Mars sign calculator
Find the zodiac sign Mars was in when you were born. Mars is tied to action and conflict, and it usually stays in a sign for about six or seven weeks.
What this sign means
Mars is the planet older books associate with action, anger, courage, and the way a person goes after a goal. The sign of Mars is a style of doing, in that tradition. It is not a measure of temper, and it does not say what conflict you will have. Mars moves more slowly than Mercury or Venus, so a whole cohort of birthdays can share a Mars sign. They do not share a fate.
Mars sign in each sign
Aries
Mars in Aries is Mars in its traditional own sign. The books describe action that starts at once and would rather move than negotiate. It is a caption for a six-week stretch of sky, not a verdict on a person. Aries sign
Taurus
Mars in Taurus is described as effort that is slow to start and then very hard to stop. The bull is the picture. Mars will leave the sign on a date the calculator can name for your year. Taurus sign
Gemini
Mars in Gemini is the textbook split effort: two projects, a lot of talk, and a quick change of tool. The twins are the symbol. Retrograde motion can bring Mars back into Gemini after it has left. Gemini sign
Cancer
Mars in Cancer is described as action taken to protect, and anger that shows up as withdrawal. The crab is the picture. The birth date places Mars. It does not schedule a fight. Cancer sign
Leo
Mars in Leo is the old note about visible effort, pride in the work, and a dislike of being overlooked. The lion is the symbol. Most of a seven-week stay does not need a birth time. Leo sign
Virgo
Mars in Virgo is described as energy spent on the detail and on fixing what is inefficient. The tradition says this Mars would rather improve a process than make a speech. It is still just a planet in a sign. Virgo sign
Libra
Mars in Libra is the textbook uneasy fighter: action that wants a fair rule and stalls when the fight feels ugly. The scales are the picture. A changeover day is the one that needs the clock. Libra sign
Scorpio
Mars in Scorpio is the older own sign of Mars, before modern books gave that role to Pluto. The description is private, concentrated effort. The calculator is finding Mars, not Pluto. Scorpio sign
Sagittarius
Mars in Sagittarius is described as action aimed at a far target, blunt and restless. The archer is the symbol. People born weeks apart can share it, because Mars moves slowly. Sagittarius sign
Capricorn
Mars in Capricorn is the tradition's patient drive, effort that accepts a delay if the structure is sound. The sea goat is the drawing. The sign is a calculated place, and the sentence is the gloss. Capricorn sign
Aquarius
Mars in Aquarius is described as action taken for a group or an idea, with less interest in a personal contest. The water bearer is the picture. Retrograde weeks can lengthen the stay. Aquarius sign
Pisces
Mars in Pisces is the old indirect push: effort that works through feeling and imagination, and that loses force when it has to be harsh. The fish are the symbol. Check the tool if Mars changed sign that day. Pisces sign
How it is calculated
Astronomy Engine computes the ecliptic longitude of Mars. GeoNames turns the birth city into coordinates and a time zone, with the daylight saving rule of that year. Mars usually spends about six or seven weeks in a sign, and longer when it is retrograde and retraces the same degrees. A changeover day needs the birth time. A day in the middle of the stay does not. The library's public goal is about one arcminute for dates in the centuries around now. A wrong birthplace moves the clock by hours, which matters only on the changeover.
Positions use Astronomy Engine. Cities use GeoNames (CC BY 4.0). Read the limits on how we calculate.
Questions
What is a Mars sign?
It is the sign Mars occupied at birth. Tradition reads it as a style of action and conflict. The result is the sign. The paragraphs are the textbook notes.
Why do so many birthdays share a Mars sign?
Mars takes about six or seven weeks to cross a sign, and longer while retrograde. A Sun sign changes in about a month, so the two do not stay in step.
Does the birth time matter?
Only on a day when Mars changes sign, or when you are close enough to that day that the clock could cross it. The calculator flags the split instead of hiding it.
Is Mars the same as my rising sign?
No. Mars is a planet. The rising sign is the horizon. They use different inputs, and only the rising sign always requires a birth time.
Where do the positions come from?
Astronomy Engine calculates them. GeoNames supplies the city data under the CC BY 4.0 license. Both are linked on the how we calculate page.