The Astrolium Midheaven calculator finds your MC sign and 10th house from birth data, then reads what they say about career direction, vocation, and public reputation. The Midheaven (Medium Coeli, MC) sits at the highest point a planet reaches in its daily arc through the sky and marks the cusp of the 10th house of career and public role.
The MC depends on the Earth's rotation, so an accurate birth time and location are required. The sky rotates roughly 1 degree every 4 minutes, which means a 15 minute error in birth time can shift the MC by almost 4 degrees and sometimes across a sign boundary. Drop your birth data into the form to get the MC longitude, the sign on the cusp, and the planetary ruler that carries the 10th house theme across the rest of your chart.
Astrolium's Midheaven calculator finds the MC longitude, the sign on the cusp, and the planetary ruler of the 10th house from a native's birth date, time, and place. The MC (Medium Coeli) is the highest point a planet reaches in its daily arc and the cusp of the 10th house in Placidus, Koch, Porphyry, and Regiomontanus systems. In Whole Sign houses the MC may fall in a different house from the 10th, and the tool flags this condition explicitly. Output includes the MC sign, degree, ruling planet by sign and house, and a reading on vocation, public reputation, and the kind of work the native becomes known for. Birth time must be exact, since the MC shifts roughly 1 degree every 4 minutes. Calculations use Swiss Ephemeris with sub-arcsecond accuracy. Free, no account required.
The progressed MC advances about 1 degree per year, so checking your progressed chart tells you whether your public role has crossed a sign boundary since birth. The Saturn return calculator covers the 29 years career timing window, and the part of fortune calculator pairs well with the MC reading.