Numerology compatibility calculator
This calculator compares two birthdays in two ways at once. It works out each person’s birthday number and reads the pair, and it finds each person’s sun sign and reads that pair too. You get a numerology score and an astrology score side by side, kept separate on purpose, because the two systems come from different traditions and do not combine.
Month and day for each person. The birth year is not part of either reading, so we do not ask for it, and nothing you enter is stored or sent anywhere.
Enter both birthdays to see the numerology and sun-sign readings side by side.
A worked example
Take one person born on 14 March and another born on 22 November.
For the numerology reading, add each birthday and reduce it. 14 March gives 3 + 14 = 17, which reduces to 8. 22 November gives 11 + 22 = 33, which stops on the master number 33. Read side by side they score 76/100, which reads as complementary.
For the sun-sign reading, 14 March is Pisces and 22 November is Sagittarius. Comparing their elements and modalities gives 52/100. That is a different question with a different answer, which is exactly why the two are not merged.
Neither number is a verdict. A higher one tends to mean an easier natural rhythm; a lower one tends to mean two people who get more out of naming their differences out loud.
The personal day calculator handles a single person on a single date, and reading two people’s days side by side covers the day-by-day version of the same idea.
Common questions
How does the compatibility calculator work?
It reads two birthdays two ways. The numerology side adds each person's birth month and day and reduces it to a birthday number, then compares the two. The astrology side finds each person's sun sign and compares their elements and modalities. You get two separate scores, not one blended figure.
Why are the numerology and astrology scores kept separate?
Because they come from different traditions and do not combine. There is no established mapping between numbers and star signs, so blending them into a single score would mean inventing one. The honest version is to show both readings side by side and let you weigh them yourself.
Do you need our birth years?
No. Both readings use only a birth month and day. A sun sign comes from the month and day, and a birthday number is the month plus the day reduced down. Asking for a birth year would collect a full date of birth for no reason, so this calculator does not, and it stores nothing.
Does a low score mean two people are incompatible?
No. The scores are clamped so nothing reads as a perfect match or a hopeless one, and a lower number usually means two people need to translate for each other more deliberately, not that they do not fit. Treat it as a way to start a conversation, not a verdict.
Is any of this stored or sent anywhere?
No. The whole calculation runs in your browser. Nothing you enter is sent to a server, saved to an account, or written to storage, and there is no account system on this site to attach it to in the first place.