Skip to content
Genastro

Sign compatibility

Leo and Aries

How the Sun in Aries and the Sun in Leo relate by element, modality and position, and what two traditions say about the pairing. It does not predict how two people get on.

  • Aries
  • Leo
Elements
Both fire
Modalities
Cardinal and fixed
Angle between the signs
Trine (120°), counted by sign

How common is each Sun sign

  • Sun in Aries8.14%of 2,000,000 simulated births, 5th rarest of 12
  • Sun in Leo8.78%of 2,000,000 simulated births, the most common of 12

There is no simulated figure for the pair itself. These are the shares of each Sun sign on its own.

In plain words

  • Sun in Aries

    In Aries, the Sun expresses itself in a direct, quick-starting way.

  • Sun in Leo

    In Leo, the Sun expresses itself in a warm, open way.

Generic readingA generic description in the style of modern astrology, the same for everyone who has this placement. Not a prediction.

Do you have this?

Is your Sun in Aries or Leo?

Enter your birth details. The same engine as the full calculator computes your chart and checks it against this page. Only your Sun is compared, so a birth time matters only on a day when the Sun changes sign.

Date of birth
Exact time of birth24-hour

Pick the nearest city or town from the list.

What is being compared in Leo and Aries?

  1. What is compared

    Two Sun signs

    This page sets the Sun in Aries against the Sun in Leo: each has an element, a modality and a ruler. No tradition on this site claims to predict how two people get on.

  2. How the signs relate

    Trine (120°)

    Both are fire. Cardinal and fixed: one opens a season, the other sits mid-season. Aries and Leo are 4 signs apart, a trine (120°) counted by sign. Hellenistic astrologers hold that signs in trine see each other.

  3. How common it is

    No pair figure

    There is no simulated figure for the pair itself. These are the shares of each Sun sign on its own. Sun in Aries: 8.14% of simulated births, about 1 in 12; 5th rarest of 12. Sun in Leo: 8.78% of simulated births, about 1 in 11; the most common of 12.

How do Leo and Aries relate?

Leo

Fixed fire

Leo is a positive (yang) sign: fire and air signs are positive, earth and water signs negative.

Aries

Cardinal fire

Aries is a positive (yang) sign: fire and air signs are positive, earth and water signs negative.

Both are fire. Cardinal and fixed: one opens a season, the other sits mid-season. Aries and Leo are 4 signs apart, a trine (120°) counted by sign. Hellenistic astrologers hold that signs in trine see each other.

How common is each of the two Sun signs?

How common is each Sun sign?

An even split of the 12 signsBars start at zero.Share of simulated births with the Sun in each of the 12 signs. Share of 2,000,000 simulated births (1950–2024), tropical zodiac.

When is the Sun in Aries and in Leo?

Sun in Aries, last pass
ended 20 Apr 2026
20 March 2026, 14:45 UTC to 20 April 2026, 01:39 UTC (about 30 days)
Sun in Aries, next pass
from 20 Mar 2027
20 March 2027, 20:24 UTC to 20 April 2027, 07:17 UTC (about 30 days)
Sun in Leo, last pass
ended 23 Aug 2026
22 July 2026, 19:13 UTC to 23 August 2026, 02:18 UTC (about 31 days)
Sun in Leo, next pass
from 23 Jul 2027
23 July 2027, 01:04 UTC to 23 August 2027, 08:14 UTC (about 31 days)

Last, current and next passes

  1. Sun in Aries

    20 Mar 2026 → 20 Apr 2026 · about 30 days

    last pass

  2. Sun in Leo

    22 Jul 2026 → 23 Aug 2026 · about 31 days

    last pass

  3. Sun in Aries

    20 Mar 2027 → 20 Apr 2027 · about 30 days

    next pass

  4. Sun in Leo

    23 Jul 2027 → 23 Aug 2027 · about 31 days

    next pass

  • Each year the Sun is in Aries from about 19–21 March to 19–21 April (UTC dates, 1900–2050).
  • Each year the Sun is in Leo from about 22–24 July to 22–24 August (UTC dates, 1900–2050).

As of 16 October 2026, 13:56 UTC. Dates are UTC, tropical zodiac, read from the ephemeris's table of sign entries. This page refreshes hourly.

What do different traditions say about Leo and Aries?

AI-written text that an AI research review then checked against sources. No person has reviewed it; the notes and references behind each check are under its label.

Hellenistic

The astrology of the Greek-speaking Mediterranean from roughly the 1st century BCE to the 7th century CE, as recorded by authors such as Vettius Valens, Dorotheus and Ptolemy.

AI-written, checked by AI

1 Oct 2026

Aries and Leo are four signs apart, a trine, and both are masculine fire signs, so Hellenistic astrologers count them as in easy contact. Aries is cardinal and Leo fixed. Mars rules Aries and the Sun rules Leo, so the signs share no ruler. The lords stand unevenly: the Sun is exalted in Aries, its sign of high honor, while Mars has no dignity in Leo. The Sun belongs to the day team and Mars to the night team under sect, the tradition's sorting of planets by day and night charts. A chart's own type, which depends on birth time, decides how much that split matters. Hellenistic sources define these configurations inside one chart, so comparing two people's signs this way is an extension this page makes. Read it as a structure, not an outcome.

Sources

  • Ptolemy, Tetrabiblos, Book I
  • Chris Brennan, Hellenistic Astrology: The Study of Fate and Fortune (2017)

What was checked

An AI research review checked this text against sources on 1 Oct 2026. No person has reviewed it.

Reviewer's notes

Aspects/aversion by sign (Ptolemy I.13, I.16), dignities, genders and modalities confirmed; the block already says it applies a one-chart doctrine to two people's signs as an extension, which is this page's choice and not an ancient claim.

Sources consulted

Modern psychological

The 20th-century Western approach shaped by Alan Leo, Dane Rudhyar and Liz Greene, drawing on Jungian psychology.

AI-written, checked by AI

1 Oct 2026

Aries and Leo are four signs apart, a trine, and share the fire element. Aries is cardinal and Leo fixed. When two charts are compared sign to sign, modern psychological astrology reads a shared element as a common style, and associates fire with initiative, warmth and enthusiasm. It associates cardinal signs with starting and fixed signs with sustaining, so the modalities here differ. Hellenistic astrologers give Mars the rule of Aries and the Sun the rule of Leo. They also place the Sun's exaltation in Aries, so the Sun holds rank in both signs. They read the trine as a configuration of ease between signs of one element and make no personality claim from it.

Sources

  • Liz Greene, Relating: An Astrological Guide to Living with Others on a Small Planet (1977)
  • Stephen Arroyo, Astrology, Psychology, and the Four Elements (1975)
  • Chris Brennan, Hellenistic Astrology: The Study of Fate and Fortune (2017)

What was checked

An AI research review checked this text against sources on 1 Oct 2026. No person has reviewed it.

Reviewer's notes

Verified: Aries is 4 signs from Leo (trine), both fire, cardinal versus fixed; Mars rules Aries, the Sun rules Leo and is exalted in Aries (Ptolemy). Added the rulership and exaltation facts to reach 110 words. Interpretive keywords are consistent with the sign keywords in the project reference data but were not checked against the books' own text; no claim is made about how a pair will fare.

Sources consulted

Where they differ

Hellenistic astrology reasons from technique: essential dignity, sect and configuration by sign. Modern psychological astrology reasons from element, modality and the planet's function. They start from different questions, so the same placement can read differently, and neither reading is the verdict. Both use the tropical zodiac here.

Where next?