Western Astrology Chart Study Hub

Study LevelIntro

House SystemPlacidus

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Study Path

Reading Method

Chart Lab

Chart Name House System Rulership Mode

Reading Focus Chart Type Study Lens

Chart Notes

Chart Study Output

Placement Table

Point	Sign	House	Aspect or Note	Study Tag

House System Settings

House System Latitude Sensitivity Reading Style

System Lens

House System Library

Placement Builder

Planet or Point Sign House

Interpretive Level Question Type

Placement Interpretation

Aspect Lab

Planet A Aspect Planet B

Orb Motion Chart Context

Aspect Reading

Astrology Library

Practice Note

Title Note

Saved Study Notes

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Ephemeris-grade · Astronomy Engine (VSOP87)

Advanced Chart Calculator

Enter a birth city — we'll handle coordinates, timezone, and historical DST automatically. Calculations run entirely in your browser with arcminute accuracy.

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Birth Time (local, 24h)

Don't know? Try 12:00 (noon chart)

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House System

Lunar Nodes

Aspect Orbs

Fill in the fields above and click Calculate Chart.