---
title: "Moon sign calculator"
url: https://www.skyabove.ai/tools/moon-sign-calculator
date: 2026-10-11T00:00:00.000Z
updated: 2026-10-11T00:00:00.000Z
author: Sky Above
editor: Param Bahia
---

# Moon sign calculator

Your Moon sign describes how you feel your way through things: what soothes you, what unsettles you, what you need to feel safe. It often explains the part of you that your Sun sign misses.

_Interactive calculator: open the page in a browser._

## How it works

The Moon changes sign about every two and a half days. This calculator holds every one of those changes from 1900 to 2039, computed with the Swiss Ephemeris to the minute. It finds the sign the Moon was in at your birth.

If you leave the time blank and the Moon changed sign on your birth date, the calculator shows both signs and the minute of the change. Your birth time decides which one is yours.

## A worked example

Take a birth on Sat 24 Oct 2026, the day Mercury stations retrograde. The Moon entered Aries late on the evening before, so anyone born that day, at any time in UTC, has the Moon in Aries.

For the rest of your chart, including your rising sign and houses, [start with your full chart](/start).