# Numerology compatibility calculator

Enter two full names and dates of birth. The calculator compares the two charts number by number and gives a score out of 100, from the published pair table the API uses.

## How the score is calculated

Each person's chart is calculated first. Then the calculator compares pairs of numbers and scores each pair on a table of how numerology reads them together:

| Pair | Weight |
|---|---|
| Life Path and Life Path | 30% |
| Expression and Expression | 20% |
| Soul Urge and Soul Urge | 15% |
| One person's Soul Urge and the other's Personality, both ways | 15% |
| One person's Life Path and the other's Expression, both ways | 10% |
| Personality and Personality | 5% |
| Birthday and Birthday | 5% |

Each pair scores from 20 (two numbers that clash, such as 1 and 8, which both want to lead) to 90 (numbers in the same natural group). When both numbers of a pair are master numbers, the pair scores 10 more. The weighted average is the score, and the rating follows from it: **strong** from 75, **good** from 60, **mixed** from 45, and **challenging** below.

## Reading the result

A score is a summary, not a verdict. Two people with a "mixed" score can have one strong pair, such as matching Life Paths, that matters more to them than the rest. Start with the two [Life Path numbers](/life-path-number-calculator), which carry the most weight, and read what each one means.

## Frequently asked questions

### Which numbers matter most for compatibility?

The Life Path, which carries 30% of the score, then the Expression and the Soul Urge. Comparing Life Path numbers alone is the quick version most compatibility charts use.

### Are any Life Path numbers incompatible?

No pair is ruled out. Some pairs are read as harder work, such as 1 and 8 (two leaders) or 4 and 5 (stability against freedom), but numerology treats them as challenges rather than prohibitions.

### Can I use this for friends or business partners?

Yes. The calculation is the same for any two people. Only the reading of it changes.