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Astrology + Numerology Calculators
Instant results from your birth data — no sign-up required.
What are these calculators?
Astrology calculators are free tools that use your birth data — typically your date, time, and place of birth — to calculate specific placements in your natal chart. A natal chart is a snapshot of where every planet was in the sky the moment you were born. Each planet (and point like the Rising sign or North Node) occupies a specific zodiac sign, which shapes a distinct part of your personality and life experience. These calculators let you explore those placements one at a time without needing a full chart reading.
How to use these free tools
Most calculators here only need your birth date to return a result — no account, no payment, no personal data stored. A few (like the Rising Sign calculator) ask for your birth time and location because those placements change every two hours. If you do not know your exact birth time, start with the date-only calculators: your Sun sign, Mercury sign, Venus sign, Mars sign, Saturn sign, North Node, and numerology numbers all rely only on your birth date and are accurate within one day of a sign boundary.
What you'll learn from each calculator
Each calculator focuses on a single dimension of your chart and explains what it means in plain language. Your Venus sign reveals how you give and receive love. Your Mercury sign describes your communication and thinking style. Your Saturn sign points to your deepest life lessons and your Saturn Return timing. Numerology calculators like the Life Path Number and Maturity Number offer a complementary lens from the Pythagorean tradition — derived from your birth date and name rather than planetary positions. Together, these tools give you a rounded picture of your cosmic makeup.
Calculator set
Astrology Calculators
Placement, timing, and relationship tools that read your chart data in different ways.
Rising Sign
Find your Ascendant from your birth date and time
Your rising sign is the zodiac sign that was on the eastern horizon when you were born — the fastest-changing chart point, updating every 2 hours.
Open calculator →Compatibility Checker
Compare two zodiac signs by element and modality
Enter two sun signs to see how their elements and modalities interact — a quick snapshot of natural harmony and friction.
Open calculator →Chinese Zodiac
Find your animal sign, element, and yin/yang polarity
Based on your birth year, discover your Chinese zodiac animal, its elemental nature, and how to interpret its timing influence.
Open calculator →Moon Phase Birthday
Discover what moon you were born under
Enter your birth date to see the moon's phase at that exact moment — new moon, full moon, or anywhere in between.
Open calculator →Venus Sign
Find your Venus sign from your birth date
Your Venus sign reveals your love language, what you find beautiful, and how you attract partners.
Open calculator →Mars Sign
Find your Mars sign from your birth date
Your Mars sign reveals your drive, how you pursue goals, and the quality of your physical and sexual energy.
Open calculator →North Node Sign
Find your soul's karmic direction from your birth date
Your North Node sign describes your soul's growth path and life purpose — what you're here to lean into, not just what comes naturally.
Open calculator →Chiron Sign
Find your wounded healer placement
Chiron reveals your core wound and the gifts you develop through healing it.
Open calculator →Biorhythm
See your physical, emotional & intellectual cycles
Three sine-wave cycles from your birth date reveal your energy, mood, and mental clarity rhythms for any given day.
Open calculator →Annual Profections
Find your profected house
Traditional astrology technique: one house activates each year. Find out which life area is being emphasized in your current cycle.
Open calculator →Synastry Quick Check
Compare two birth dates for compatibility
Compare relationship dynamics across chart houses, aspects, and elemental patterns. Open full synastry for the complete analysis.
Open calculator →Vedic Sun Sign
Find your sidereal/Vedic zodiac sign
Western and Vedic zodiac signs differ by ~24° due to precession. See both your tropical and sidereal sun sign.
Open calculator →Saturn Sign
Find your Saturn sign + Saturn Return timing
Saturn reveals karma, discipline, and life lessons. Find whether the chart indicates your Saturn Return timing.
Open calculator →Chinese Element
Find your Chinese zodiac element
Wood, Fire, Earth, Metal, or Water? Your birth year's element shapes your energy alongside your animal sign.
Open calculator →Chinese Zodiac Compatibility
Check Chinese zodiac animal compatibility
Find your trine group (natural allies) and clash animal across all 12 Chinese zodiac signs.
Open calculator →Dominant Element
Find your Fire, Earth, Air or Water dominance
Enter your 7 key planet signs and see which element dominates your natal chart.
Open calculator →Mercury Sign
Find your Mercury zodiac sign
Mercury governs communication, thinking style, and how you learn. Discover your natal Mercury placement.
Open calculator →Jupiter Sign
Find your Jupiter zodiac sign
Jupiter shows where you expand and find growth, confidence, and opportunity.
Open calculator →Dominant Modality
Cardinal, Fixed or Mutable dominance?
Enter 7 planet signs to find whether you're a Cardinal initiator, Fixed sustainer, or Mutable adapter.
Open calculator →Birth Moon Phase
What moon phase were you born under?
New Moon, Full Moon, Waxing or Waning? Your birth moon phase shapes your emotional nature.
Open calculator →Ruling Planet
Find your chart ruler
Your ruling planet comes from your Sun and Rising signs. It colors everything in your birth chart.
Open calculator →Calculator set
Numerology Calculators
Number-based profiles for life themes, cycles, and personal timing.
Life Path Number
Calculate your core numerology number from your birth date
Discover the single-digit (or master number) that reveals your life's central theme, natural gifts, and key challenges.
Open calculator →Expression Number
Find your natural talents from your birth name
Your full name at birth encodes your innate abilities and the role you're here to play. Enter your name to decode it.
Open calculator →Personal Year Number
Discover the theme of your current annual cycle
Each annual cycle carries a distinct numerological vibration. Discover what your personal year number reveals about growth, rest, and transition.
Open calculator →Maturity Number
Find your numerology destiny number
Life Path + Expression = Maturity Number. Reveals who you're becoming in the second half of life.
Open calculator →Birthday Number
Find your numerology gift number
Your birth day reduced to a single digit reveals an innate talent active from birth.
Open calculator →Pinnacle Numbers
Find your 4 life phase numbers
Four pinnacle numbers reveal the major themes of youth, early adulthood, middle age, and late life.
Open calculator →Want the full picture?
Astrelle's natal chart shows every planet, house, and aspect from your exact birth data — sun, moon, rising, Venus, Mars, and beyond.
Create your free chart