Free Zodiac Compatibility Calculator for all 12 signs.
What is this? A free zodiac compatibility calculator that measures how well two sun signs match across love, communication, trust, and intimacy. Enter your date of birth to auto-detect your sign and unlock a numerology-enhanced reading — or simply pick your signs manually. Covers all 144 zodiac pairings. No sign-up required.
What is a zodiac compatibility calculator?
A zodiac compatibility calculator is a free tool that measures how well two sun signs match in love, communication, trust, and intimacy. Our calculator analyzes all 144 possible zodiac pairings and returns a percentage score with four sub-scores. Enter your date of birth for a richer reading that includes life path numerology.
What our calculator measures
- Element harmony — Fire, Earth, Air, and Water signs interact in predictable ways. Fire and Air are mutually energizing; Earth and Water are mutually nourishing.
- Modality balance — Cardinal signs initiate, Fixed signs sustain, Mutable signs adapt. Two Fixed signs together create powerful loyalty but can resist change.
- Ruling planet — Venus-ruled signs (Taurus, Libra) handle love differently than Mars-ruled Aries or Pluto-ruled Scorpio.
- Aspect distance — the angle between two signs on the 360° zodiac wheel. Trines (120° apart) flow easily; squares (90° apart) create growth-through-friction.
- Life path numerology (DOB) — When you enter a date of birth, your life path number is calculated and used as a compatibility modifier, adding nuance beyond sun-sign alone.
Why enter your date of birth?
Your date of birth does two things: it auto-detects your zodiac sign so you don’t have to guess, and it calculates your life path number — a core numerology concept that reflects your underlying personality driver. When both partners’ life path numbers are compared, certain combinations amplify compatibility (1+9, 2+6, 3+3, 4+8) while others highlight friction (1+4, 5+5, 6+9). We add this as a ±5% modifier to your overall reading.
How does this zodiac compatibility calculator work?
From two dates of birth to a full reading in under five seconds.
Enter your dates of birth
Type in both dates and your zodiac signs are auto-detected instantly. Your life path numbers are calculated in the background for a richer reading. Or simply pick signs manually — both work.
The algorithm runs
Element harmony, modality balance, ruling planet dynamics, aspect distance, and — when DOBs are provided — life path number compatibility are all combined into an overall percentage.
Read your full report
Four sub-scores (Love, Communication, Trust, Intimacy), three vibe descriptors, a numerology panel, and written analysis of where you click and where you clash.
The methodology behind our compatibility engine.
Element Harmony
The foundation score. Same-element pairings score 84–91%; compatible elements (Fire+Air, Earth+Water) score 86–92%; clashing elements score 64–71%.
Modality Dynamics
Two Fixed signs lock heads (−5). Cardinal + Mutable flows freely (+4). This layer prevents the engine from flattening all same-element pairs.
Aspect Angle
Trine (120°): +7. Sextile (60°): +3. Conjunction (0°): +4. Opposition (180°): +5. Square (90°): −2. The wheel is geometry as much as mythology.
Life Path Numbers
When dates of birth are provided, numerology compatibility adds a ±5% modifier. Harmonious life path pairs (1+9, 2+6, 3+3) receive a bonus; friction pairs receive a penalty.
All 144 zodiac compatibility pairings at a glance.
Every cell is a real reading. Hover for the score, click to load the full report for that pairing.
The most compatible zodiac signs people are checking right now.
Trending zodiac sign pairings, ranked by reading volume across the site.
What does the compatibility percentage actually measure?
A single percentage flattens a whole relationship. We break it into five frequencies.
Zodiac love compatibility
How your romantic instincts collide, complement, or cancel each other out.
Communication style
Whether you can finish each other’s sentences — or just interrupt them.
Trust & intimacy
The depth of emotional and physical safety between you.
Shared values
What you both treat as sacred — and where your priorities diverge.
Long-term potential
The view ten years out. Some sparks last; some are built for short stories.
Today’s zodiac horoscope for all 12 signs.
Daily horoscope readings updated every morning.
What people are saying about our zodiac compatibility readings.
I entered our birthdays and the life path section called us out perfectly. My therapist agreed.Maya R. ♋ Cancer
The date of birth feature is a game changer. It found a pattern my partner and I had been ignoring for years.Dom A. ♈ Aries
Finally a free zodiac compatibility calculator that writes like a real person and not a fortune cookie at scale.Priya M. ♍ Virgo
Got Sagittarius & Gemini at 91% and it explained exactly why we fight at IKEA. Worth it.Theo L. ♐ Sagittarius
Long reads on zodiac signs & compatibility.
Scorpio and Taurus compatibility, explained without the drama.
Why opposite signs feel like coming home and slamming the door at the same time.
Virgo zodiac compatibility — the most-misunderstood archetype.
They are not picky. They have just done the spreadsheet.
How to read a zodiac compatibility report without spiraling.
A practical, slightly-skeptical guide to taking what is useful and leaving the rest.
Zodiac compatibility calculator frequently asked questions.
Everything people ask about zodiac compatibility, percentages, accuracy, and how our calculator works.
A zodiac compatibility calculator measures how well two sun signs match across love, communication, trust, and intimacy. Our version also accepts dates of birth to auto-detect signs and factor in life path numerology for a more complete reading.
No — entering a date of birth is optional. If you do, you get two bonuses: your zodiac sign is detected automatically, and life path number compatibility is factored into your score as a ±5% modifier. Without a DOB, you get the standard sun-sign reading which is already complete.
Western astrology is a 4,000-year-old symbolic framework, not a scientific predictor — accuracy is interpretive rather than empirical. The calculator produces internally consistent readings using stable astrological rules. Many users find the results reflect their real-world experience. Treat readings as reflection tools, not predictions.
The percentage combines element harmony (base score), modality balance (adjustment), aspect distance (modifier), and — when dates of birth are provided — life path numerology compatibility (±5%). Scores are bounded between 58% and 97%.
The most compatible pairings are Aries–Leo, Taurus–Cancer, Gemini–Aquarius, Cancer–Pisces, Leo–Sagittarius, Virgo–Capricorn, Libra–Gemini, Scorpio–Pisces, Sagittarius–Aries, Capricorn–Taurus, Aquarius–Libra, and Pisces–Cancer. These score above 88% due to element and modality harmony.
Yes — 100% free with no sign-up, no credit card, no email required. The DOB-enhanced reading is also free. There is no premium tier and no paywall.
Yes. The same engine works for any relationship. For friendship, the Communication and Trust scores matter more than Love & Romance. For family, the modality dynamics section is most useful.
In numerology, your life path number is calculated by summing all the digits in your date of birth until you reach a single digit (1–9) or a master number (11, 22). For example, someone born on 15 March 1990 has a life path of 1+5+3+1+9+9+0 = 28 → 2+8 = 10 → 1+0 = 1. It’s considered a core personality indicator in numerology traditions.
Pick your zodiac sign.
Sun sign only — or enter your date of birth to auto-detect.