Aries and Aquarius compatibility: can you argue about ideas without it getting personal?

Compare Aries and Aquarius by sign or birth date

The two Sun signs are filled in below. Switch to two birth dates and we look up Sun, Mercury, Venus and Mars for both of you, so you can read the placements for your own dates. Uncertain signs are flagged. No birth time and no account needed.

Birth-date positions use Swiss Ephemeris calculations based on NASA JPL planetary data. Read about the data and precision. The historical date tables below use a separate PyEphem calculation.

A sextile, and a triangle that leaves out Aries' ruler

Ptolemy explains why a sextile counts as harmonious: such aspects 'are composed of signs of the same kind', here two masculine signs (Tetrabiblos I.13). That's the classical root of the modern idea that fire and air signs feed each other.

He also describes the air triangle, Gemini, Libra and Aquarius, as 'having no relation to Mars but rather to Saturn and Mercury because of their houses', with Saturn governing by day and Mercury by night (I.18). So the ruler of Aries has no role in Aquarius's triangle, and the two planets that do are the ones astrology ties to structure and reasoning. Read as symbolism, Aquarius argues from principle. Aries argues from conviction, and Mars takes things personally.

Aquarius can say something sharp about an idea and mean nothing by it, and Aries can hear it as a comment on them. Aries can push hard because it cares, and Aquarius can read that as a lost temper. Either partner can sit on either side of this, whatever the Sun signs say.

The news story over coffee

Back to that morning. The story was about, say, banning cars from downtown. One partner thinks it's obvious. The other plays devil's advocate because it's fun. Twenty minutes in, the fun one says 'you always get worked up about this stuff'. Now the argument is about who's worked up, and the cars are forgotten.

The turn usually comes with one word, and the word is 'you'. 'That doesn't follow' is about the idea. 'You only think that because' is about the person. Plenty of friendly arguments go wrong right there, and once you start listening for it, it's easy to hear.

Sport or settle: say which kind of argument it is

Some arguments are for sport. You're testing an idea, enjoying the back and forth, and nothing needs deciding. Others are for settling: where to live, whether to lend your brother money, how often you see each other's friends. They need different rules, and this pair tends to run them the same way.

So name it at the start: 'Are we deciding something, or just sparring?' In a sparring match, whoever loses the point can say so and laugh. If you need a decision, stop playing devil's advocate and say what you actually want.

Agree on a way to call time, too. One of you says 'I've stopped enjoying this', and the other stops, even mid-sentence. And keep a short list of topics that are never for sport: family, money worries, anything about the other person's body or past.

Mercury rarely shares an element here

Their Mercury signs, which astrology reads for thinking and talking, share an element in only 10.5% of modeled pairs of Aries and Aquarius dates, the lowest of the twelve Aries pairings. Mercury for an Aries Sun sits in Pisces, Aries or Taurus, and for an Aquarius Sun in Aquarius, Capricorn or Pisces. It was in Capricorn on 34.5% of sampled Aquarius Sun dates.

A different element isn't the same as a hard conversation. The most common Mercury arrangement repeats the Suns, Mercury in Aries with Mercury in Aquarius, at 25.1% of modeled pairs, and that's the same easy fire and air sextile. The arrangements that leave it behind change the argument. A partner with Mercury in Capricorn argues like someone building a case; one with Mercury in Pisces argues from a feeling they haven't put into words yet. The Aries and Aquarius calculator takes two birthdays and shows which Mercury signs are actually having the argument.

Venus signs are identical in 12.1% of modeled pairs, and Venus in Aries with Venus in Capricorn is the most common Venus pairing, at 9.4%.

The Aries and Aquarius date-sample estimates

These estimates pair two dates drawn independently from the 1950–2005 sample, with equal weight for every date within each Sun sign. They describe planetary combinations, not observed couples or relationship success.

Most common Venus pairings in this model: Aries with Capricorn (9.4%), Aries with Aquarius (8.1%), Aries with Pisces (7.8%). Venus signs are listed in Aries Sun, then Aquarius Sun order. Mars can occupy any sign with either Sun sign. The most frequent Mars signs on sampled Aries dates are Taurus (14.3%), Gemini (12.3%), Aries (11.4%), Aquarius (10.2%), and on Aquarius dates Sagittarius (12.8%), Pisces (12.3%), Aries (11.7%), Scorpio (10.9%).

Our sample takes Sun, Mercury, Venus and Mars at noon UTC on every calendar day from January 1, 1950, to December 31, 2005 (20,454 days), each with equal weight. Pair figures combine one Aries date and one Aquarius date drawn independently. They describe which placements turn up together on dates and can't say how any couple argues or whether it lasts.

Calculation method and downloadable date-sample tables

When the easy match starts having problems

When a match is supposed to be easy, a rough patch can feel like proof that something's badly wrong. Often it's narrower than that. One partner has stopped feeling heard in arguments, and the other hasn't noticed, because to them nothing personal was said. Freedom can be the other sore spot. Aries tends to want to come first, Aquarius tends to hate being checked on, and a quiet sense of being second can start to look like jealousy. Agreeing which nights belong to the two of you settles more than a general talk about trust.

Affection can cool in a similar way. This pair often starts as friends, and a relationship built on debate and shared projects can drift toward feeling like roommates. Venus was in Capricorn on 29.8% of sampled Aquarius Sun dates, its most common sign there, so the 'airy' partner often shows love through reliability and effort. That kind of Capricorn Venus is easy to miss if you're waiting for a grand gesture. Say what counts as romance for each of you, in specifics. If an argument leaves one of you feeling uncared for, ask what reassurance each of you needs; astrology looks for that in the way two Moon signs fit more than in either Sun.

If sex has become routine, ask what each of you misses. Mars was in Aries on 11.7% of sampled Aquarius Sun dates, one of its three most common signs there. With an Aries Mars, an Aquarius may be far more direct about desire than the detached reputation suggests.

One friend with a crowd, one who wants the two of you

Plenty of people meet this pairing as friends first, and an Aries and Aquarius friendship is often excellent. You can argue about movies and politics for hours, as long as both of you still want the conversation. The friction tends to be social. Aquarius often collects a wide circle, while Aries may prefer a few people and a direct line to each.

So protect the one-to-one. If every plan turns into a group plan, the Aries friend can start to feel like one of many. When you make a plan, say whether it's just the two of you or open to the group, and the group nights stop feeling like a demotion.

Different values, or different ways of arguing?

When a debate keeps turning personal, it's tempting to decide you have different values. Sometimes that's true. Just as often you have different ways of arguing for similar ones, and the sextile between your Suns can't tell you which. Aries and Gemini is the other fire and air sextile, and Gemini is mutable where Aquarius is fixed, so astrology expects a Gemini to let go of a position sooner. Saturn, Aquarius's traditional ruler, also rules Capricorn, one of Aries' two hardest matches, and the Aries compatibility page reads both Saturn signs against Mars.

When one person's Mercury sits on the other's Mars, astrologers expect words to land harder than they were meant, and it can run in either direction. Astrology offers that as a reading to test against your own experience. Overlaying the two charts shows every Mercury and Mars contact between you, built from both of your birth charts.

The quiet partner might be the Aries

At that same coffee table, say the Aries has Mercury in Pisces and the Aquarius has Mercury in Aquarius, a pairing found in 18.2% of modeled pairs. The more common setup, both Mercury signs matching the Suns, would make for an open sparring match where both say what annoyed them.

This couple is different. Forty minutes in, the Aries has gone quiet and the Aquarius assumes the point was won. They may not disagree about values at all; both might want the same downtown. If the Aries can say 'that last comment felt personal', the Aquarius can ask which one, deal with it, and then go back to the cars.

Aries and Aquarius questions