Compatibility calculator by date of birth
Sun signs alone say little about a couple. Enter both birth dates: we calculate the Sun, Moon, Venus and Mars of each of you and show only the contacts between your charts that hold for the whole birth day, whatever the time and city.
Element compatibility of the signs
Fire and FireTraditionally a lively, fast pair: lots of energy and enthusiasm; the task is not to burn out.
Fire and EarthTraditionally drive meets steadiness: one starts, the other builds; different speeds to agree on.
Fire and AirTraditionally an easy match: air feeds fire, ideas turn into action, plenty to talk about.
Fire and WaterTraditionally passion and feeling, with steam: strong attraction, different ways of reacting.
Earth and EarthTraditionally a stable, practical pair: shared goals and reliability; keep room for surprise.
Earth and AirTraditionally practice meets ideas: one grounds, the other inspires; needs patience on both sides.
Earth and WaterTraditionally a nurturing match: water softens earth, earth gives water a shape.
Air and AirTraditionally a pair of minds: conversation, freedom, friends; feelings need words too.
Air and WaterTraditionally head meets heart: one explains, the other feels; listening is the bridge.
Water and WaterTraditionally a deep, intuitive pair: you sense each other without words; moods run together.
Questions
How is compatibility calculated by date of birth?From the positions of the Sun, Moon, Venus and Mars of both people on their birth dates and the aspects (angles) between them. We count with an astronomical ephemeris, not tables of sign pairs.
Is compatibility of zodiac signs enough?Sun signs give the element match, the most general layer. Venus, Mars and the Moon say more about love and everyday life, which is why they are on this page.
Why are some Moon signs shown as two?The Moon moves about 13° a day and changes sign every two to three days. If that happened on a birth date, only the birth time and city decide which sign it is, so we show both.
Is it free?Yes, the calculator is free and needs no sign-up. “You & Me” for a couple is free for the first 5 days.