Mercury Sign Calculator — Your Mercury Sign

Your Mercury sign is the tropical zodiac sign Mercury occupied at the moment you were born — the planet of mind, speech and commerce, so the sign shows how you think, speak and learn. Enter your birth date, time and place to get it with the exact degree and the house it sits in.

In traditional astrology Mercury is the planet of mind, speech and commerce. The sign it occupied at birth shapes how those themes express: the sign's element (fire, earth, air or water) and modality (cardinal, fixed or mutable) colour the planet's action, and the house shows the area of life it acts in.

Often not. The tropical zodiac used here measures signs from the equinoxes; the sidereal zodiac used by Vedic astrology measures against the fixed stars, applying the ayanamsa — currently about 24 degrees. Because the two zodiacs start from different points, your tropical Mercury sign and your Vedic placement can differ by about a sign — both systems are internally consistent, they just answer in different coordinates.

For the sign itself, no — Mercury moves slowly enough that its sign rarely changes within a day of birth, and only a birth very close to a sign boundary is affected. The house the planet occupies, however, does need the exact time: houses turn with the ascendant, which changes sign roughly every two hours.

The planet positions themselves barely change with location, but the house division is local: the ascendant is the sign rising on the eastern horizon at your exact birth place, and the whole-sign houses are counted from it. The place also fixes your timezone, which determines the universal time the positions are computed for.