2027 Forecast

Synastry aspect · 90° · orb 8°

Ascendant Square Mars Synastry

Ascendant square Mars in synastry means one partner's Ascendant sits about 90° from the other's Mars (orb ±8°), an angle read as friction. It turns up in 8.88% of couples born within five years of each other.

Each side on its own first: the rising sign, Mars in a birth chart and birth chart calculator.

In couples
8.88% about 1 in 11
Either way round
17.02% both ways: 0.74%
Angle
90° 3 signs apart · orb ±8°
Birth time
±30 min before it breaks

Simulation of 3 million couples, NASA JPL DE440.

The same aspect with one of these planets: Ascendant square Lilith, Ascendant square Neptune, Ascendant square Chiron, Ascendant square Pluto, Mars square Moon, Jupiter square Mars, Mars square Neptune and Lilith square Mars.

Ascendant Square Mars Synastry: Meaning and How Common It Is

Checked against chance

How common is Ascendant square Mars in synastry?

Ascendant square Mars, counted three ways
Ascendant square Mars, counted three ways Ascendant square Mars, counted three ways: Couples ≤ 5 yrs apart 8.88%, Any two people, 1940–2010 8.89%, Planets spread evenly 8.89%. Couples ≤ 5 yrs apartCouples ≤ 5 yrs apart: 8.88%8.88%Any two people, 1940–2010Any two people, 1940–2010: 8.89%8.89%Planets spread evenlyPlanets spread evenly: 8.89%8.89%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com Couples ≤ 5 yrs apartCouples ≤ 5 yrs apart: 8.88%8.88%Any two people, 1940–2010Any two people, 1940–2010: 8.89%8.89%Planets spread evenlyPlanets spread evenly: 8.89%8.89%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com

Born the same year or 39 years apart, couples land between 8.81% and 8.98%.

How the odds are calculated →

By sign

Which signs make Ascendant square Mars

Sign pairs that make Ascendant square Mars (shaded)
Sign pairs that make Ascendant square Mars (shaded) Ascendant in Aries: Mars in Cancer or Capricorn; Ascendant in Taurus: Mars in Leo or Aquarius; Ascendant in Gemini: Mars in Virgo or Pisces; Ascendant in Cancer: Mars in Aries or Libra; Ascendant in Leo: Mars in Taurus or Scorpio; Ascendant in Virgo: Mars in Gemini or Sagittarius; Ascendant in Libra: Mars in Cancer or Capricorn; Ascendant in Scorpio: Mars in Leo or Aquarius; Ascendant in Sagittarius: Mars in Virgo or Pisces; Ascendant in Capricorn: Mars in Aries or Libra; Ascendant in Aquarius: Mars in Taurus or Scorpio; Ascendant in Pisces: Mars in Gemini or Sagittarius. Mars’ sign →Ascendant’s sign →AriTauGemCanLeoVirLibScoSagCapAquPisAriAscendant in Aries, Mars in AriesAscendant in Aries, Mars in TaurusAscendant in Aries, Mars in GeminiAscendant in Aries, Mars in Cancer — forms itAscendant in Aries, Mars in LeoAscendant in Aries, Mars in VirgoAscendant in Aries, Mars in LibraAscendant in Aries, Mars in ScorpioAscendant in Aries, Mars in SagittariusAscendant in Aries, Mars in Capricorn — forms itAscendant in Aries, Mars in AquariusAscendant in Aries, Mars in PiscesTauAscendant in Taurus, Mars in AriesAscendant in Taurus, Mars in TaurusAscendant in Taurus, Mars in GeminiAscendant in Taurus, Mars in CancerAscendant in Taurus, Mars in Leo — forms itAscendant in Taurus, Mars in VirgoAscendant in Taurus, Mars in LibraAscendant in Taurus, Mars in ScorpioAscendant in Taurus, Mars in SagittariusAscendant in Taurus, Mars in CapricornAscendant in Taurus, Mars in Aquarius — forms itAscendant in Taurus, Mars in PiscesGemAscendant in Gemini, Mars in AriesAscendant in Gemini, Mars in TaurusAscendant in Gemini, Mars in GeminiAscendant in Gemini, Mars in CancerAscendant in Gemini, Mars in LeoAscendant in Gemini, Mars in Virgo — forms itAscendant in Gemini, Mars in LibraAscendant in Gemini, Mars in ScorpioAscendant in Gemini, Mars in SagittariusAscendant in Gemini, Mars in CapricornAscendant in Gemini, Mars in AquariusAscendant in Gemini, Mars in Pisces — forms itCanAscendant in Cancer, Mars in Aries — forms itAscendant in Cancer, Mars in TaurusAscendant in Cancer, Mars in GeminiAscendant in Cancer, Mars in CancerAscendant in Cancer, Mars in LeoAscendant in Cancer, Mars in VirgoAscendant in Cancer, Mars in Libra — forms itAscendant in Cancer, Mars in ScorpioAscendant in Cancer, Mars in SagittariusAscendant in Cancer, Mars in CapricornAscendant in Cancer, Mars in AquariusAscendant in Cancer, Mars in PiscesLeoAscendant in Leo, Mars in AriesAscendant in Leo, Mars in Taurus — forms itAscendant in Leo, Mars in GeminiAscendant in Leo, Mars in CancerAscendant in Leo, Mars in LeoAscendant in Leo, Mars in VirgoAscendant in Leo, Mars in LibraAscendant in Leo, Mars in Scorpio — forms itAscendant in Leo, Mars in SagittariusAscendant in Leo, Mars in CapricornAscendant in Leo, Mars in AquariusAscendant in Leo, Mars in PiscesVirAscendant in Virgo, Mars in AriesAscendant in Virgo, Mars in TaurusAscendant in Virgo, Mars in Gemini — forms itAscendant in Virgo, Mars in CancerAscendant in Virgo, Mars in LeoAscendant in Virgo, Mars in VirgoAscendant in Virgo, Mars in LibraAscendant in Virgo, Mars in ScorpioAscendant in Virgo, Mars in Sagittarius — forms itAscendant in Virgo, Mars in CapricornAscendant in Virgo, Mars in AquariusAscendant in Virgo, Mars in PiscesLibAscendant in Libra, Mars in AriesAscendant in Libra, Mars in TaurusAscendant in Libra, Mars in GeminiAscendant in Libra, Mars in Cancer — forms itAscendant in Libra, Mars in LeoAscendant in Libra, Mars in VirgoAscendant in Libra, Mars in LibraAscendant in Libra, Mars in ScorpioAscendant in Libra, Mars in SagittariusAscendant in Libra, Mars in Capricorn — forms itAscendant in Libra, Mars in AquariusAscendant in Libra, Mars in PiscesScoAscendant in Scorpio, Mars in AriesAscendant in Scorpio, Mars in TaurusAscendant in Scorpio, Mars in GeminiAscendant in Scorpio, Mars in CancerAscendant in Scorpio, Mars in Leo — forms itAscendant in Scorpio, Mars in VirgoAscendant in Scorpio, Mars in LibraAscendant in Scorpio, Mars in ScorpioAscendant in Scorpio, Mars in SagittariusAscendant in Scorpio, Mars in CapricornAscendant in Scorpio, Mars in Aquarius — forms itAscendant in Scorpio, Mars in PiscesSagAscendant in Sagittarius, Mars in AriesAscendant in Sagittarius, Mars in TaurusAscendant in Sagittarius, Mars in GeminiAscendant in Sagittarius, Mars in CancerAscendant in Sagittarius, Mars in LeoAscendant in Sagittarius, Mars in Virgo — forms itAscendant in Sagittarius, Mars in LibraAscendant in Sagittarius, Mars in ScorpioAscendant in Sagittarius, Mars in SagittariusAscendant in Sagittarius, Mars in CapricornAscendant in Sagittarius, Mars in AquariusAscendant in Sagittarius, Mars in Pisces — forms itCapAscendant in Capricorn, Mars in Aries — forms itAscendant in Capricorn, Mars in TaurusAscendant in Capricorn, Mars in GeminiAscendant in Capricorn, Mars in CancerAscendant in Capricorn, Mars in LeoAscendant in Capricorn, Mars in VirgoAscendant in Capricorn, Mars in Libra — forms itAscendant in Capricorn, Mars in ScorpioAscendant in Capricorn, Mars in SagittariusAscendant in Capricorn, Mars in CapricornAscendant in Capricorn, Mars in AquariusAscendant in Capricorn, Mars in PiscesAquAscendant in Aquarius, Mars in AriesAscendant in Aquarius, Mars in Taurus — forms itAscendant in Aquarius, Mars in GeminiAscendant in Aquarius, Mars in CancerAscendant in Aquarius, Mars in LeoAscendant in Aquarius, Mars in VirgoAscendant in Aquarius, Mars in LibraAscendant in Aquarius, Mars in Scorpio — forms itAscendant in Aquarius, Mars in SagittariusAscendant in Aquarius, Mars in CapricornAscendant in Aquarius, Mars in AquariusAscendant in Aquarius, Mars in PiscesPisAscendant in Pisces, Mars in AriesAscendant in Pisces, Mars in TaurusAscendant in Pisces, Mars in Gemini — forms itAscendant in Pisces, Mars in CancerAscendant in Pisces, Mars in LeoAscendant in Pisces, Mars in VirgoAscendant in Pisces, Mars in LibraAscendant in Pisces, Mars in ScorpioAscendant in Pisces, Mars in Sagittarius — forms itAscendant in Pisces, Mars in CapricornAscendant in Pisces, Mars in AquariusAscendant in Pisces, Mars in PiscesSource: tropical zodiac, counted by signastrohot.com

To check it by degree: the Ascendant at 10° Taurus makes the square with Mars anywhere from 2° to 18° of Leo or Aquarius — the 90° angle give or take 8°. The grid goes by sign, but the square also forms across a sign line: the Ascendant at 1° Taurus and Mars at 29° Cancer are 88° apart, a sextile by sign.

Between two people

What does Ascendant square Mars mean in synastry?

To the ascendant person, the Mars person's energy feels like interference or aggression; they may feel criticized for how they look or behave. Arguments start quickly and physically — slammed doors, raised voices — and can be as quick to flare as the attraction was.

The usual mistake

Where does Ascendant square Mars usually go wrong?

Irritation gets read as chemistry. Fights flare over manner and appearance, cool quickly, and leave a residue that builds because nobody treats them as real conflict.

Over time

How Ascendant square Mars plays out over time

  1. Early on. Sparks and irritation from the first meeting: the Mars person comments on how the other walks, talks or dresses, and the ascendant person bristles.
  2. Under pressure. Small provocations escalate quickly into raised voices. Afterward, both are puzzled by how fast it happened.
  3. Years in. The contact calms when the Mars person channels the push into shared physical activity and stops critiquing the ascendant person's manner.

If the birth time is wrong

This aspect survives about 30 minutes of birth-time error

15° an hour for the Ascendant, the faster point.
8° orb either side of 90°.
Fragile Needs an exact birth time.

How far a wrong birth time moves the ascendant and houses →

Ascendant and Mars at other angles

At any angle: One person's Mars — drive, desire and temper — lands on the other's ascendant, their body and first-impression self. The effect is energizing and physical: the Mars person pushes, provokes or pursues, and the ascendant person feels it directly.

The square among the Ascendant–Mars angles, % of couples
The square among the Ascendant–Mars angles, % of couples The square among the Ascendant–Mars angles, % of couples: Sextile 60° 6.79%, Square 90° 8.88%, Trine 120° 8.76%, Quincunx 150° 3.24%, Opposition 180° 4.31%. Sextile 60°Sextile 60°: 6.79%6.79%Square 90°Square 90°: 8.88%8.88%Trine 120°Trine 120°: 8.76%8.76%Quincunx 150°Quincunx 150°: 3.24%3.24%Opposition 180°Opposition 180°: 4.31%4.31%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com Sextile 60°Sextile 60°: 6.79%6.79%Square 90°Square 90°: 8.88%8.88%Trine 120°Trine 120°: 8.76%8.76%Quincunx 150°Quincunx 150°: 3.24%3.24%Opposition 180°Opposition 180°: 4.31%4.31%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com
Opposition 180° · 4.31% of couples Trine 120° · 8.76% of couples Sextile 60° · 6.79% of couples Quincunx 150° · 3.24% of couples

Next to Ascendant square Mars in our list of 382, which runs from the most asked-about down.

Lilith square Moon 90° · 8.91% of couples Lilith trine Moon 120° · 8.96% of couples Moon square Node 90° · 8.89% of couples Moon sextile Pluto 60° · 6.7% of couples

Cite this page

AstroHot. “Ascendant Square Mars Synastry: Meaning and How Common It Is.” Accessed October 28, 2026. https://astrohot.com/synastry/aspects/ascendant-square-mars/

For Wikipedia {{cite web |title=Ascendant Square Mars Synastry: Meaning and How Common It Is |url=https://astrohot.com/synastry/aspects/ascendant-square-mars/ |website=AstroHot |access-date=2026-10-28}}