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Gold line-art emblem: a seated cat in profile beneath a crescent moon, ringed by art-nouveau stars and vines
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Cat Birth Chart Calculator

Get your cat's Sun sign free and instant — then unlock their full birth chart (Moon, Rising & more) in the Aetris app.

☀ Sun · revealed ☽ Moon · in the app ↑ Rising · in the app

Get the Full Birth Chart Free Get early access — iOS
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No Birth Date? Most Cats Don’t Have One.

Shelter intake dates are estimates and strays arrive with no history at all — which is exactly the case Rectification AI was built for.

Aetris reads feline behavior — how your cat claims territory, seeks height, tolerates handling, and recovers from disruption — and reconstructs the most probable natal chart from it, Sun, Moon and Rising included.

Download Aetris to build your cat's chart from behavior alone.

Try Rectification AI Free Get early access — iOS
Inside the Aetris app
Aetris Soul Portal for a cat — her photo orbited by Sun in Aries, Moon in Cancer and Rising in Scorpio, marked AI Rectified

A cat chart is three placements, not one.

  • Moon sign — the layer that governs startle response and how fast your cat settles
  • Rectification AI — a full chart for a rescue cat with no known birthday, rebuilt from behavior
  • A daily horoscope written from your own cat's chart, not generic sign text
  • Your cat's Star Beast — one of forty-eight, set by their sign and the moon phase they were born under
  • Your own Human Oracle — your daily horoscope and full birth chart, sitting alongside your cat's
Get the Full Birth Chart Free
Free on Android
Free on Android today — iOS early access below
How it works

How a Cat Birth Chart Works

A cat born at a given moment has exactly the same sky above them as anyone else born at that moment, so the chart is calculated identically to a human one.

What changes is the reading. Human charts get interpreted through career, ambition and relationships; a cat's has to be read through feline behavior — territory, routine, hunting drive, height-seeking, and the very particular question of who is allowed to touch them and when.

Cat astrology chart vs cat birth chart

A cat astrology chart and a cat birth chart are two names for the same thing. Where the two separate is interpretation. A human chart is read through career, ambition and partnership, and none of those describe a cat's day. A cat's has to be read through what genuinely governs one: which surfaces count as theirs, how far off the floor they choose to sit, what the arrival of a stranger does to the room, and whether affection is offered to you or granted to you.

The Sun sign: your cat's default setting

The Sun sign is the layer this calculator gives you, and it describes the posture your cat takes toward the world when nothing is wrong.

  • The Taurus cat — built around comfort and routine
  • The Scorpio cat — committed to exactly one person
  • The Aquarius cat — operating on logic nobody else can follow

It is the single most useful placement to know, and the only one a birth date alone can produce.

Why cusp birthdays need real astronomy

The Sun does not change sign at midnight. It crosses each boundary at a precise moment that drifts by roughly six hours a year and resets on the leap day, which is why the Leo-to-Virgo handover falls on August 22 in some years and August 23 in others.

A printed table cannot resolve those days. This calculator computes the Sun's actual position for the date you enter, so on the twelve or so changeover days a year it says so outright and names both signs — and from there the birth time decides.

Where cat astrology goes deeper

The full chart adds the Moon sign, which governs how your cat reacts rather than who they are, and the Rising sign, which is the version of your cat that strangers meet. Both need a birth time — and both are what the Aetris app is built to calculate.

Keep reading
Common questions

Cat Birth Chart FAQ

What is a cat birth chart? +
A cat birth chart is the map of where the Sun, Moon and planets sat at the moment your cat was born. The Sun sign is the first layer and the only one a birth date alone can give you — it describes your cat's core temperament. The Moon sign governs emotional reactivity, which in cats is often the layer owners actually live with, and the Rising sign describes how they behave in the first ten minutes with a stranger. Those two need a birth time, which is what the Aetris app calculates.
How do I calculate my cat's birth chart? +
Enter your cat's birth date in the calculator above and you get their Sun sign immediately, along with a feline-specific personality read. The calculator works out where the Sun actually was on that date rather than reading a fixed table, so it also tells you when a birthday lands on one of the twelve changeover days a year and names the two signs in play. For the Moon and Rising placements you need the birth time as well, and the app handles that.
Can I get my cat's birth chart without a birth date? +
Yes, and it is the normal case rather than the exception — most cats are adopted with an estimated birthday or none at all. Tick the box above and the page explains the route: the Aetris app's Rectification AI reads observed behavior, such as how your cat claims territory, seeks height, tolerates handling and recovers from disruption, and reconstructs the most probable chart from those patterns. What comes back is an estimate built from behavior, not a recovered record.
What does my cat's Moon sign mean? +
The Moon sign describes emotional wiring: how quickly your cat startles, how long a disruption takes to shake off, whether comfort is sought or refused. In cats this layer tends to be more visible day to day than the Sun sign, which is why owners who find the Sun sign 'not quite right' usually recognise the cat immediately in the Moon. Calculating it needs the birth time as well as the date.
iOS is coming.

Aetris is on Android today. Join the list and you'll be first in when iOS lands.