Rising Sign Calculator (Ascendant)
Find your rising sign (Ascendant) from birth date, exact time and city, with its degree, your Sun and Moon signs, the time window it held and an hour-by-hour table.
Tropical zodiac. The Ascendant is the degree of the zodiac rising on the eastern horizon at the birth moment (1990-06-15 12:30 UTC, UTC−4:00).
| Local time | Ascendant |
|---|---|
| 00:00 | Aquarius 25°23′ |
| 01:00 | Pisces 19°58′ |
| 02:00 | Aries 15°56′ |
| 03:00 | Taurus 9°47′ |
| 04:00 | Taurus 29°54′ |
| 05:00 | Gemini 16°42′ |
| 06:00 | Cancer 1°12′ |
| 07:00 | Cancer 14°18′ |
| 08:00 | Cancer 26°35′ |
| 09:00 | Leo 8°29′ |
| 10:00 | Leo 20°15′ |
| 11:00 | Virgo 2°02′ |
| 12:00 | Virgo 13°52′ |
| 13:00 | Virgo 25°47′ |
| 14:00 | Libra 7°44′ |
| 15:00 | Libra 19°38′ |
| 16:00 | Scorpio 1°27′ |
| 17:00 | Scorpio 13°13′ |
| 18:00 | Scorpio 25°00′ |
| 19:00 | Sagittarius 6°59′ |
| 20:00 | Sagittarius 19°28′ |
| 21:00 | Capricorn 2°54′ |
| 22:00 | Capricorn 17°58′ |
| 23:00 | Aquarius 5°39′ |
Your rising sign, or Ascendant, is the sign that was coming up over the eastern horizon at the minute you were born. Because the whole zodiac rises once a day, it changes about every two hours, which is why astrologers ask for an exact birth time and place. This calculator finds the Ascendant to the arcminute, shows how long that sign was rising on your birthday, and lists the rising sign for every hour of the day in case your time is uncertain.
How to use this tool
- Enter your birth date and the local time on your birth certificate.
- Pick the birth city, or enter latitude, longitude and time zone under “Other place”.
- Read your rising sign and degree; check the time window and the hourly table if your birth time is approximate.
Formula
Asc = atan2(cos θ, −(sin θ · cos ε + tan φ · sin ε))
θ is the local apparent sidereal time in degrees (Greenwich sidereal time, Meeus ch. 12, plus east longitude), ε is the true obliquity of the ecliptic (about 23.44°) and φ the geographic latitude. The result is the ecliptic longitude of the eastern horizon; dividing by 30° gives the sign.
Example
At 0h UT on 10 April 1987 in Greenwich (51.48° N) the sidereal time is 197.692° (Meeus Example 12.a) and the obliquity 23.4436°. The formula gives 256.94°, so the rising sign is Sagittarius 16°56′. Two hours later Capricorn would be rising.
Frequently asked questions
What if I do not know my birth time?
Use the hourly table: if your rising sign is the same across your possible birth times, you know it. Otherwise ask for the time recorded on the long-form birth certificate or hospital record.
Why do some rising signs last longer than others?
The ecliptic is tilted against the equator, so some signs cross the horizon at a shallow angle and rise slowly (up to about three hours at mid-northern latitudes) while others rise in under an hour. The effect grows toward the poles.
How is the rising sign different from the Sun sign?
The Sun sign depends only on the date. The rising sign depends on the time and place, so two people born on the same day in different cities or hours usually have different Ascendants.
Astrology is presented for entertainment and self-reflection only. The Ascendant is a real astronomical point, but its astrological meaning has no scientific basis; nothing here is health, financial, legal or relationship advice. How we check our calculators · Full disclaimer
Last updated:
Page address with these inputs: https://kakao.mobile/tools/rising-sign-calculator/
Cite or embed this tool
kakaoCalc. (2026, November 8). Rising Sign Calculator (Ascendant). https://kakao.mobile/tools/rising-sign-calculator/
“Rising Sign Calculator (Ascendant).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/rising-sign-calculator/.
Paste this code into your page. The widget runs in your visitors' browsers, shows no ads and keeps a link back to this page. Embedding terms