What a natal chart is
A natal chart (birth chart) is a map of the sky at the moment you were born: where the Sun, the Moon and the planets were, which signs they occupied and how they were positioned relative to the horizon. It is calculated for the exact time and place of birth, so even twins born an hour apart have different charts.
Our calculator uses astronomical ephemerides; the planetary positions match professional astrology software to within a fraction of an arc minute. Houses are calculated in the Placidus system.
What each planet means
- Sun — your core, character and what gives you energy
- Moon — emotions, needs, what makes you feel safe
- Mercury — thinking, speech and how you learn
- Venus — love, taste, what attracts you in people
- Mars — passion, drive and how you act and argue
- Jupiter — growth, luck and where things come easier
- Saturn — responsibility, limits and life lessons
- Uranus, Neptune, Pluto — slow planets of a whole generation; personal through houses and aspects
Why the birth time matters
The Ascendant changes sign about every two hours and the houses depend on the minute of birth. Without the time the planets are still calculated precisely, but the Ascendant and houses are not. If you do not know the time, tick “I don’t know the exact time” — the result will be shorter but correct.
Natal chart and relationships
Your chart shows how you love — but in a couple what matters is how your chart meets your partner’s. Venus in one chart and Mars in the other, Moon and Moon, Saturn and the Sun: these connections (synastry) show attraction, emotional comfort and how long-lasting a union is.
After your natal chart you can add your partner’s data and get a free compatibility result. The full PDF reading of the couple costs from $7.