Birth date
The calendar date establishes the planetary positions used in the natal chart.
FREE NATAL CHART
Free birth chart calculator and interpretation.
A birth chart maps the Sun, Moon, planets, angles, houses, and aspects for one moment and place. Roho calculates those positions first and keeps them separate from the interpretation.
Calculate my free birth chartWhat you need to calculate a birth chart
Birth time
An exact time determines the Ascendant and houses. If it is unknown, Roho should identify what cannot be calculated reliably.
Birthplace
Latitude, longitude, and the applicable historical time zone locate the sky relative to the horizon.
How Roho calculates your natal chart
Roho resolves the entered local time to UTC, determines the birthplace coordinates, and calculates planetary longitudes and chart angles. The resulting chart is versioned so later interpretations refer to the same underlying facts.
The calculation and the reading are different layers. Positions and aspects are mathematical outputs; their astrological meaning is interpretive. See the full calculation methodology for systems, limitations, and correction procedures.
How to begin reading the chart
- Start with the Sun, Moon, Ascendant, and chart ruler.
- Note the houses occupied by the planets.
- Identify the strongest aspects and repeated elements or modalities.
- Synthesize repeating themes instead of reading every placement in isolation.
- Record uncertainty when the birth time is approximate or unknown.
Use the original annotated chart-anatomy diagram, then continue with Sun, Moon and rising signs, the twelve houses, and planetary aspects. Look up unfamiliar language in the sourced glossary.
What a birth chart cannot promise
A chart does not guarantee an event, diagnose a condition, establish compatibility as fact, or replace qualified professional advice. Roho presents astrology as a reflective and educational practice and identifies uncertainty rather than filling gaps with invented precision.
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