Every calculator below is a view into the same calculation: a full chart from your date, time and place. Pick the factor you are curious about, read the example, then build your own chart to see it in context.
Chart factors
| Calculator | What you get | What it needs |
|---|---|---|
| Rising sign | The Ascendant's sign and degree, distance to the sign boundary. | Needs a reliable birth time |
| Moon sign | The Moon's sign and degree, its house and aspects. | Date gives the sign; the house needs a time |
| Sun, Moon and Rising | The three starting points side by side. | Needs a reliable birth time |
| Venus sign | Venus by sign, house, motion and aspects. | Date gives the sign; the house needs a time |
| Mars sign | Mars by sign, house, motion and aspects. | Date gives the sign; the house needs a time |
| Mercury sign | Mercury's placement and natal retrograde status. | Date gives the sign; the house needs a time |
| Chart ruler | The planet ruling the Ascendant's sign, and its placement. | Needs a reliable birth time |
| North Node | The true node by sign and house, and the opposite point. | Date gives the sign; the house needs a time |
| Part of Fortune | The calculated point and the formula behind it. | Needs a reliable birth time |
| Fixed stars | Star contacts within 1.5° of a natal body, from a 69-star catalogue. | Date and place are enough |
| Elements and modalities | The chart's balance by element and modality, with the counting rule. | Date and place are enough |
| Chiron | Chiron by sign, house and aspects. | Date gives the sign; the house needs a time |
| Lilith | The osculating lunar apogee by sign, house and aspects. | Date gives the sign; the house needs a time |
Demonstration birth: 1991-09-06 at 18:30 local time, Kyiv, Ukraine (50.4501° N, 30.5234° E), Europe/Kyiv at UTC+3, so 1991-09-06 15:30 UTC. Tropical zodiac, Placidus houses, Swiss Ephemeris 2.10.03. Full result and settings on How to verify your birth chart.
Tools that use the whole chart
- Compatibility (synastry): Two charts compared aspect by aspect, six spheres scored.
- Live transits: The sky now against your chart.
- Year ahead (Solar Return): The chart of your next birthday year.
- Best timing: Dates scored for one activity (iPhone app).
- Relocation: How a city moves your angles.
Before you compare results elsewhere
Two calculators disagree most often because of settings, not arithmetic: the historical timezone offset, the zodiac (tropical here), the house system (Placidus here) and which Lilith or node variant is used. How to verify your birth chart walks through a reproducible example with every setting stated, and how to find your birth time covers the input that matters most.