Birth Time Lab

Free tool

Ascendant Calculator: Find Your Rising Sign

Enter your birth date, time and place to get your and . The result also shows how long your rising sign lasted that day, so you can see how much a few minutes of doubt could matter.

Narrow it down with your life events

A calculator needs a time. Our report works the other way round: it tests the possible times against the dated events of your life and sends the most likely window, with the evidence and a confidence level. First, the free range check shows how many rising signs fit.

Start my rectification — US$ 79

See a finished report first in the sample report.

What the ascendant calculator shows

The rising sign, or ascendant, is the zodiac sign on the eastern horizon at the moment of birth. The Midheaven is the highest point of the chart, the cusp of the 10th house. Both come from your date, your time and the latitude and longitude of your birthplace.

The horizon turns through all twelve signs every day, so a rising sign lasts about two hours on average, less or more depending on the latitude and the season. That is why the calculator shows the stretch of the day in which your sign held. It says what each point is; it doesn't interpret it.

Born in the US?

Birth records are kept by each state, so what appears on your certificate depends on the state and the year. Read how to find out what time you were born for where to look.

Short answers

What do I need to calculate my rising sign?
Your date, time and place of birth. The time matters most, because the rising sign changes about every 2 hours.
What if I only know my birth time roughly?
Use the free range check: enter the earliest and latest time that could be right and it lists every rising sign inside that range, with the time each one starts and ends.
Does it handle daylight saving time?
The time you enter is read as the clock time at your place of birth in the US, using the historical time zone rules for that date, including daylight saving time. If the clocks went forward and your time falls in the skipped hour, the calculator tells you.

More free tools

Want more than a range? See what a full report looks like in the sample report, or start yours.

Astrology is a symbolic practice, not a science. Your report gives the most consistent birth-time window for the events you share. It is not a certified birth time.