Free tool
Astrology calculators
Free tools that compute the real positions of the sky - no sales interpretations, just your data.
Full charts
Birth chart
Each planet's sign and house, the house cusps, and the aspects, drawn as a wheel.
Open →Synastry (compatibility)
The aspects between two birth charts and the composite chart.
Open →Composite chart
The relationship's own chart, built from the midpoints between two birth charts.
Open →Davison chart
The other couple's chart: a real chart for the midpoint in time and space between two births, not an average of two charts.
Open →Progressed chart
Secondary progressions, a day for a year: your progressed Moon and Sun for any date, and their contacts to your birth chart.
Open →Planet signs
What Zodiac Sign Am I?
Your exact Sun sign from your birth date, computed for your year, with proof of when the Sun arrived.
Open →Moon sign
Find which sign the Moon was in when you were born, from the date alone. No city, no account.
Open →Which sign was Mercury in when you were born?
Mercury never strays far from the Sun, so your Mercury sits in your Sun sign or the one beside it.
Open →Which sign was Jupiter in when you were born?
Jupiter moves slowly, about a year per sign, so your birth date settles it on all but the rarest days.
Open →Which sign was Saturn in when you were born?
Saturn is the slowest classical planet — about two and a half years per sign — so your birth date settles it on all but the rarest days.
Open →Venus sign
How you love and what you find beautiful. Birth date is enough, and on a changeover day we show both signs.
Open →Mars sign
How you chase, argue and spend effort. Birth date is enough, with a retrograde note when it applies.
Open →Chiron
The old hurt that turned into a skill. Birth date only, with an honest note on why your whole cohort shares it.
Open →Big Three
Sun, Moon and rising in one pass, read as a set rather than three labels. Needs an exact birth time.
Open →Points & patterns
Rising Sign Calculator
Find the sign that was rising when you were born, down to the exact degree.
Open →Midheaven (MC)
The top of your chart: public face and direction of work. Needs an exact birth time, and we say how much a rounded one costs you.
Open →North Node Calculator
Find your North Node sign from your birth date alone, plus the South Node comfort zone it grows away from.
Open →Part of Fortune
The oldest Arabic lot, with the correct day or night formula and the number the other convention would have given.
Open →Black Moon Lilith
The point that refuses to be managed. We compute the mean Lilith and explain how the true one differs.
Open →Dominant planet calculator
Which planet, element and modality lead your chart, with every score shown and the scoring rules printed in full.
Open →Do you have a stellium?
Every pile-up of three or more planets in one sign or house, with the counting rule and how common it is.
Open →Returns & cycles
Saturn Return Calculator
Enter your birth date and get the exact windows and dates of all three Saturn returns.
Open →When does your Chiron return arrive?
Your once-in-a-lifetime return window around age 50, with the exact pass dates.
Open →Solar return calculator
The exact moment the Sun returns to its natal degree, and the chart for that instant, cast at your birth place or where you will be.
Open →The sky now
Moon phase
The moon phase for any date.
Open →Mercury Retrograde at Birth
Enter your birth date and find out in seconds whether Mercury was retrograde or direct on the day you arrived.
Open →Transit calculator
Where the planets are right now, which house of your chart they are crossing, and every angle they make to it, with the orb shown.
Open →