Moon Sign Calculator

Fast, accurate, and free online Moon Sign Calculator tool that runs directly in your browser.

Secure (SSL)

Client-Side Processing

100% Free

Go to tool

Instructions

1

Enter data
Enter content, paste text or load a file from disk.
2

Click the button
The tool will immediately process your data in the browser.
3

Get the result
Copy the finished text or save the file to your device.

                                                function runTool() {

                                                  return "Result ready in 0.1s";

                                                }

Date and time (local)

Strefa czasowa (UTC ±godz.)

Latitude (optional, °)

Longitude (optional, °)

Select a date and time, then click "Calculate."

Rate this tool:

5.0 / 5 · 1 rating

Related tools

Other tools you may find useful

Moon sign calculator 2026 online. Check your Moon Sign from date and time

This tool calculates the Moon Sign for the given date and time. After completing the fields, you will receive: the name of the Moon sign, ecliptic longitude in degrees, position in the sign (0-30°) and the approximate percentage of illumination on the dial. For easier interpretation, we have added a "borderline" indicator when the Moon is very close to changing signs.

Moon Sign

Ecliptic longitude

Sign position

Dial illumination (%)

Jump to algorithm

What the calculator calculates and who it is for

Calculator shows yourMoon signfor the indicated moment. In astrology, it is the complement of the Sun sign, which describes more internal reactions and temperament. The tool is useful if you want to know your own Moon Sign, compare it with another person's, or check the position of the Moon for a specific date. The results are presented clearly and do not require knowledge of astronomy.

Input. How to fill out the form correctly

Date and time (local)- select the exact moment from the calendar, preferably including hours and minutes.
Time Zone (UTC ±hour)- Enter the offset from UTC for the given date. If Daylight Saving Time was in effect on your birthday, include it. Example: Poland in winter is usuallyUTC+1, in summerUTC+2.
Latitude and longitude (optional)- you can enter the coordinates of the place (in decimal degrees). This makes it easier to estimate more precisely, especially when the result is close to the mark limit. Enter e.g.52.23 i 21.01for Warsaw.

The date range is limited to1900–2099. If you enter values out of range or in the wrong zone, the calculator will ask for a correction.

How we count. A simplified explanation of the

algorithm Under the hood, the tool estimates the positions of the Moon and Sun on the ecliptic (in degrees 0–360) according to popular ephemerides approximations. Then:

Step	What is created	What is
Ecliptic longitude of the Moon	`λ_Moon`in degrees 0–360	This is the main coordinate from which we determine the sign and position in the sign.
Moon sign	dividing the circle into 12 parts of 30°	0–30° Aries, 30–60° Taurus, 60–90° Gemini, …, 330–360° Pisces.
Position in sign	`λ_Moonmod 30°`	Shows how deep the Moon enters a given sign (0-30°).
"At sign boundary"	if distance to boundary < 1°	Result is communicated as close to sign change - interpret with caution.
Dial Illumination	`k = (1 − cos D)/2`, where`D = λ_Moon− λ_Sun`	Approximate illumination percentage (0-100%), helpful to find out the phase of the Moon.

This shot is approximate. It is completely sufficient for everyday use. If the result is just around the mark, treat it as "almost on cusp" and consider checking the exact time and zone.

Character Map. How to read names and ranges

Length range	Moon sign	Short description
0°–30°	Aries	impulse, initiative
30°–60°	Taurus	stability, comfort
60°–90°	Gemini	communication, curiosity
90°–120°	Cancer	caring, home
120°–150°	Leo	expression, heart
150°–180°	Virgo	detail, order
180°–210°	Libra	relationships, harmony
210°–240°	Scorpio	intensity, depth
240°–270°	Sagittarius	perspective, journey
270°–300°	Capricorn	structure, purpose
300°–330°	Aquarius	originality, ideas
330°–360°	Pisces	sensitivity, intuition

The table is indicative and serves understanding how the name of a sign is derived from the ecliptic longitude.

Step-by-step instructions

Selectdate and time. When it comes to birth, try to get as accurate a time as possible from the certificate or documentation.
Entertime zonefor this date (include daylight saving time if applicable).
Optionally, specify thecoordinates of thelocation. If you don't know, skip.
ClickCalculate. You will see the Moon's sign, ecliptic longitude, degree in sign, and dial illumination.
If a "borderline" label appears, treat the result as close to change - a minute or other zone difference can skew the result.

Examples of interpretation of results

Example 1: 1995-04-10, 14:30, UTC+2 zone

The calculator can return e.g.Moon in Leo, position in the sign12.4°,ecliptic longitude132.4°,illumination68.1%. This means that the Moon is quite deep in Leo and the phase is close to the gibbous waxing.

Example 2: 1988-11-25, 23:55, zone UTC+1

Result:Moon in Pisces, position in sign2.1°,longitude332.1°,lighting12.3%. The moon is very early in the sign (beginning), and the phase is close to a thin crescent.

Example 3: 2003-06-02, 05:05, UTC+2 zone, on the border of

Result:Moon in Gemini, but with the label "on the border of the sign". This means that the Moon can move from Taurus to Gemini in just a few minutes. It is worth checking the zone and time accurate to minutes.

Want to know what the Moon looks like today and when the next full moon is? Checkcurrent Moon phases and full moon calendar 2026.

Frequently asked questions (FAQ)

Do I need my place of birth?

It is not required, but coordinates may slightly improve the estimate, especially when the result is close to the mark boundary.

What if I don't know if Daylight Saving Time was in effect?

Check the time change calendar for a given year and country. If you get UTC wrong by an hour, the result near the border may change.

Is percent illumination an exact phase?

This is an approximation. If you care about astronomical precision, treat the result as approximate.

Practical tips

The more accurate the time, the more stable the Moon sign result.
A difference of one hour in the zone can change sign when the Moon is close to the border.
The position in a sign (0-30°) helps you judge whether it is the beginning, middle or end of a sign.
If you want to compare two people, count their scores in the same zone rules.

Safety and Responsible Use

The results are for informational and entertainment purposes. They are not a substitute for professional ephemera or specialist advice. If you are unsure about the zone or the exact time, please refer to official sources.