Zodiac Sign Calculator
Find your zodiac sun sign from your exact birth date including cusp dates. Enter values for instant results with step-by-step formulas.
Formula
Sun Sign = Zodiac segment occupied by the Sun on your birth date
The zodiac is divided into 12 equal 30-degree segments along the ecliptic (the Sun's apparent path across the sky). Each segment corresponds to a constellation and a date range. Your sun sign is determined by which segment the Sun occupied on your date of birth. Standard date ranges are used, though exact transitions can vary by a day depending on the year.
Worked Examples
Example 1: Birthday: July 15
Problem: Determine the zodiac sign, element, and compatibility for someone born on July 15.
Solution: July 15 falls between June 21 – July 22\nZodiac Sign: Cancer\nElement: Water\nModality: Cardinal\nRuling Planet: Moon\nCompatible Signs: Scorpio, Pisces, Taurus, Virgo
Result: Cancer ♋ | Water Element | Cardinal Modality | Ruled by Moon
Example 2: Birthday: November 5
Problem: Find the zodiac details for someone born on November 5.
Solution: November 5 falls between October 23 – November 21\nZodiac Sign: Scorpio\nElement: Water\nModality: Fixed\nRuling Planet: Pluto & Mars\nCompatible Signs: Cancer, Pisces, Virgo, Capricorn
Result: Scorpio ♏ | Water Element | Fixed Modality | Ruled by Pluto & Mars
Frequently Asked Questions
How is my zodiac sign determined?
Your zodiac (sun) sign is determined by the position of the Sun along the ecliptic at the time of your birth. The zodiac is divided into 12 equal segments of 30 degrees each, corresponding to 12 constellations. The sun spends approximately one month in each sign. Your sign is based on your birth date — specifically, which segment the Sun occupied on that date. While exact boundary dates can shift slightly year to year due to the Sun's orbital mechanics, standard date ranges are used for general purposes.
Is zodiac compatibility scientifically proven?
No. There is no scientific evidence that zodiac signs influence personality, behavior, or romantic compatibility. Astrology is considered a pseudoscience by the scientific community. Studies testing astrological claims have consistently found no correlation between birth dates and personality traits or relationship outcomes. Zodiac compatibility is best enjoyed as entertainment and cultural tradition rather than a basis for making life decisions. Healthy relationships depend on communication, respect, shared values, and effort — not star signs.
Can I use Zodiac Sign Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Is Zodiac Sign Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.