Astrology tools & calculators
Free, no sign-up, accurate to the arc-second — take the calculator your question needs right now.
The starting point is always the same: your birth chart. Every other calculator reads from it — today’s transits, your moon phase, your lunar nodes, your houses and your compatibility with a partner. All computed with the Swiss Ephemeris. Prefer to go step by step? Our online astrology course teaches you astrology & tarot in 30 days — 5 minutes a day.
Today’s sky
What’s happening in the sky today — as your personal daily horoscope, a look at the current planets, or a calendar of the key events.
Transits – your daily horoscope
Your horoscope for today — from your real birth chart, not just your star sign.
Sky today – where the planets are now
Where every planet is right now — plus today’s astrological weather. No birth data needed.
Astrology calendar – key events
Mercury retrograde, full and new moons and major sign changes — the key dates in the sky.
Mercury retrograde – every date
Every phase this year and next — with dates, signs and what they practically mean.
Your chart
Everything inside your birth chart — from the whole chart to your Big Three, your houses, signs and aspects.
Birth chart – your whole chart
Your complete chart — all your planets, explained simply and clearly.
Sun, Moon & Rising – your Big Three
Your three most defining signs — Sun and Moon even without a birth time, Rising with your time.
Star signs – where your planets sit
Which sign each of your planets is in — Sun, Moon, Mercury and more.
Astrology houses – your life areas
The twelve areas of life in your chart — from love to career (astrologers call them houses).
Aspects – how your planets connect
How your planets connect — which tensions and talents shape your chart.
Solar return – your year ahead
Your personal horoscope for the year ahead — starting on your birthday.
Love & relationship
How well you fit — your chart-to-chart comparison and your relationship’s own shared chart.
Comparison
Astro-Seek, Astrodienst or us?
An honest comparison of the free birth chart tools — which one fits you?
Take your sky with you.
Your Astro Yearbook: a book that exists only once — computed live from your birth chart, with your chart wheel on the cover and the exact days the sky touches you this year.
Quick answers from your details
Small, free calculators for a single question — instant, no sign-up. Your moon phase, your lunar nodes or your element balance in seconds.
Look up one part of your chart
Want just one point — your Moon sign, your Venus, your South Node, a specific aspect? These free mini-calculators find it in your chart and explain it.
Understand what you just calculated
What is a house? An aspect? A ruler? These short, plain-language guides explain what a chart is made of — step by step, no jargon.
Not sure where to start?
Questions about the tools
Quick answers: what the tools do, what they cost, and which birth details you actually need.
What are astrology tools?
Astrology tools are free calculators that turn your birth details into real astronomical positions — your birth chart, today’s transits, your moon phase, your houses and more. We use the same Swiss-Ephemeris engine that professional astrology software runs on.
Are these astrology calculators free?
Yes — every calculator on this page is completely free, with no sign-up and no credit card. If you want to go deeper and learn to read your whole chart yourself, that’s what our 30-day guide is for.
Which astrology tool should I start with?
With the birth chart — it’s the foundation everything else is read from. After that, look at today’s transits (your daily horoscope) and your moon phase. New to astrology? Start with the basics further down.
Do I need my exact birth time?
For most tools, no — sun sign, moon phase and lunar nodes work with the date alone. For your Ascendant and exact house placements you do need your birth time, because they change over the course of a day.
Reviewed by Theresa Touhey · Astrologer & Tarot Reader
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