Horoscope

Vertex Sign Calculator

Calculate your exact Vertex position in the birth chart using astronomical formulas - no external APIs required.

Use 24-hour format (e.g., 13:30 for 1:30 PM)
Decimal degrees (N positive, S negative)
Decimal degrees (E positive, W negative)

Your Vertex Calculation

Vertex Position

House Position

Calculation Details

How This Vertex Calculator Works

This calculator uses pure mathematical calculations without relying on external APIs:

  1. Julian Date Calculation: Converts your birth date/time to Julian date for astronomical calculations
  2. Local Sidereal Time: Computes the sidereal time for your birth location
  3. House Cusp Calculation: Determines house positions based on your chosen house system
  4. Vertex Formula: Calculates the Vertex point using the intersection of the ecliptic and prime vertical
  5. Zodiac Position: Converts the Vertex's ecliptic longitude to zodiac sign and degree

The calculations are based on standard astronomical formulas used in astrology software.

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