1st House Astrology Calculator
The 1st house is the house of self. Enter your birth details to get the sign on that cusp, the Ascendant, and any planets inside the house.
Calculating…
—
Calculated from your birth moment. Astronomy stays fixed.
Other placements at birth
The house of the self
The 1st house covers how you enter a room: body, style, and the first impression you leave. The sign on the cusp is the Ascendant. Planets here color that approach with their own topics. The rest of the natal chart shows how the cusp sits with your Sun and Moon. The rising sign calculator isolates the Ascendant if that is all you need.
Why the birth time matters
The 1st house cusp is taken from the eastern horizon at your birth place, in the Placidus system. It needs the date, the clock time, and the city. The Ascendant moves about one degree every four minutes, so a wrong time moves the cusp, and near the edge of a sign it can change the sign. If the time is unknown, noon is only a stand-in.
Frequently asked questions
Is the 1st house the same as my rising sign?
The sign on the 1st house cusp is your Ascendant, also called the rising sign. This calculator also lists planets inside the 1st house. The dedicated rising sign calculator focuses on the Ascendant degree alone.
Why does this calculator need my birth time?
House cusps follow the horizon, and the horizon turns with the Earth. An hour off can put the 1st cusp in another sign. When the time is missing, the calculator uses noon, and that result is only approximate.
What do planets in the 1st house mean?
Planets in the 1st house sit in the house of self. They often show traits people notice early: a 1st-house Mars can look direct; a 1st-house Moon can look openly emotional. The cusp sign still sets the baseline tone.