Synastry Chart Calculator
Compare two birth charts side by side. This free synastry chart calculator reads the Sun, Moon, Venus and Mars connections between you, your elemental balance, where the friction lives, and how the relationship actually feels day to day.
What a synastry chart shows
Planet-to-planet aspects
Sun, Moon, Venus and Mars contacts between the two charts — attraction, warmth, and friction.
Elemental balance
How fire, earth, air and water mix between you, and what that does to your everyday rhythm.
Honest growth edges
Where the relationship strains, said plainly — not a flattering score and nothing else.
How to read your synastry chart
Synastry compares two natal charts rather than reading one alone. Birth dates are enough for a solid reading; adding birth times and places sharpens the Moon and rising placements, which is where the emotional detail lives. Start with the Sun and Moon connections for the overall temperature, then read Venus and Mars for attraction style, and finish with the friction section — that is usually the most useful part.