Birth chart calculator
Enter the date, time and city where you were born.
How to useFree birth chart calculator
My city is not on the list
Astrology is entertainment and has no scientific proof.
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Birth chart calculator: what it is for
A birth chart, or natal chart, shows where the Sun, the Moon and the planets were at the moment you were born. The tool draws the zodiac wheel with each body in its sign and degree, marks the ascendant, the midheaven and the twelve houses, and connects the planets that form aspects.
You also get a table of planets in the signs, which ones are retrograde, the balance between fire, earth, air and water, and a quick reading of each placement. Everything is calculated in your browser, with no sign-up.
How to use
- Enter your date of birth and, if you know it, the time.
- Choose the city where you were born or type the latitude and longitude.
- Tap calculate and see the wheel, the planets, the houses and the aspects.
When to use it
- Finding your Sun, Moon and rising sign.
- Seeing which signs Venus, Mars and the other planets are in.
- Comparing your chart with someone else's.
Frequently asked questions
Do I need to know my time of birth?
For the ascendant, the midheaven and the houses, yes: they change every few minutes. Without the time, the tool still shows the sign of each planet, calculated for noon, and only the Moon may be imprecise. The time is usually on your birth certificate.
How is the chart calculated?
The positions of the Sun, Moon and planets are calculated with astronomical formulas in the tropical zodiac, accurate to a few arcminutes. The time zone and the daylight saving time of the period come from the city you choose. The houses use the equal house system, starting from the ascendant.
What are aspects?
They are the angles between two planets in the chart. Conjunction, sextile and trine are considered harmonious; square and opposition indicate tension that calls for balance. On the wheel, blue lines are harmonious aspects and red lines are tense ones.
Does a birth chart really work?
Astrology has no scientific proof. Use the chart as entertainment and as a starting point to reflect on yourself.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.