Free, with no e-mail address. Birth time and place come next, and both can be skipped.
Enter your birth date, exact birth time and birthplace, and this free calculator turns the sky back to that minute and names the sign that was rising on the eastern horizon: your Ascendant. It runs in your browser and needs no e-mail. Below, we explain what the rising sign means and how to get a result you can rely on.
The rising sign, or Ascendant, is the sign of the zodiac that was coming up over the eastern horizon at the minute and in the place you were born. As the Earth turns, the whole zodiac passes over that horizon once a day, one sign after another, so the rising sign changes on average about every two hours. Some signs take longer to rise and others clear the horizon quickly. Which ones depends on the latitude, and the difference grows the further from the equator you were born.
In a chart, the Ascendant is the starting point. It is the cusp of the first house, and every other house is counted on from it. Astrologers read it as the way you meet the world: your first response to a new room, the pace at which you begin things, the impression people form before they know you well. If the Sun describes what drives you, the rising sign describes the door you come through. The planet that rules your rising sign is traditionally called the chart ruler, and where it stands adds a further layer to the reading.
Your Sun sign comes from the date. The rising sign comes from a moment and a horizon, and both have to be right.
The time matters because the horizon moves quickly against the zodiac. Two people born on the same day in the same town, a few hours apart, share a Sun sign and often a Moon sign as well, yet they have different rising signs. Even within the hour the Ascendant keeps moving, and near the border of a sign a small error in the time is enough to carry it into the next one.
The place matters because the horizon is local. The latitude sets the angle at which the zodiac crosses your horizon, and the longitude sets where that horizon stood in the Earth's turn at a given clock time. The birthplace also tells us which clock was in use. Time zones and daylight-saving rules have changed many times over the decades, and a birth time written down in local time has to be converted with the rules in force on that day, in that place. Once you choose the birthplace, the calculator applies those historical rules automatically.
The arithmetic is not the weak point. Our calculation agrees with an independent reference ephemeris to within 0.2 arc-seconds for the Ascendant, so the limit on your result is the birth time you give it. Without a time or a place, the free chart still shows your Sun and Moon, and leaves the rising sign out rather than guess.
The rising sign is only as good as the time behind it. Before you enter one, look for the most direct record you can find:
A family memory like "just after breakfast" is worth having, but treat it as a range, not a minute. Then test that range. Enter the earliest time the birth could have happened and note the rising sign, then enter the latest. If both give the same sign, you can rely on it without knowing the exact minute. If they give different signs, the rising sign stays open for now, and your Sun and Moon are the firmer ground.
It also helps to look at the degree printed beside your rising sign. An Ascendant in the middle of a sign survives a small error in the time; one in the first or last degree of a sign may not. If all you know is "sometime in the morning", leave the time out. You will still see what the date can tell you, and you can add the rising sign once you find the time.
The three most personal points of a chart move at very different speeds. The Sun's sign is set by the date, the Moon changes sign roughly every two and a quarter days, and the rising sign about every two hours. That difference in speed is part of why they describe different layers of a person.
The Sun sign, the one most people know, describes your core: what you are working towards. The Moon sign describes your emotional home, what you need in order to feel settled. The rising sign is the most individual of the three, because it depends on the hour and the place as well as the day. It is often the layer others notice first, and some people recognise their rising sign more readily in how friends describe them than in how they see themselves.
To see the three as a set, the big three calculator explains how they combine. If you mainly want your Moon, the Moon sign calculator covers the days when the birth time decides it, and our guide to the Moon sign goes further into what it describes.
Not reliably, so the free chart leaves it out instead of guessing. The rising sign changes on average about every two hours, which means one date allows several possible signs. If you can narrow the time to a range, enter its earliest and its latest point. When both give the same sign, you have your answer.
Yes. The Ascendant is the exact degree of the zodiac on the eastern horizon at your birth, and the rising sign is the sign that degree falls in. The two names are used almost interchangeably. The degree adds precision: it shows how close your Ascendant sits to the border of the neighbouring sign.
The rising sign is measured against the horizon of the place where you were born, so the same minute gives a different Ascendant in Lisbon and in Tokyo. The birthplace also tells the calculator which time-zone and daylight-saving rules applied on your birth date, so the time on your certificate is converted correctly.
Our calculation agrees with an independent reference ephemeris to within 0.2 arc-seconds for the Ascendant, far finer than any sign boundary. In practice the limit is the birth time you enter, not the arithmetic. A time that is right to the minute gives a dependable rising sign; a rounded or remembered time is better checked as a range.
Yes. The chart is calculated in your own browser, and the free chart needs no e-mail address. It shows your chart wheel with your Sun, Moon and rising sign, each with a short reading. If you want to go further, a detailed written reading of the whole chart can be ordered afterwards.