Your Sun sign is one placement out of ten. This free calculator weighs your whole chart — every main planet, plus aspect strength — to show which sign, element, and planet actually lead it, in Tropical and True Sidereal side by side.
Five systems. Your composition in 60 seconds.
The dominant sign is the sign that carries the most weight in your birth chart once every main planet is counted — not just the Sun. A chart with the Sun in Leo but Mercury, Venus, and Mars in Virgo runs on more Virgo than Leo, and usually feels like it.
That is why Sun-sign descriptions ring false for so many people. Dominance looks at the whole pattern: which sign appears most, which element and modality outnumber the rest, and which planet the rest of the chart keeps answering to.
Sign, element, and modality: the calculator counts every main planet's placement. The sign with the most planets is your dominant sign; the same counts grouped by element (fire, earth, air, water) and modality (cardinal, fixed, mutable) give the chart's temperament.
Dominant planet: every aspect a planet makes contributes a score weighted by how exact it is. The planet with the highest total aspect strength is the most connected body in your chart — the one most woven into everything else.
Two zodiacs, side by side: dominance is computed twice — against the tropical zodiac and against true sidereal (real IAU constellation boundaries, Ophiuchus included). Where both agree, the signal is strong.
Pattern language, not verdicts: dominance describes emphasis in the chart, not a box you have to fit. Use it as a lens, not a label.
The zodiac sign holding the most weight across your whole chart, not just your Sun. The calculator counts every main planet's sign; the sign that appears most often leads the chart, and close seconds show a chart with more than one strong flavor.
Yes, and it is common. If several planets cluster in one sign while your Sun sits alone in another, the cluster carries more of your chart. That is often why people don't fully relate to their Sun-sign description.
By summed aspect strength: every aspect a planet makes contributes a score weighted by how exact it is. The planet with the highest total is the one most woven into the rest of your chart.
Both. Dominance is computed against the tropical zodiac and against true sidereal (real IAU constellation boundaries, including Ophiuchus) and shown side by side. When both zodiacs agree, that signal is worth taking seriously.
Yes. The full result — dominant sign, element, modality, and dominant planet in both zodiacs, plus your complete chart with aspects and houses — is free and requires no email or signup.
Each sign belongs to an element (fire, earth, air, water) and a modality (cardinal, fixed, mutable). Counting your main planets by both shows the chart's overall temperament — an earth-heavy, fixed-heavy chart tends toward steady, build-and-hold patterns.