Birth chart calculator: your natal chart, free and instant
Your date, time and place of birth are all it takes. We calculate your natal chart with rising sign, houses, every planet and the aspects. No sign-up.
Your birth details
What your birth chart shows
A birth chart is a drawing of the sky at the moment you were born, seen from your place of birth. The circle is the zodiac, the rising sign sits on the left, and every planet stands where it stood then: in a sign and in one of the twelve houses.
You read it in three steps. First the Sun, Moon and rising sign, the big three. Then the houses where your planets gather. Last the aspects, the angles between the planets: they show what works together in you and what creates friction.
How we calculate
The planetary positions come from the same ephemeris as the FalciDilara app. It is verified against data from NASA’s Jet Propulsion Laboratory and accurate to the arcminute. Longitudes are geocentric and tropical, as is standard in Western astrology.
Your birth time is converted to universal time with the historical time zone rules of your birthplace, including the daylight saving time of that year. The rising sign and midheaven follow from the sidereal time at your place of birth.
The houses are calculated with Placidus, the system most calculators and astrologers use. Only beyond the polar circle, where Placidus does not exist, we use equal houses from the rising sign and say so.
Frequently asked questions
Is the calculation really free?
Yes. Chart, rising sign, houses, planets and aspects are free and need no sign-up. Only the detailed reading by Dilara in the app costs credits, and only once.
How exact does my birth time have to be?
The rising sign moves one degree every four minutes. A quarter of an hour shifts it by about four degrees, so near a sign boundary it changes sign. The Sun, Moon and planets are barely affected.
What if I do not know my birth time?
Then the calculator shows the planets in their signs, but no rising sign and no houses. The time is usually on the full birth certificate, in hospital records or in a baby book.
Can a birth chart tell me about the future?
The chart itself describes what you were born with, and it never changes. To see what is coming, you lay today’s sky over it: those are the transits. The calculator shows the most important ones for today. In the app you see all transits of the next twelve months with their dates for free, plus your solar return chart for the year of life.
Why does another calculator show different houses?
There are several house systems. We use Placidus, like most calculators. If another one is set to Koch, whole sign or equal houses, the house boundaries differ. The planets are in the same sign and degree in every system.