What the Zodiac Venus Sign Calculator does
This calculator finds your Venus sign - the zodiac sign Venus occupied when you were born - from your birth date, by computing Venus's actual position as seen from Earth. It also tells you whether Venus was retrograde, the dates it entered and left that sign, and whether your birthday was one of the rare days when Venus changed sign, which is the only case where the birth time matters.
Venus does not follow the neat month-long pattern of the Sun. It never strays more than about 47 degrees from the Sun, so your Venus sign is always your Sun sign or one of the two signs either side of it, and roughly every 19 months it slows, turns retrograde and can stay in one sign for four months. That is why a fixed table of dates cannot give the right answer, and why the position is calculated here instead, in your browser.
How to use it
- Enter the birth date. A time is optional; if you have one, add it with the birthplace time zone.
- Choose Western (tropical) or Vedic (sidereal) - the sidereal sign is often one sign earlier.
- Read the headline sign and degree. A green note means Venus stayed in that sign all day, so no birth time is needed.
- If Venus was retrograde, the note gives the dates of that retrograde period; the stats show when Venus entered your Venus sign and when it left.
- The table lists Venus's sign periods for several months either side of your birth, which you can download.
Reading the results
The degree shows where in the sign Venus was. Venus moves up to about 1.25 degrees a day, so even at 29 degrees it was usually still in that sign at the end of the day.
A retrograde Venus is an apparent backward motion that happens when Earth and Venus are on the same side of the Sun. Around 7% of the time Venus is retrograde (about 42 days in every 584), so it is uncommon but not rare.
The entry and exit dates explain why two people born a few weeks apart can share a Venus sign, and why two people born a day apart usually do too.
The descriptions are astrological tradition, not science: conventions about love and values associated with each sign, labelled as such.
Worked example: a retrograde Venus in 1999
Born 20 August 1999 in New York, time unknown. At noon local time Venus's apparent longitude is 146.93 degrees: 146.93 - 120 = 26.93, so 26 deg 55' Leo.
Its daily motion is -0.62 degrees, so it was retrograde. The calculation finds the station retrograde on 29 July 1999 and the station direct on 10 September 1999.
Because of that loop, Venus had already left Leo for Virgo and came back: it re-entered Leo on 15 August 1999 and left again on 7 October. The birth day is well inside that period, so the missing time does not matter.
Formulas and scoring rules
- Venus's position
Kepler orbit of Venus (Schlyter elements of date) minus Earth's orbit (Meeus solar theory), corrected for light-time, aberration and nutationAbout 1 to 2 arc-minutes against JPL Horizons.- Sign
sign = floor(longitude / 30), 0 = Aries- Retrograde
daily motion = (lambda(t + 0.05 d) - lambda(t - 0.05 d)) / 0.1 d; retrograde when negative- Ingress dates
longitude sampled every 12 hours; a change of sign is located by bisection to under a second- Sidereal
lambda_sid = lambda - Lahiri ayanamsa
Limitations: what the result does not prove
- Ingress times are accurate to a few minutes, limited by the 1 to 2 arc-minute accuracy of the orbit model; on a change day with an unknown time the page gives both signs rather than guessing.
- Only dates from 1900 to 2100 are supported.
- The sidereal option uses the Lahiri ayanamsa only.
- What a Venus sign is said to mean for love and relationships is astrological tradition, not something any study has shown.
Privacy: where your data goes
Everything you paste, type or drop is processed in this browser tab. It is not uploaded, logged, stored or sent to analytics. Session recording and tag-manager scripts are switched off on this page.
Standards and sources
- NASA JPL Horizons - solar system ephemeris used to check positions - checked 19 Sep 2026
- Paul Schlyter - How to compute planetary positions
- NASA Science - Venus facts
Frequently asked questions
How do I find my Venus sign?
Enter your birth date. The tool computes where Venus was in the zodiac that day and names the sign and degree. You only need the time if the page says Venus changed sign on your birthday.
Can I find my Venus sign without a birth time?
Almost always. Venus moves at most about 1.25 degrees a day and spends weeks or months in each sign, so on the great majority of dates it stays in one sign all day. The page checks the whole day and tells you if yours is an exception.
Why is my Venus sign different from my Sun sign?
Venus orbits closer to the Sun than Earth does, so from Earth it appears up to about 47 degrees either side of the Sun. That puts your Venus sign in your Sun sign or within two signs of it, depending on where Venus was in its orbit.
What does it mean if Venus was retrograde when I was born?
Astronomically, Venus appeared to move backwards because Earth was overtaking it on the inside of its orbit. In astrological tradition a retrograde Venus is read as love expressed more cautiously; that reading is a convention, not a finding.
Is the Vedic Venus sign different?
Often. The sidereal zodiac used in Indian astrology is about 24 degrees behind the tropical one today, so unless Venus was late in a sign, the sidereal Venus sign is the previous sign. Switch the zodiac option to compare.
How long does Venus stay in one sign?
Usually 23 to 26 days. When Venus is retrograde it can stay in or return to a sign for around four months, which is why the sign periods around a retrograde look irregular in the table.
Last reviewed by the A2Z.Tools team against the sources listed above.
