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Esoteric Numbers

Glossary

Sun Number

The sun number uses the exact same formula as the attitude number, adding the day and month of birth and reducing the total. The name "sun number" was popularized by some modern numerology sites and apps, while "attitude number" is the more traditional term, and both group people into nine broad types.

How it's calculated

  1. Reduce the day of birth to a single digit.
  2. Reduce the month of birth to a single digit.
  3. Add the two results together and reduce to a single digit from 1 to 9.

Example Born 14 March: the day gives 1 + 4 = 5, the month gives 3. Adding 5 + 3 gives 8, so the sun number is 8.

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Related terms

Common questions

Is the sun number different from the attitude number?
No. They use an identical calculation from the day and month of birth. Which name you see depends on which numerologist or app you are reading.
Is the sun number related to astrology?
Not in its numerology calculation. The name echoes the idea of a sun sign, but the number itself comes purely from the day and month of birth, not from astrology.
Why do some sites use "sun number" instead of "attitude number"?
It is largely a branding choice by more recent numerology sites and apps; the underlying formula and meaning trace back to the same traditional attitude number.

Last reviewed: August 12, 2026