Real astrology math, in your browser.
Every calculator here runs on the same planetary data professional astrologers use — computed locally, with nothing you type ever leaving the page. No account, no email.
Why these are more than a sun sign
Most free astrology sites sort you into one of twelve boxes by your birthday. Your real chart is a snapshot of the whole sky at the moment you were born — ten moving bodies, each in a sign and a house, plus the ascendant rising on the eastern horizon. These tools compute that snapshot properly. Start with the birth chart calculator for the full picture, or pull out a single placement with the Moon and rising sign calculators.
New to any of it? The Learn guides explain every sign, planet, house and aspect in plain English — no gatekeeping.