WORLDWIDE LIVE ONLINE ASTROLOGY EDUCATION ESTABLISHED 1997
ASTROLOGY STUDY: NAT 7
Chart Calculations
Learn to calculate an astrological chart by hand using the ephemeris and book of tables — an essential skill for working astrologers and an international certification requirement.
NEW CLASSES COMMENCE
Monday 28 September 2026
7:00 PM – 8:30 PM EST
$520 USD
This course is open to the general public for those with beginner knowledge of astrology.
Prerequisite: For AstroCollege Diploma Program students, completion of NAT-1 through NAT-6 is recommended.
COURSE OVERVIEW
Learn to Calculate a Birth Chart by Hand
NAT-7 gives you the practical skills needed to calculate an astrological chart manually using an ephemeris and book of tables.
This is a vital skill for any working astrologer and is also an international certification requirement.
You will learn a widely accepted method of chart calculation and develop the confidence to work through the calculations step by step.
The course is designed to make chart calculation simple, rewarding, and easy to understand, giving you a practical foundation you can continue to use throughout your astrological studies and practice.
You will explore:
● Work with time and time zones
● Understand the relationship between time and distance
● Calculate Standard Time and Sidereal Time
● Work with the Midheaven
● Use an ephemeris
● Calculate Greenwich Mean Time
● Calculate planetary positions
● Identify retrograde planets
● Calculate Lunar Nodes
● Calculate Local Sidereal Time
● Work with Intermediate Longitudes
● Use Constant Decimal (CD) tables
● Calculate the Midheaven for Intermediate Longitudes
● Calculate house cusps
● Draw an astrological chart
● Calculate for Intermediate Latitudes
● Work with Solar Charts and Natural Charts
● Calculate Chiron, Vertex, Midpoints, and Declinations
Classes are held weekly.
WHAT YOU'LL COVER
8 Classes of Astrological Study
8 Weekly Classes
12 Weekly Classes
Class 1
Time, Distance & Sidereal Time
Explore the relationship between time and distance and develop an understanding of:
Standard Time
Time Zones
Sidereal Time
The Midheaven (MC)
Class 2
Ephemeris & Greenwich Mean Time
Learn how to work with an ephemeris and develop the skills required to calculate Greenwich Mean Time.
Class 3
Planetary Positions & Lunar Nodes
Learn how to calculate the positions of the planets and understand the role of planetary factors.
You will also work with:
Retrograde planets
Lunar Nodes
Class 4
Local Sidereal Time & Intermediate Longitudes
Learn how to calculate Local Sidereal Time (LST).
Explore:
Intermediate Longitudes
Constant Decimal (CD)
Tables
Calculating the Midheaven for Intermediate Longitudes
Class 5
House Cusps & Drawing a Chart
Work with the tables required to calculate house cusps and learn how to use your calculations to draw an astrological chart.
Class 6
Intermediate Latitudes, Solar Charts & Natural Charts
Learn how to perform calculations for Intermediate Latitudes and explore:
Solar Charts
Natural Charts
Class 7
Chiron, Vertex, Midpoints & Declinations
Expand your chart calculation skills by working with:
Chiron
Vertex
Midpoints
Declinations
Class 8
Final Exam
Complete your final assessment and demonstrate your understanding of the chart calculation techniques covered throughout NAT-7.
WHAT YOU'LL COVER
12 Classes of Astrological Study
12 Weekly Classes
Class 1
Historical Overview
History and Lineages of Astrology
History of Different Types of Techniques
Class 2
House Systems: Introducing Placidus
The Astronomy of House Systems
Quadrant vs. Non-quadrant House Systems
Idealized and Equal Division House Systems
The Ecliptic / Spatial Coordinates / Time-Based
Single-Axis Systems / Dual-Axes Systems
Timeline
Practice with more than one system, with focus on what planets change house
Why some astrologers work with two systems
Class 3
Working with Interceptions
How Interceptions Work
Interpretation of Intercepted Planets
Changes to Planets Ruling Houses
Class 4
The Angles
Ascendant / Descendant
Review of the Helmsman Concept
MC / IC
Eminence
Difference between the Angles and Angular Houses
Class 5
Lunar Nodes and Eclipses
Class 6
Other Calculated Points
Arabic Parts
Part of Fortune / Part of Spirit
Antiscia
Vertex
Class 7
Retrogrades and Synodic Cycles
Retrograde Cycles and Inferior Planets
Retrograde Cycles of Superior Planets
Synodic Cycles
Class 8
Lunar Phases
Using Phases in Aspects
Class 9
Other Points
The Big Four plus Chiron
Ceres
Vesta
Juno
Pallas Athena
Chiron
Class 10
Interpretation
Working with the Grammar of the Chart
Class 11
Chart Practicum
Class 12
Final Exam
Course details + materials
Everything You Need To Know
COURSE DETAILS
COURSE - NAT-7: Chart Calculations
PREREQUISITE - Open to the general public with beginner knowledge of astrology. AstroCollege Diploma Program students are recommended to have completed NAT-1 through NAT-6.
CLASSES - Weekly
SCHEDULE - 7:00 PM – 8:30 PM EST
COMMENCEMENT - Monday 28 September 2026
PRICE - $520.00 USD
SUGGESTED & SUPPLEMENTARY MATERIALS
The following suggested and supplementary materials are available through the AstroCollege online shopping area:
NAT-7: CHART CALCULATIONS
Ready to Master Chart Calculations?
Develop the practical skill of calculating an astrological chart by hand using an ephemeris and book of tables.
Learn how to work with time zones, Greenwich Mean Time, planetary positions, Local Sidereal Time, house cusps, intermediate latitudes, Solar Charts, Natural Charts, Chiron, Vertex, Midpoints, and Declinations.
Whether you are continuing your AstroCollege studies or developing your foundational astrology skills, NAT-7 gives you the opportunity to learn a widely accepted method of chart calculation step by step.
12 weekly classes exploring planetary archetypes, mythology, dignities and chart interpretation.
