Birth Chart Calculator

Estimate your basic astrology birth chart using your birth date, birth time, time zone, latitude, and longitude. This calculator gives an estimated sun sign, moon sign, rising sign, element balance, modality balance, polarity balance, and chart summary.

Calculate Birth Chart

Birth Chart Estimate = Sun Sign + Moon Sign + Rising Sign + Element / Modality / Polarity Balance
Your result will appear here.

How the birth chart calculator works

Sun sign:
The calculator matches your birth month and day to common Western zodiac sun sign date ranges.

Moon sign:
The calculator estimates moon longitude from birth date, time, and time zone, then matches that degree to a zodiac sign.

Rising sign:
The calculator estimates the ascendant using birth time, time zone, latitude, longitude, and local sidereal time.

Why use a birth chart calculator?

A birth chart calculator helps estimate the main astrology placements used in a natal chart. It is useful for checking your sun sign, moon sign, rising sign, chart element balance, modality balance, and polarity balance in one place.

This calculator is designed for quick astrology estimates. For exact placement degrees, houses, aspects, and planet positions, use full professional chart software.

What your birth chart result means

Your birth chart result gives a simplified astrology profile. The sun sign describes core identity, the moon sign describes emotional patterns, and the rising sign describes first impressions and how you approach the world.

Birth chart tips

Frequently asked questions

What is a birth chart?

A birth chart, also called a natal chart, is an astrology chart based on the date, time, and place of birth.

What are the big three in astrology?

The big three are the sun sign, moon sign, and rising sign. These are often used as a quick summary of a person’s astrology profile.

Do I need my birth time?

Yes for the best result. Birth time is especially important for rising sign and can also matter for moon sign.

Is this birth chart calculator exact?

This is an estimate. Exact charts use precise ephemeris data, full birth location, daylight saving time rules, and historical time zone records.