 59'' |
| Virgo | 150˚ 00' 00'' – 179˚ 59'59'' |
| Libra | 180˚ 00' 00'' – 209˚ 59'59'' |
| Scorpio | 210˚ 00' 00'' – 239˚ 59'59'' |
| Sagittarius | 240˚ 00' 00'' – 269˚ 59'59'' |
| Capricorn | 270˚ 00' 00'' – 299˚ 59'59'' |
| Aquarius | 300˚ 00' 00'' – 329˚ 59'59'' |
| Pisces | 330˚ 00' 00'' – 359˚ 59'59'' |
