Free Astrology Calculators

Every astrology tool on Orbitarot in one place: birth charts, single placements, relationship charts, transits and returns, the Moon's cycles, Vedic charts, BaZi and astrocartography. All of them run in your browser on astronomy checked against NASA JPL data (the Saturn return calculator has its own engine, checked separately), and your birth details never leave your device.

The calculators

Birth chart calculatorWheel, houses, aspects, balance Sun moon rising calculatorYour Sun, Moon and rising sign Rising sign calculatorThe sign on your eastern horizon Moon sign calculatorYour Moon, even without a time Zodiac sign calculatorSun sign from the real Sun, cusps too Mercury sign calculatorHow you think and talk Venus sign calculatorAttraction, taste, affection Mars sign calculatorDrive, courage, desire Jupiter sign calculatorGrowth, with entry dates and returns Chiron sign calculatorThe wounded healer and its return North Node calculatorTrue and mean nodes, South Node Black Moon Lilith calculatorMean lunar apogee Midheaven calculatorThe top of your chart Kundli calculatorVedic chart, North or South Indian Kundli matching calculatorGuna Milan score out of 36 for two people Nakshatra calculatorYour birth star, pada and lord Vimshottari dasha calculatorMaha, antar and pratyantar dates Navamsa chart calculatorD9 chart with vargottama flags Manglik dosha calculatorMars from lagna, Moon and Venus Sade Sati calculatorSaturn's 7.5 years, every date BaZi calculatorFour Pillars from the solar terms Saju calculatorKorean Four Pillars: 사주팔자, ten gods, 대운 Synastry chart calculatorTwo charts, every contact between them Composite chart calculatorOne midpoint chart for the relationship Davison chart calculatorA real chart halfway in time and place Solar return chart calculatorExact return time and the year's chart Lunar return calculatorThe Moon's monthly return, with charts Transit chart calculatorToday's planets on your chart Planetary hours calculatorToday's 24 hours for your city Moon phase todayToday, the month, your birth phase Void of course Moon calendarNow and every void period this month Retrograde calendarStations and shadows, every planet Jupiter return calculatorEvery return, with all passes Human Design chart calculatorType, authority, profile, body graph Saturn returnYour exact return dates Astrology methodZodiac, houses, orbs and accuracy

Your birth chart and placements

Start with the birth chart calculator for the full natal chart: the wheel, every planet in its sign and house, aspects and element balance. If you only want one answer, each placement has its own calculator:

Sun, moon and rising calculator: your big three in one step
Zodiac sign calculator: your Sun sign, including cusp births
Rising sign calculator (ascendant)
Moon sign calculator
Mercury sign, Venus sign, Mars sign and Jupiter sign calculators
Midheaven calculator (MC)
North Node calculator, Chiron sign calculator and Black Moon Lilith calculator

Relationships

Synastry chart: two charts side by side, every contact between them
Composite chart: one midpoint chart for the relationship
Davison chart: a real chart for the moment and place halfway between two births

Timing: transits, returns and cycles

Transit chart: today's planets, and how they touch your chart
Solar return chart: your birthday chart for the year ahead
Lunar return calculator: the Moon's monthly return
Saturn return calculator and Jupiter return calculator
Retrograde calendar: Mercury retrograde dates and every other planet
Moon phase today, the monthly calendar and your birth Moon phase
Void of course Moon calendar
Planetary hours for your location

Vedic astrology

These tools use the sidereal zodiac with the Lahiri ayanamsa, about 24 degrees behind the Western zodiac.

Kundli: Vedic birth chart in North or South Indian style
Nakshatra calculator: your birth star and pada
Vimshottari dasha calculator
Navamsa (D9) chart
Manglik dosha calculator
Sade Sati calculator

Chinese astrology and the world map

BaZi calculator: the Four Pillars of Destiny, with solar terms computed from the Sun's position

How we approach astrology

We treat astrology as a symbolic tradition with a long history, not as a predictive science. The astronomy behind each tool is real and checkable: the method page explains the zodiac, house systems, orbs, time zones and place data we use, and how our planet positions compare with NASA JPL's ephemeris. The interpretations are our own words and describe themes for reflection. Nothing on these pages predicts health, pregnancy, death, legal outcomes or money.

Astrology and tarot share a long history: in the Golden Dawn system each zodiac sign and planet has a Major Arcana card, explained in our guide to tarot and astrology. You can also draw the daily tarot card for your sign, work out your numerology, or ask the I Ching.

Questions

Are these astrology calculators free?

Yes. Every tool is free, with no account and no paid readings. They run in your browser.

Is my birth data private?

Yes. All calculations happen on your device and your birth details are never sent to our server. Share links keep the data in the part of the address after #, which browsers do not send.

How accurate are the calculations?

Our planet positions are checked against NASA JPL's Horizons ephemeris; the method page lists the largest differences we found. The Saturn return calculator uses its own, simpler Saturn engine, within 0.051 degrees of JPL from 1900 to 2100. In practice the accuracy of your birth time matters far more than the engine.

Do you use the tropical or sidereal zodiac?

The Western tools use the tropical zodiac. The Vedic tools (kundli, nakshatra, dasha, navamsa, Manglik, Sade Sati) use the sidereal zodiac with the Lahiri ayanamsa.

Can astrology predict the future?

No. We present astrology as a symbolic language for reflection. No tool on this site predicts events, health, money or relationships.

Read your birth chart

Planets, houses and aspects from your birth date, time and place.

Calculate my chart