Midheaven Calculator
Your Midheaven (MC) is the degree of the zodiac that was crossing the meridian, high in the sky, at the moment you were born. Find its sign and exact degree, the IC opposite it, the planet that rules it and where that planet sits in your chart.
- The ruler of your MC, and where it sits
- Degrees checked against astro-seek
What is the Midheaven?
The meridian is the line that runs from due north to due south through the point straight overhead. As the Earth turns, every degree of the zodiac crosses it once a day, and the one crossing it when you were born is your Midheaven. Outside the tropics it lies due south in the northern hemisphere and due north in the southern, partway up the sky.
It is not necessarily the highest point of the zodiac above you. That is the nonagesimal, the degree ninety degrees from the Ascendant, which can sit well away from the MC. The Midheaven is defined by the meridian, which is why it marks the top of the chart: in most house systems it is where the 10th house begins.
Together with the Ascendant, the Descendant and the IC, the Midheaven is one of the four angles of the chart. The angles are the most time-sensitive points in astrology. The planets barely move in an hour; the angles move through a sign in about two hours, which is why the Midheaven needs your birth time and the planets' signs usually do not.
The Midheaven and the IC
The MC has an opposite end, and the two are read as one axis.
The Imum Coeli, "the bottom of the sky", is the degree exactly opposite your Midheaven: the point of the zodiac crossing the meridian beneath your feet. It begins the 4th house and is read as roots, home, family and private life, the base the public life stands on.
Because they are always opposite, the MC and IC are in opposite signs at the same degree. A Midheaven at 14° Capricorn has an IC at 14° Cancer. Read together, they describe the pull between the life you show and the life you come home to, and the calculator gives both.
Is the Midheaven the same as the 10th house?
In Placidus, the house system ChartNova uses by default and astro-seek uses by default, the Midheaven is the cusp of the 10th house: the 10th starts exactly at the MC. The same is true of Koch, Regiomontanus, Campanus and Porphyry, so the MC degree does not change when you switch between them.
In whole sign houses it can differ. There the 10th house is simply the tenth sign counted from your rising sign, and the Midheaven can fall in the 9th, 10th or 11th house. In equal houses the 10th cusp is 270° from the Ascendant, and the MC moves freely against it. If another site shows a different 10th house cusp but the same MC, this is almost always why.
Above the polar circles Placidus houses cannot be drawn at all for many birth times. The calculator then uses Porphyry houses and says so; the Midheaven itself is unaffected.
How long each sign holds the Midheaven
The MC crosses the zodiac in one sidereal day, but not at an even pace through the signs.
The sky turns at a steady rate along the equator, not along the zodiac. Signs either side of the equinoxes cross the meridian at a slant and pass quickly; signs either side of the solstices cross it nearly square and take longer. The difference follows from the tilt of the Earth's axis alone, so unlike the Ascendant, whose rising times change with latitude, these times are the same wherever you were born.
| Sign on the MC | Time on the meridian |
|---|---|
| ♈︎Aries | 1 h 51 min |
| ♉︎Taurus | 1 h 59 min |
| ♊︎Gemini | 2 h 08 min |
| ♋︎Cancer | 2 h 08 min |
| ♌︎Leo | 1 h 59 min |
| ♍︎Virgo | 1 h 51 min |
| ♎︎Libra | 1 h 51 min |
| ♏︎Scorpio | 1 h 59 min |
| ♐︎Sagittarius | 2 h 08 min |
| ♑︎Capricorn | 2 h 08 min |
| ♒︎Aquarius | 1 h 59 min |
| ♓︎Pisces | 1 h 51 min |
Clock time for the whole sign, computed from the obliquity of the ecliptic. On average the MC moves one degree every four minutes, so a birth time out by a quarter of an hour moves it by three or four degrees.
The Midheaven in each sign
A first line for each sign. The calculator gives the full reading for yours, with the ruler's placement beside it.
♈︎ Aries
Known for initiative: the one who starts things and leads from the front.
♉︎ Taurus
Known for reliability: work of lasting quality, built steadily.
♊︎ Gemini
Known for ideas and words: teaching, writing, linking people.
♋︎ Cancer
Known for care: work that protects, feeds or remembers.
♌︎ Leo
Known by name: visible, creative work that is recognisably yours.
♍︎ Virgo
Known for competence: improving, analysing, getting it right.
♎︎ Libra
Known for fairness: negotiating, designing, representing others.
♏︎ Scorpio
Known for depth: research, finance, therapy, what lies beneath.
♐︎ Sagittarius
Known for horizons: teaching, publishing, travel, meaning.
♑︎ Capricorn
Known for responsibility: authority earned through long effort.
♒︎ Aquarius
Known for change: ideas, systems and causes ahead of their time.
♓︎ Pisces
Known for imagination: art, healing and work that serves.
The ruler of your Midheaven
Every sign has a ruling planet, and the planet ruling the sign on your MC is read as the engine of your vocation. Where it sits by sign and house often says more about the shape of a career than the MC sign itself: a Midheaven ruler in the 7th house points to work through partners, in the 9th to teaching or travel, in the 12th to work done out of sight.
For three signs there are two rulers. Before Uranus (1781), Neptune (1846) and Pluto (1930) were discovered, Aquarius was ruled by Saturn, Pisces by Jupiter and Scorpio by Mars. The calculator names the modern ruler first, as ChartNova's rising sign calculator does, and shows the traditional ruler with its own placement, so you can read whichever your astrology uses.
Why your birth time matters
The planets move slowly enough that a birth date alone usually fixes their signs. The Midheaven does not: it goes all the way round the zodiac every day. A birth time out by an hour can move it half a sign, and near the boundary between two signs, a few minutes decide which one you have.
Without a birth time the calculator does not guess from noon. It lists every sign the Midheaven held on the day you were born, with the local clock times for each, and the reading for each sign. If you know the time roughly, morning or evening, you can usually narrow it to one or two. If the time on your certificate is rounded to the hour, the MC degree should be read as approximate.
Time zones matter as much as the time. The calculator converts your birth time with the time zone database for your birthplace, including daylight saving time on the date you were born.
How to use the Midheaven calculator
- 1Enter your birth date, time and placeType your birth city and pick it from the list; the time zone is found for you. The birth time is what decides the Midheaven, so use the most exact one you have.
- 2Read your MC, IC and the MC rulerThe result gives the sign and degree of your Midheaven and IC, the ruler of the MC with its sign and house, the planets in your 10th house and any planet within five degrees of the MC.
- 3Check it, then go furtherCompare the degree with any other calculator, astro-seek included. Then open the career reading, which reads the MC with the other placements a career question needs.
Your Midheaven is one part of your chart
The free birth chart shows it with every planet, house and aspect, to the minute.