Free Birth Chart Calculator

Enter your birth details below to get your complete natal chart — your Sun, Moon, and Rising signs, a full chart wheel, planetary positions, houses, and aspects. Free, instant, and no signup required.

No signup required. Your data is not stored.

What Your Birth Chart Reveals

Your birth chart is a map of the sky frozen at the moment you took your first breath. Every planet occupied a precise position in one of the twelve zodiac signs and one of the twelve houses — and that unique configuration never repeats. It shapes how you love, how you communicate, what drives you, and the lessons your life keeps circling back to.

Most people only know their Sun sign — the sign the Sun occupied on their birthday. But the Sun is one of twelve placements. Your Moon sign governs your emotional world, Venus shapes how you love, Mercury how you think and speak, Mars what you fight for. Reading them together is the difference between a horoscope and real astrology.

The Big Three: Sun, Moon & Rising

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Sun Sign

Your core identity, vitality, and the essence of who you are becoming. The hero of your story.

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Moon Sign

Your inner emotional world — what you need to feel safe, how you process feelings, your instinctive reactions.

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Rising Sign

Your Ascendant — the mask you wear, first impressions you give, and the lens through which you approach life.

Frequently Asked Questions

What is a birth chart?

A birth chart (also called a natal chart) is a snapshot of the sky at the exact moment and place you were born. It maps the positions of the Sun, Moon, and planets across the twelve zodiac signs and twelve houses, forming a unique cosmic blueprint of your personality, relationships, and life patterns.

What do I need to calculate my birth chart?

Three things: your birth date, your birth time (as exact as possible — it is usually on your birth certificate), and your birth city. If you do not know your birth time, you can still calculate your chart; your planet signs will be accurate, but your Rising sign and houses will be approximate.

What are the Big Three in astrology?

Your Big Three are your Sun sign (your core identity), your Moon sign (your emotional inner world), and your Rising sign or Ascendant (how you come across to others). Together they give a far more accurate picture of your personality than your Sun sign alone.

Is this birth chart calculator really free?

Yes. The calculator, your natal wheel, planetary positions, houses, and placement interpretations are completely free with no signup required. Creating a free account lets you save your chart and unlock daily transits, AI readings, and compatibility tools.

How accurate is the calculation?

Align uses the Swiss Ephemeris — the same professional-grade astronomical data used by research astrologers — so planetary positions are accurate to a fraction of a degree for any birth date and location.

What if I don’t know my birth time?

Check the "I don’t know my birth time" option and we will calculate your chart for 12:00 noon. Your Sun, Moon (usually), and planet signs will still be correct, but treat your Rising sign and house placements as approximate.

Go Deeper Into Your Chart

Sun Signs

All 12 Zodiac Signs

Moon Signs

Your Emotional World

Rising Signs

Your Ascendant

Venus Signs

Your Love Language

Mars Signs

Your Drive & Desire

Personality

Sun-Moon Combinations

Houses

Planets in Houses

Compatibility

Sign Matches

Synastry

Relationship Aspects

Your Chart Is Just the Beginning

Save your chart, get AI-powered readings, daily transit forecasts, and compatibility analysis with Align — free to start, available in 20 languages.

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