BROWSE CALCULATORS
Free Astrology Calculators
Explore 10 focused tools for Sun signs, Moon phases, Pythagorean names and relationship preferences, without duplicating paid synastry.
Choose your calculator
Love Calculator
Compare how two people describe six relationship preferences including communication, planning, space, conflict, affection and social time.
Love Calculator by Name
Explore a playful name-based numerology comparison using the classic Pythagorean A-to-I cycle for two names.
Name Calculator for Numerology
Calculate the expression, soul-urge and personality numbers associated with a personal name in Pythagorean numerology.
Zodiac Compatibility Calculator
Compare two Sun signs through elemental and modality symbolism, without free synastry percentages.
Love Compatibility Calculator
Explore romantic communication and affection preferences without calculating planetary synastry.
Birth Date Compatibility Calculator
Identify two Sun signs from birthdays and compare traditional zodiac elements without a synastry score.
Moon Phase Soulmate Calculator
Compare lunar phases at two birthdays and see whether they form a complementary pattern.
Marriage Compatibility Calculator
Compare practical expectations about long-term commitments, household responsibilities and decision-making.
Soulmate Compatibility Calculator
Explore shared priorities and ideas about a meaningful bond with four grounded relationship questions.
Friendship Compatibility Calculator
Compare friendship habits through actual preferences for contact, activities, support and boundaries.
Your Full AstroSynth Report
Compare more birth-chart factors and explore personalized relationship themes. A separate paid service.
Find the right astrology calculators
Our astrology calculators directory is organized around distinct questions rather than multiple copies of one result. Sun-sign categories sit alongside birthday-to-sign tools, Moon phases, name-number conventions and practical preference comparisons. Every card opens its own tool immediately so the visitor does not need to read a long article before beginning.
Choose from the astrology calculators directory above and follow each page’s instructions. Your free result is presented before any invitation to explore a premium report. Any approximate lunar calculation is labeled, while direct preference tools show only the inputs people supplied.
What makes the astrology calculators useful?
These tools serve different free intents. Moon phases use two birthdays, Sun-sign tools use dates or sign selections, and preference comparisons rely on independently completed answers. The astrology calculators can spark conversation, but no astrology result should be treated as scientific proof of compatibility.
Continue with a birth-chart report
AstroSynth offers an optional, separate premium report when you want a broader traditional synastry interpretation. These astrology calculators remain free and accessible whether or not you follow a report link. Review the methodology before deciding how much weight to give any score or symbolic reading.
Compare traditional Sun-sign categories with a lunar-phase calculation or a two-person preference checklist. The method and limitations appear below each tool.