Free astrology tools

Free astrology calculators

Find your rising, Moon and Venus signs, or your big three, in seconds. Every calculator is free, uses real astronomy and runs in your browser.

• Rising sign calculatorYour ascendant: the first impression you give and the way you meet a new person. Needs birth time and place.
• Moon sign calculatorYour emotional needs and what makes you feel safe and cared for. Works even without a birth time.
• Venus sign calculatorHow you love, flirt and show affection, and what you find beautiful. Only needs your birth date.
• Big three calculatorYour Sun, Moon and rising sign together: the core trio most astrologers read first.

How the calculators work

Each tool calculates planetary positions with astronomy-engine, an open source astronomy library, from your birth date, and from your birth time and place when they are needed. Times are converted to universal time with the historical time zone rules for your birth city. Nothing is sent to a server: your birth data stays on your device.

Your sun sign is only the start. Once you know your own placements, compare them with a partner's in a full synastry chart to see how your Moons, Venus and Mars signs interact.