# Mars Sign Calculator

Your Mars sign is the zodiac sign Mars was in when you were born. It describes how you act, compete, desire and get angry. Enter your birth date to find it, and add your birth time and place for the exact degree and house.

Use the free calculator: https://www.selfgazer.com/tools/mars-sign-calculator

## What Your Mars Sign Describes

Mars describes drive: how you go after what you want, how you handle conflict, what makes you angry and how you use your physical energy. An Aries Mars may act first and think later; a Libra Mars may weigh every side before moving and fight hardest for fairness. Read more about [Mars in astrology](https://www.selfgazer.com/blog/mars-astrology-meaning).

## How the Mars Sign Is Calculated

Mars takes about two years to circle the zodiac and spends about six to seven weeks in a sign, 55 days on average from 1900 to 2060. Roughly every 26 months it turns retrograde for ten to eleven weeks, which can hold it in one sign for months: the longest stay in that range lasted 235 days, in Virgo.

Unlike Mercury and Venus, Mars can sit in any sign relative to your Sun. The calculator finds its apparent geocentric longitude at your birth instant, and whether it was retrograde.

## Why Birth Time Matters

Between 1900 and 2060, Mars changed sign on about 2% of days, roughly 1 day in 53. If your birthday is one of them, the sign depends on the hour you were born. Without a time, the calculator checks every hour of your birth date (in every time zone, if you leave out the place) and shows each sign Mars could have held.

With your birth time and place, the result also gives the exact degree and the house, the area of life where this placement works.

## How Accurate Is It?

Positions come from Selfgazer's astrology engine, the same one that draws the chart in your astro room: VSOP87 planetary theory through Astronomy Engine, with Chiron from Swiss Ephemeris tables. Tested against the Swiss Ephemeris, planets agree to within half an arcminute and house cusps to within a tenth of an arcminute. Your local birth time is converted with your birthplace's historical time zone rules, including past daylight saving changes. Everything is calculated in your browser, and nothing you enter is stored.

## Mars Through the Signs

Average days Mars spends in each sign per pass, including retrograde loops, from 1900 to 2060. Mars moves slowest through Leo and Virgo, where its orbit carries it farthest from the Sun, and fastest through Aquarius and Pisces.

- Average stay per sign: 55 days
- Longest single stay: 8 months in Virgo (2011-11-11 to 2012-07-03)
- Days with a sign change: 1.9% (about 1 in 53)
- Sign changes counted: 1110, 1900 to 2060

| Sign | Average stay per pass | Passes |
| --- | --- | --- |
| Aries | 47 days | 88 |
| Taurus | 52 days | 88 |
| Gemini | 56 days | 90 |
| Cancer | 61 days | 91 |
| Leo | 66 days | 91 |
| Virgo | 66 days | 92 |
| Libra | 61 days | 91 |
| Scorpio | 57 days | 89 |
| Sagittarius | 53 days | 87 |
| Capricorn | 48 days | 87 |
| Aquarius | 46 days | 88 |
| Pisces | 46 days | 87 |

### Sign Dates in 2026 and 2027

| Sign | From | Until | Note |
| --- | --- | --- | --- |
| Capricorn | Before Jan 1, 2026 | Jan 23, 2026, 09:16 UTC |  |
| Aquarius | Jan 23, 2026, 09:16 UTC | Mar 2, 2026, 14:15 UTC |  |
| Pisces | Mar 2, 2026, 14:15 UTC | Apr 9, 2026, 19:36 UTC |  |
| Aries | Apr 9, 2026, 19:36 UTC | May 18, 2026, 22:26 UTC |  |
| Taurus | May 18, 2026, 22:26 UTC | Jun 28, 2026, 19:29 UTC |  |
| Gemini | Jun 28, 2026, 19:29 UTC | Aug 11, 2026, 08:31 UTC |  |
| Cancer | Aug 11, 2026, 08:31 UTC | Sep 28, 2026, 02:49 UTC |  |
| Leo | Sep 28, 2026, 02:49 UTC | Nov 25, 2026, 23:37 UTC |  |
| Virgo | Nov 25, 2026, 23:37 UTC | Feb 21, 2027, 14:15 UTC |  |
| Leo | Feb 21, 2027, 14:15 UTC | May 14, 2027, 14:47 UTC | Retrograde |
| Virgo | May 14, 2027, 14:47 UTC | Jul 15, 2027, 05:40 UTC |  |
| Libra | Jul 15, 2027, 05:40 UTC | Sep 2, 2027, 01:51 UTC |  |
| Scorpio | Sep 2, 2027, 01:51 UTC | Oct 15, 2027, 23:13 UTC |  |
| Sagittarius | Oct 15, 2027, 23:13 UTC | Nov 25, 2027, 18:37 UTC |  |
| Capricorn | Nov 25, 2027, 18:37 UTC | After Jan 1, 2028 |  |

## Questions

### What Is My Mars Sign?

Your Mars sign is the zodiac sign Mars occupied at your birth. Enter your birth date above to find it. Mars changes sign rarely enough that the date settles it for almost everyone.

### What Does My Mars Sign Mean?

It describes how you act on desire and handle friction: your pace, your temper, your courage and how you compete. In relationships it also describes what attracts you physically and how you pursue it.

### Can I Find My Mars Sign Without a Birth Time?

Usually. Mars changed sign on about 2% of days between 1900 and 2060, roughly 1 day in 53. On those days the calculator shows both possible signs until you add your birth time and place.

### What if Mars Was Retrograde When I Was Born?

Mars is retrograde about 9% of the time. Astrologers often read it as drive that turns inward first: action that is considered, reworked or held back until it feels right. The result tells you whether your Mars was retrograde.

### What Does the House of My Mars Mean?

The sign describes how Mars works; the house describes where in life it works: home, work, relationships, friendships and so on. Houses need your birth time and place, because they turn with the Earth once a day. Add both and the calculator gives the house in Placidus or Whole Sign houses.

Source: [Selfgazer Mars Sign Calculator](https://www.selfgazer.com/tools/mars-sign-calculator). Free to cite with a link to the source page.