About MyArcana

MyArcana is a free astrology site. You can calculate a natal chart, a destiny matrix, a compatibility matrix, and an astrocartography map, check today's moon phase, or read a daily moon horoscope. There's also a wiki on planets, zodiac signs, houses, tarot arcana, and astrocartography lines, plus a growing collection of articles.

None of the calculators require an account to see your basic result.

Try the tools:Natal ChartDestiny MatrixCompatibilityAstrocartographyMoon PhasesHoroscopeAstro WikiArticles

Who Runs This Site

MyArcana is built and maintained by a small independent team. This isn't a site where we wired up an AI and called it astrology. The calculators are our own: the calculation engines, the scoring logic, and the interpretation frameworks were all built and refined by hand, and we've been sharpening them since the start of 2025.

Getting the accuracy right was the hardest part, and the one we care about most. We read our way through dozens of books and primary sources, ran the numbers across thousands of test charts, and checked our output point by point against every major professional astrology calculator until the results lined up consistently. For the interpretive side, we cross-referenced established astrological literature with how experienced practitioners actually read a chart, including long-running discussions on Reddit and dedicated astrology forums, rather than leaning on any single source.

The site runs on ad revenue (Google AdSense): that's what pays for hosting and keeps every tool free, with no subscription.

How the Calculations Work

Planet Positions

We calculate planet positions with the Swiss Ephemeris, the same astronomical library used by most professional astrology software. Enter your birth date, time, and place, and we compute where the Sun, Moon, planets, and key points (Ascendant, Midheaven, Lunar Nodes, Lilith, Chiron) were at that exact moment.

House System

Placidus is the default house system, since it's the most widely used in Western astrology. For extreme latitudes where Placidus can't resolve, we fall back through Koch, Regiomontanus, Campanus, and Equal House so you still get a valid chart. Right now the house system and aspect orbs are fixed and the same for every user; we plan to add personal customization later.

Dominant Planets and Elements

A chart is more than a list of positions, so we score each one for its dominant planets and elements using a weighted system: essential dignity (rulership, exaltation, fall, detriment), angular placement, closeness to the Ascendant and Midheaven, chart rulership, and the full network of aspects a planet forms. We tuned these weights against how leading calculators emphasize the same charts, so what stands out reflects the whole chart rather than just the Sun sign.

What Affects Accuracy

Your exact birth time matters. Without it, we can still tell you the planets' signs, but the Ascendant, Midheaven, and house cusps won't be reliable: those need a precise time to calculate.

Where AI Is Involved

Chart Interpretations

The astrological meaning behind a placement, an arcana, or a matrix energy is ours: drawn from dozens of books and our hands-on experience, not invented by a model. We build our AI prompts on top of that research. Some of the text, like the Destiny Matrix, Compatibility, and moon horoscope blocks, is generated by AI ahead of time, and a person checks every result for factual errors before it goes live. Natal chart and astrocartography readings are generated the instant you click, under the same rules, but without a manual check on each individual result, since they're generated on the spot. We use language models from Anthropic (Claude) and Google (Gemini) for this layer. Treat any reading as a starting point for reflection, not as professional advice.

Wiki and Articles

Wiki entries and blog articles follow the same principle: the substance is researched and structured by us, AI helps draft and polish the wording, and everything is reviewed before it's published. Versions in languages other than the original are produced by AI translation, so some pages may read slightly less naturally than the source.

Your Data

You don't need an account to use the calculators, and each result is saved locally on your own device rather than tied to a profile. We don't sell your birth details or use them to identify you. For the full picture on cookies, analytics, and advertising, read our Privacy Policy.

Disclaimer

MyArcana is intended for entertainment and self-reflection. Astrological, matrix, and tarot readings are not a substitute for professional advice: medical, psychological, financial, or legal. For decisions in those areas, please consult a qualified professional.

Found a Mistake?

If something in a calculation looks wrong, or you have a question about how the site works, reach us through the contact page.