Free natal, synastry & transit calculators

Read the sky with honest precision.

Every chart is computed from real astronomy — sub-arcsecond astronomy (VSOP87/ELP via astronomy-engine) — then paired with centuries-old traditional readings, clearly labelled as such. No predictions sold as fact.

Choose a calculatorHow it's calculated
  • Birth data never uploaded, never stored
  • Free forever · no signup
  • Reviewed by an astronomer
The sky right now
Reading tonight’s sky…
Computed live in your browser

The calculators

One astronomy engine. Dozens of ways to read it.

Every tool below shares the same sub-arcsecond ephemeris and the same free, no-signup promise. Pick a lens — the math is already done right.

All 155 calculators
Natal & Self82 liveSoul & Esoteric11 liveRelationships16 liveTiming & Cycles17 liveLocations & Relocation6 liveHorary & Electional2 liveCalendars & Reference21 live

How it works

Trust the numbers, because you can see them.

This is the part our competitors skip. Here is exactly how a chart gets built — the same method behind every calculator on the site.

Read the full methodology →
  1. 1

    Your birth moment, precisely placed

    Date, exact time and city resolve to a lat/long and a historical timezone with DST applied — the step most sites get silently wrong.

  2. 2

    The ephemeris computes the sky

    sub-arcsecond astronomy (VSOP87/ELP via astronomy-engine). Geocentric longitudes, retrogrades, nodes and lots are calculated for your moment, not approximated.

  3. 3

    Houses, aspects & dignities derived

    Porphyry quadrant houses (whole-sign available on every chart) cusps, major aspects with orbs, essential dignities and element balance are built as one shared feature set every tool reuses.

  4. 4

    A traditional reading, clearly labelled

    Templated interpretation turns each fact into plain-language prose. It is framed as centuries-old symbolism for reflection — never a guaranteed prediction.

Why Astrology Charts

Built to earn trust, not just clicks.

Astrology brushes against health, money and love — the topics search engines hold to the highest bar. We meet it on purpose.

Experience

Real practitioner bylines and a first-person note on every reading — not anonymous content.

Expertise

Chart methodology reviewed by astronomy reviewer Dr. Amara Osei, citing the actual ephemeris and house system.

Authoritativeness

We cite genuine astronomy sources for the mechanics and honest research for the interpretation framing.

Trust

Published & updated dates, a clear birth-data privacy stance, and honest limitations instead of hype.

“The astronomy is a fact. What it’s said to mean is a 4,000-year-old story. We give you both — accurately, and honestly labelled.”
EM

Elena Marchetti

Founder & Staff Astrologer

DA

Dr. Amara Osei

Astronomy Reviewer

Astrology Charts

  • Named author & astronomer reviewer
  • Calculation method published
  • Honest limitations on every tool
  • Birth data never leaves your device
  • Free · no signup · no email wall

Typical tool sites

  • Anonymous, undated content
  • "The stars will change your life"
  • Client-side report, nothing to index
  • Server-side data you can't audit
  • Upsell funnel after the reveal

Learn the concepts

Every calculator has a plain-language guide behind it.

Browse the glossary →

Questions, answered

The things people ask before their first chart.

Yes. Every calculator and report on Astrology Charts is free, with no signup, no email wall and no paywalled sections.

Free forever · no signup

Your chart is a few seconds away — and stays on your device.

Enter your birth data, get an accurate chart and an honest reading. Save it locally and reuse it on every calculator.

Start with the natal chart

Astronomy verified against JPL Horizons — see the probe harness in our methodology.