Birth Chart Calculator
Discover your Sun sign, Moon sign, Rising sign, and planetary placements with our free astrology birth chart calculator.
Note: For a fully precise birth chart with exact degrees, a professional astrology tool using a Swiss Ephemeris is recommended. This calculator provides a helpful overview based on your birth data.
Enter Your Birth Details
Your birth time determines your Rising (Ascendant) sign and house placements. Without it, we can still calculate your Sun, Moon, and planetary signs.
What Your Birth Chart Reveals
Sun Sign
Your sun sign represents your core identity, ego, and conscious self. It describes your fundamental nature — how you express yourself and what you're here to become. This is the sign most people know.
Moon Sign
Your moon sign reveals your emotional inner world — how you feel, what makes you feel safe, and your instinctive reactions. It governs your subconscious patterns and emotional needs in relationships.
Rising Sign
Your rising sign (ascendant) is how you appear to others and how you approach the world. It shapes your physical appearance, first impressions, and the 'mask' you wear as you navigate daily life.
Mercury Sign
Mercury governs communication, thinking style, and how you process information. Your Mercury sign shows how you speak, write, and learn — and how your mind naturally works.
Venus Sign
Venus rules love, beauty, and pleasure. Your Venus sign reveals what you find attractive, how you express affection, and what you seek in romantic relationships.
Mars Sign
Mars governs drive, ambition, and desire. Your Mars sign shows how you take action, what motivates you, and how you pursue your goals and desires — including in romance.
What Is a Birth Chart?
A birth chart (also called a natal chart or astrology chart) is a map of the sky at the exact moment you were born. It shows the positions of the sun, moon, and all the planets in the zodiac signs and houses, creating a unique celestial snapshot that astrologers interpret as a blueprint of your personality, strengths, challenges, and life themes.
Your birth chart is calculated using three pieces of information: your date of birth, time of birth, and place of birth. The date determines your sun sign and approximate positions of slower-moving planets. The time of birth is crucial for determining your rising sign (ascendant) and the exact house positions of every planet. The place of birth affects the house calculations through local sidereal time.
The most well-known part of a birth chart is the 'Big Three': your Sun sign, Moon sign, and Rising sign (Ascendant). Together, these three placements give the most comprehensive picture of your core identity, emotional nature, and outward persona. Beyond the Big Three, each of the other planets — Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto — occupies a specific sign, adding nuance and depth to your overall astrological profile.
Birth charts are divided into twelve houses, each governing a different area of life — from your sense of self (1st house) to career (10th house) to spirituality (12th house). The combination of which planets fall in which signs and houses creates the rich, multi-layered picture that astrologers use to understand your unique cosmic blueprint.
Sun Sign vs. Moon Sign vs. Rising Sign
Your Sun sign is the most famous — it's determined by your birthday and represents your core identity and conscious self. When someone asks 'what's your sign?', they're asking about your sun sign. It describes your fundamental character, your ego, and your life purpose.
Your Moon sign is determined by where the moon was when you were born. The moon moves through a new sign approximately every 2.5 days. Your moon sign governs your emotional inner world — your instincts, what makes you feel secure, and how you process feelings. Many astrologers consider the moon sign even more revealing than the sun sign for understanding someone's true inner nature.
Your Rising sign (also called your Ascendant) is calculated from your exact birth time and changes every two hours. It describes how you present yourself to the world, your physical appearance tendencies, and how others perceive you. The rising sign also sets the foundation of your entire house system, making your birth time the most important factor in a complete astrological chart.