Moon Phase Calculator
Choose a date to explore the Moon phase, illumination context, and a clear visual summary without requiring a full birth chart.
ASTROTRIO roadmap
More tools coming soon
A growing astrology toolkit, designed one useful tool at a time.
ASTROTRIO is expanding beyond the Big 3 calculator with focused tools that are fast, mobile-friendly, transparent about their inputs, and easy to understand. We are not publishing release dates until each tool is ready.
Moon
Venus
Mars
Chart
In the roadmap
What we are preparing next.
Each upcoming tool will have its own explanation, methodology notes, and responsive result experience before it is marked available.
Venus Sign Calculator
Calculate the zodiac sign of Venus for a birth moment, with a concise guide to the symbolism traditionally associated with Venus.
Mars Sign Calculator
Find the natal Mars sign and view a simple breakdown of sign, degree, element, and interpretive themes.
Mercury Sign Calculator
Explore Mercury's zodiac position for a selected birth moment alongside plain-language context about communication symbolism.
Birth Chart Snapshot
A broader at-a-glance view of major natal placements, designed as a next step after the Sun, Moon, and Rising calculator.
Compatibility Explorer
A side-by-side comparison experience intended to explain selected placements without reducing relationships to a single score.
How we ship tools
Useful first. Clear about limitations. Comfortable on a phone.
Every ASTROTRIO calculator is planned around a small set of standards: clear inputs, transparent methodology, responsive controls, readable results, and no unnecessary account wall. When a result depends strongly on exact birth time or location, the tool will say so.
Mobile first
Forms and results are designed to work comfortably on narrow screens and touch devices.
Method explained
Where calculations are involved, ASTROTRIO documents the method and important accuracy limits.
No fake launch dates
Upcoming tools stay marked as planned until they are genuinely ready to use.
Available today
Calculate my Big 3
Your Big 3 calculator is already live.
Start with your Sun, Moon, and Rising signs while the next ASTROTRIO tools are being prepared.