What do I need to make a birth chart?

Your birth date, birth time and birth place. The time matters most: it sets your rising sign and your houses. Without it you can still see the signs of the planets, but not the houses or the rising sign.

What is the difference between a birth chart and a horoscope?

A horoscope is usually a general forecast for your sun sign. A birth chart is a personal map built from your exact birth details, so it is specific to you.

What does a retrograde planet in my chart mean?

A retrograde planet looked as if it was moving backwards when you were born. Astrologers often read that energy as more inward or reflective. It is a nuance, not a flaw, and many people have several.

Free Birth Chart Calculator: Your Natal Chart Online

✦ Mercury retrograde runs Oct 24 – Nov 13, 2026 — see dates and what to do ✦

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Free Birth Chart Calculator: Create Your Natal Chart

Enter your birth date, time and place to create your natal chart: a chart wheel with your planets, signs, houses and aspects, and a plain-English reading of each planet. It is free, runs in your browser, and nothing you enter is stored.

Last updated: October 16, 2026 · Tropical zodiac

Create your birth chart

Birth date

Birth time

I don’t know my birth time

Birth city

City not listed? Enter coordinates and time zone

Use a nearby big city’s IANA time zone name. West and South are negative.

House system:

Your details are used in your browser only. Nothing is sent or saved.

How to read your chart in 4 steps

Part	Answers	Example
Planets	What part of you?	Mars = how you act and go after things
Signs	In what style?	Mars in Aries acts boldly and fast
Houses	In which area of life?	7th house = partnerships
Aspects	How do planets interact?	Trine = easy flow, square = tension

Tip: tap any planet on your wheel to read about it. In a hurry? Start with your Big 3 using our Big 3 calculator. New here? Read astrology basics for beginners. More on each planet: planets in astrology and their meanings.

How it works: your local time is converted to universal time, planets come from the open-source Astronomy Engine library (MIT licence), and the rising sign and houses are worked out from your time and latitude. Tropical zodiac, Placidus houses by default. Dates 1900 to 2100, places below 66° latitude. The birth time must be right for houses and rising sign. For reflection and entertainment.

Learn to read your chart with the best astrology books for beginners.

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Birth chart calculator FAQ

What is a birth chart?

A birth chart, or natal chart, is a map of the sky at the exact moment and place you were born. It shows the signs of the Sun, Moon and planets, the twelve houses and the angles (aspects) between the planets.

What if I don't know my birth time?

Tick “I don’t know my birth time”. You will see where the planets were, based on noon on your birth date, but not your rising sign or houses, and the Moon may be off by several degrees. Try to find your birth certificate or ask a relative.

Is this birth chart calculator free and private?

Yes, it is free. The calculation runs in your browser. Your birth details are not sent to our server and are not stored.

Which house system does this use?

Placidus by default, the most widely used system in Western astrology. You can switch to Whole Sign or Equal houses in the tool.

Why does my chart look different on another website?

Small differences usually come from the birth time or place, the house system, or whether the site uses the tropical or the sidereal zodiac. This calculator uses the tropical zodiac.

Keep exploring

Astrology is a tool for reflection and entertainment. It is not a substitute for professional medical, legal or financial advice.