Mysticism calculators

Birth Chart Calculator

Updated Oct 12, 2026 By Infinity Calculator
Personal Information
Birth Date & Time
If unknown, we default to 12:00 Noon — Rising sign & house data will be omitted.
Birth Location
Type the town or city where you were born and pick it from the suggestions.
Place data adapted from GeoNames (CC BY 4.0).

Birth Chart

Your Big Three
Natal Chart Wheel
Planetary Positions
BodySignDegreeLongitudeHouse
Element & Modality Balance

Introduction

A birth chart is a map of the sky from the moment you were born. It shows where the Sun, Moon, planets, and stars were at that time. In astrology, this map is read as a guide to your traits, your moods, and the way you act.

This birth chart calculator makes it easy to find out yours. Just type in your birth date, your birth time, and the city where you were born. The tool runs the calculations and shows your results fast.

You will see your Big Three: your Sun sign, Moon sign, and Rising sign. In astrology, the Sun sign shows who you are at your core. The Moon sign shows your feelings. The Rising sign shows how others see you. You will also get a full chart wheel, a table of all your planet spots, and a look at your element and modality balance.

If you do not know your birth time, that is okay. You can still get most of your chart. Just check the box that says you do not know it. Try it now and learn more about yourself.

How to use our Birth Chart Calculator

Enter your birth date, time, and city. The calculator shows your Sun, Moon, and Rising signs, all your planet positions, a natal chart wheel, and your element and modality balance.

Type your name in the Name box. This is optional and just adds your name to your chart title.

Pick your pronouns by tapping He/Him, She/Her, or They/Them.

Choose your birth month, day, and year from the drop-down menus.

Pick the hour and minute you were born. If you do not know your birth time, check the "I don't know my birth time" box. We will use 12:00 Noon and skip your Rising sign and houses.

Start typing the town or city where you were born, then pick it from the suggestions. This sets your location and the local clock time on your birth date, daylight saving included.

Click "Calculate" to see your results. Click "Reset" to go back to the example chart.

What Is a Birth Chart?

A birth chart is a map of the sky from the moment you were born. It shows where the Sun, Moon, and planets sat in the zodiac at your exact birth time and place. Many people use it to learn more about themselves in astrology.

Your Big Three

The three most talked-about parts of a chart are your Sun sign, Moon sign, and Rising sign. Here is what each one means:

  • Sun sign: Your core self and the way you shine. This is the sign most people already know.
  • Moon sign: Your feelings and your inner world. It shows how you deal with emotions.
  • Rising sign: Also called the Ascendant. It is the sign that was coming up over the east when you were born. It shows how others first see you.

Why Birth Time Matters

Your Rising sign and house spots change fast through the day. So you need your birth time to find them. If you do not know your time, you can still see your Sun, Moon, and planet signs. But the Rising sign and houses will be left out.

The 12 Zodiac Signs

There are 12 signs: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. Each sign has an element (Fire, Earth, Air, or Water) and a way of acting called a modality (Cardinal, Fixed, or Mutable). Astrologers read the balance of these as a picture of your style.

Planets and Houses

In astrology, each planet rules a part of life. For example, Venus is tied to love and Mars is tied to drive. The houses are 12 slices of the chart that show where these energies play out, like work, home, or friends. Together, the planets, signs, and houses make your full birth chart unique to you.


Formulas used

Julian Day Number 4
JD = \lfloor 365.25\,(y+4716) \rfloor + \lfloor 30.6001\,(m+1) \rfloor + d + B - 1524.5 + \frac{h_{UT}}{24}
Julian Centuries from J2000 3
T = \frac{JD - 2451545.0}{36525}
Sun Longitude (Meeus)
\lambda_{\odot} = L_0 + C, \quad L_0 = 280.46646 + 36000.76983\,T, \quad C = 1.9146\sin M + 0.02\sin 2M + 0.0003\sin 3M
Geocentric Planet Longitude (Keplerian)
\lambda_{geo} = \operatorname{atan2}(y_p - y_E,\; x_p - x_E) + 1.3966\,T
Ascendant
ASC = \operatorname{atan2}\!\left(\cos\theta_{RAMC},\; -\bigl(\sin\theta_{RAMC}\cos\varepsilon + \tan\phi\,\sin\varepsilon\bigr)\right)
Midheaven (MC)
MC = \operatorname{atan2}\!\left(\sin\theta_{RAMC},\; \cos\theta_{RAMC}\cos\varepsilon\right)
Greenwich Mean Sidereal Time
\theta_0 = 280.46062 + 360.98565\,(JD - 2451545.0) + 0.000388\,T^2, \quad 280.46062 \approx 15 \times 18.697374558,\; 360.98565 \approx 15 \times 24.06570982441908 \text{ (GMST in hours} \times 15)
Equal House Assignment
H = \left\lfloor \frac{(\lambda - \lambda_{ASC}) \mod 360^\circ}{30^\circ} \right\rfloor + 1

Frequently asked questions

What is element and modality balance?

Each sign has an element (Fire, Earth, Air, or Water) and a modality (Cardinal, Fixed, or Mutable). The charts count how many of your planets fall in each one. Astrologers read this as your style, like whether you lean more emotional, grounded, or active.

Why did my Rising sign get left out?

Your Rising sign changes fast through the day, so it needs an exact birth time. If you checked the box that says you do not know your time, the tool skips the Rising sign and houses. Add your time to see them.

What are houses in a birth chart?

Houses are 12 slices of the chart that show where life happens, like work, home, love, or friends. Each planet falls in a house. In astrology, this is read as the part of your life that planet's energy affects most.

What is the North Node and South Node?

The Nodes are the two points where the plane of the Moon's orbit crosses the ecliptic, the Sun's yearly path across the sky.2 Many people link the North Node to growth and the road ahead. The South Node sits across from it and is linked to past habits and gifts you already have.

This chart shows the mean nodes: the average position of the nodes, rather than their day-to-day true position, which wobbles around it.

Why does my Sun sign look different from a horoscope app?

Most apps use set date ranges. In fact, the start and end dates of each sign fall within about a day of a major solar term.1 This tool finds the real Sun spot for your birth day, time, and place. If you were born near the edge of two signs, your true Sun sign may differ. Our result is more exact.

Can I use this if I was born in a southern country?

Yes. The tool works for towns and cities all over the world, north and south. It even adjusts daylight saving time for southern places like Australia, where the seasons are flipped. Just type your birthplace and pick it from the suggestions.

What does the degree number next to a planet mean?

The zodiac splits the Sun's yearly path, measured in 360 degrees of longitude, into 12 equal signs.1 So each sign covers 30 degrees. The degree shows how far into a sign a planet sits, like 14 degrees of Leo. A low number means early in the sign and a high number means near the end.


Sources

  1. The 24 Solar Terms. Hong Kong Observatory. The 24 Solar Terms and the 12 Zodiac Constellations. Accessed September 29, 2026.
  2. Astronomical Applications Glossary. U.S. Naval Observatory, Astronomical Applications Department. ecliptic; node. Accessed September 29, 2026.
  3. Computing Greenwich Apparent Sidereal Time. U.S. Naval Observatory, Astronomical Applications Department. Computing GAST (T = D_TT / 36525). Accessed September 29, 2026.
  4. NOAA Solar Calculator program code (main.js). NOAA Global Monitoring Laboratory. functions getJD, calcGeomMeanLongSun, calcSunEqOfCenter, calcSunApparentLong. Accessed October 10, 2026.