Astrology & Numerology Calculators

Why these calculators?

The internet is full of astrology and numerology calculators that return vague, generic, or wrong results. We built ours to do the opposite. Each tool on this page uses the exact mathematics professional astrologers and numerologists have used for centuries: Pythagorean reduction for numerology, Swiss Ephemeris calculations for astrology, and returns interpretations written in clear English, not copy-pasted from a template database.

The astrology tools can all be used individually on this page, but they are designed to be combined. Your birth chart is the foundation. Your rising sign is one layer of that chart. Compatibility and synastry show how two charts interact. Transits show what the sky is doing to your chart right now. Read together, they tell a coherent story.

The numerology tools follow the same logic. Life path is your mission. Expression is the toolkit you arrived with. Personal year is the theme of the current chapter. Karmic debt reveals what unfinished business your soul is working through. Four numbers, one integrated reading.

All nine tools are free

Yes, really. No trial, no credit card, no "sign up to unlock." We built Karmastro on the belief that the cosmic tools that have helped people for thousands of years should be freely accessible. The paid tier of Karmastro exists for people who want to go deeper with one of our four cosmic guides (Sibylle, Orion, Séléné, Pythia), but the calculators themselves are free forever.