Zodiac Sign Compatibility Calculator

Free zodiac compatibility test: enter two birth dates and find out, in plain language, what draws the two signs together and where they clash. Temperaments, pace, one way to make it work and an affinity score tied to the angle between the signs (trine, square, opposition…). Sun signs come from the Sun's real position, so cusp birthdays are right.

It factors in trine, square, opposition. Change any of them and the output follows immediately.

Looking up what a birth date or a name is said to mean: a sun sign, the rest of a birth chart, a life-path number, or the same for someone else before a conversation about it.

Taking a sun sign as the whole chart. Someone born a day either side of a cusp changes sign depending on the year and the time of day, and the moon and rising signs move much faster than the sun does — a birth time is what separates a chart from a guess.

They sit next to each other but answer different questions. Moon Sign Compatibility Calculator: compare two people's Moon signs and get an elemental compatibility score and reading, with famous-couple presets. Positions from the full Meeus/ELP-2000 series (arcminute level); for entertainment. Pick whichever matches what you're starting from — both are free.

Zodiac Sign Calculator is the closest one after this: Find your Western sun sign from your birth month and day, with its symbol, element, ruling planet, dates and a short trait profile.

Birthstone & Zodiac Flower Finder and Celtic Tree Zodiac Calculator — they come up in the same task often enough to be worth a second tab.

The positions are computed from real ephemeris arithmetic, not from a fixed table of dates, so a cusp birthday lands on the right side of the boundary for its own year. What those positions are taken to mean is tradition, not measurement, and the tools present it as such.