Birth Chart Calculator: Sun, Moon, Rising and Full Natal Chart

Your sun sign is one line of a much longer story. The moment you were born, the sky held a pattern that has never repeated: ten planets spread across twelve signs, twelve houses turning with the hour, and a web of angles between them. A birth chart, also called a natal chart, is that pattern drawn on a wheel. The calculator above draws yours in seconds. This page explains what you are looking at and where to start reading.

What Your Birth Chart Shows

The first thing to read is your big 3: the sun sign for who you are, the moon sign for what you feel, and the rising sign for how the world meets you. Our guide to the sun, moon, and rising signs explains how the three work together, and our rising sign guide and moon sign guide go deeper into each.

Then come the planets, each governing a part of life. Your Mercury sign shapes how you think and talk, your Venus sign shapes how you love, your Mars sign drives how you act, your Jupiter sign shows where your luck grows, and your Saturn sign names your life's biggest lessons. Our guide to the planets in astrology introduces the whole cast, including Uranus, Neptune, and Pluto, the slow outer planets that color an entire generation, and your North Node, the point that shows where your life is asking you to grow.

The chart also shows houses, the twelve areas of life each planet lands in, and aspects, the angles between planets that describe how they get along. A trine flows, a square creates friction that builds strength, and a conjunction fuses two energies into one. The tables above list all of them for your chart, with the house system set to Placidus, the default most professional astrology software uses.

What You Need to Calculate Your Birth Chart

Three things: your birth date, your birth time, and your birthplace. The date sets the sun and the slow planets. The time sets the moon's exact degree, the rising sign, and every house, because the sky turns a full sign roughly every two hours. The place sets the horizon the chart is drawn from and the time zone, and the calculator handles daylight saving time for the year you were born automatically once you choose your city.

If you do not know your birth time, tick the box and the calculator runs the chart at noon. Your sun sign, your planet signs, and in most cases your moon sign will still be correct; the rising sign and houses will not, since they depend on the hour. A birth certificate or hospital record usually has the time, and it is worth the phone call to a relative. The rising sign is the piece that makes a chart feel like you.

How This Calculator Works

The calculator runs entirely in your browser on a professional astronomical engine that computes where each planet actually was, seen from Earth, at your birth moment. It converts your local birth time to universal time using your birthplace's time zone rules, calculates the apparent positions of the sun, moon, and planets, finds your ascendant and midheaven from your latitude and longitude, and lays out the houses using the Placidus system. Nothing you enter is stored on this page or sent anywhere except, if you choose, your email address to receive your chart insights.

Reading Your Chart: Where to Start

Start with your big 3 and read the guides for each. Then look for the sign that appears most in your chart, since a crowded sign, called a stellium, tells you where your energy concentrates; the calculator flags one for you when it finds it. Notice any planet marked retrograde, which points to an area of life you tend to process inwardly. And keep an eye on the sky's current weather: the zodiac seasons and eclipses touch every chart differently depending on where they land in yours. If numbers are more your language than planets, our life path calculator reads your birth date a different way.

Frequently Asked Questions

What is a birth chart?

A birth chart, or natal chart, is a map of where the sun, moon, and planets were in the sky at the exact time and place you were born. Astrologers read it as a portrait of your personality, your strengths, and the themes of your life.

Do I need my exact birth time?

For your rising sign and houses, yes, because they change roughly every two hours. Your sun sign and planet signs only need your birth date. If you do not know your time, tick the box and you will still get an accurate sun, moon, and planetary chart.

How accurate is this birth chart calculator?

It uses a professional astronomical engine to compute actual planetary positions for your birth moment, converts your local time using your birthplace's time zone rules including daylight saving, and uses the Placidus house system that most professional astrology software uses by default.

What are the big 3 in astrology?

Your sun, moon, and rising signs. The sun is your core identity, the moon is your emotional world, and the rising sign is the impression you make. Together they explain why two people with the same sun sign can feel completely different.

What is the difference between a birth chart and a horoscope?

A birth chart is fixed: it describes the sky at your birth and never changes. A horoscope describes how the current sky is moving in relation to your chart. Reading a horoscope well starts with knowing your birth chart.