What name compatibility compares
Name compatibility compares two Expression numbers — the figure you get by adding up every letter of a full birth name. Where the Life Path describes the road a person is on, the Expression is read as how they travel it: the abilities they bring, and how they present, negotiate and come across.
The calculator above works out both Expression numbers, shows every letter's value as you type, and reads the pair with the same scheme as the Love compatibility calculator: a verdict — Mirror match, Same triad, Natural bridge or Growth pairing — a band word, and a short reading. It compares the Expression only. Birth dates, and the vowel-based Soul Urge, are compared on the Love tab, which puts four numbers side by side.
How each Expression number is calculated
Both names go through the same four steps, and the strip of letters under each name box shows them as you type:
- Convert each letter — Use the Pythagorean table shown above: A to I are 1 to 9, J to R start again at 1, S to Z run 1 to 8. Accents are dropped, so Renée counts as RENEE. Y is simply 7 — the vowel question that complicates the Soul Urge never arises, because every letter counts.
- Add the words — Spaces, hyphens and apostrophes separate words but carry no value, so Anne-Marie and Anne Marie give the same total.
- Reduce the total — Add the digits until one is left, but stop at 11, 22 or 33 whenever you land on one. These are the master numbers.
- Pair by the root — For the comparison, a master number counts as the digit beneath it: 11 as 2, 22 as 4, 33 as 6.
Which names to use for name compatibility
Use each person's full birth name as it was first registered — first name, every middle name and the surname, in the original spelling — and leave out titles and suffixes such as Dr or Jr. That is the standard convention and the one the calculator assumes; the step-by-step guide covers adoption, transliteration and other edge cases.
Nicknames and married names are not wrong to calculate, but they are a different input and give a different number. The tradition reads a name you have taken on as a second, learned identity layered over the one you were given. A good way to use the tool is to compare birth name with birth name first, then the names you actually use, and see whether the pairing moves.
Whatever you choose, apply the same rule to both people. Comparing one person's birth name with the other's nickname mostly measures the difference in inputs.
Why name calculators give different answers
Two calculators can give the same pair of names different results without either being broken. The usual reasons:
- A different letter table — The Chaldean system assigns letters by sound and uses only 1 to 8, so the same name often lands on another number. This site uses the Pythagorean table throughout; Pythagorean vs Chaldean compares the two.
- Master numbers kept or reduced — Some calculators keep 11, 22 or 33 only as a final total, or never. That changes the number displayed but not our pairing, because a master number is paired by the digit it would have reduced to anyway.
- Different letters counted — Some name-compatibility tools add only first names, or only the vowels. This one uses every letter of the full name.
- Umlauts and accents — Here accents are dropped to the base letter. German numerology instead spells umlauts out — ü as UE — which adds a letter, and the German edition of this site follows that convention, so a name such as Jürgen gives a different number there.
Reading a name pairing against a birth-date pairing
For the same two people, the name pairing and the Life Path pairing often disagree. A close Life Path pairing with a Growth pairing on the names reads as two people headed the same way who go about it differently; the reverse reads as two people who come across alike but want different things from life. Neither overrules the other, and the tradition gives the birth date more weight because it cannot change — the Love calculator weights the Life Path at 40% and the Expression at 25%.
For what each Expression number brings on its own, start with its page in the numbers, then read the pair. Like every compatibility reading here, a name pairing describes tendencies to talk about, not a verdict on two people.
Common questions
Should we use our married names or our birth names?
Start with birth names — that is the convention the calculator assumes. Then, if you like, compare the names you use now. They are readings of different things: the names you were given and the names you live under. If you now share a surname, which one it is cannot affect whether you are a Mirror match — only your first and middle names decide that.
What if we have the same Expression number?
That is a Mirror match: quick recognition and a shared blind spot. An 11 and a 2 count as the same number here, as do a 22 and a 4, and a 33 and a 6.
Is name compatibility more accurate than birth-date compatibility?
Neither is accurate in a predictive sense; they read different things. Names can change and dates cannot, which is why the tradition — and the four-number breakdown on the Love tab — gives the Life Path more weight.
Does it work with accents, apostrophes or names from other alphabets?
Accents are dropped to the base letter, and punctuation only separates words. A name written in another alphabet needs transliterating into Latin letters first, and the spelling you choose will change the result — use the spelling on the official document, and use it consistently for both of you.
Why is only the Expression number compared?
It is the one number built from the whole name, so it stands for the name as a whole. The vowel-based Soul Urge is compared on the Love tab, alongside the Life Path and Birthday numbers.
Written and maintained by the numberlore editorial team. How we work: our editorial policy and method.