Free Birth Chart Calculator
Enter your birth details to generate your complete natal chart — your sun, moon and rising signs, every planet, house and aspect. Calculated with real ephemeris accuracy, instantly, in your browser.
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 where the Sun, Moon and planets sat against the twelve zodiac signs, and divides the sky into twelve houses representing different areas of life. Read together, these placements form a detailed portrait of your personality, drives and patterns.
Most people know only their sun sign. A full birth chart is far richer: your moon sign describes your emotional world, your rising sign shapes how others first see you, and your Venus sign reveals how you love. Calculating your whole chart is the only way to see how these pieces fit together.
How to read your chart
Start with your Big Three — Sun, Moon and Rising — shown at the top of your result. Then look at the wheel: each glyph is a planet, placed in the sign and house it occupied at your birth. The table beside it lists every placement with its exact degree, so you can explore aspects and patterns just as an astrologer would.
Why ChartLune is accurate
Many free chart sites cut corners on timezones, which throws off the Ascendant and houses. ChartLune resolves the historical timezone and daylight-saving rules for your exact birth city and date, then computes positions from professional-grade ephemeris data — so the chart you get here matches paid astrology software.
Frequently asked questions
How accurate is this birth chart calculator?
Very. We compute planetary positions from the Moshier ephemeris (the same astronomical lineage as the Swiss Ephemeris used by professional astrologers) and resolve your birth timezone — including historical daylight saving — from your birth city. The result matches professional software.
Is the birth chart calculator really free?
Yes — completely free, with no sign-up, no email and no paywall. Every placement, the chart wheel and the interpretations are shown instantly.
Do you store my birth data?
No. The entire calculation runs inside your browser. Your birth date, time and place are never sent to or stored on any server.
What do I need to calculate my birth chart?
Your date of birth, your time of birth, and your birth city. The date and city alone give you an accurate Sun, Moon and planets; an exact birth time adds your Rising sign and house placements.
What if I don't know my birth time?
You can still get a meaningful chart — tick 'I don't know my birth time' and we'll use noon. Your Sun, Moon and most planets will be correct; only your Rising sign and houses need an exact time.
What are the Big Three in astrology?
Your Big Three are your Sun sign (core identity), Moon sign (emotional world) and Rising sign or Ascendant (how you come across). Together they give a much fuller picture than your sun sign alone.
Explore your full chart
Your birth chart is one piece of the picture. Calculate your complete free birth chart to see every placement together — or explore these: