Reduction: master numbers, the life path, and the two sums
Reduction adds digits down to one place. 11, 22, and 33 stay as master numbers by default. The life path reduces month, day, and year first, and also keeps the sum of every digit at once.
Editorial review: 2026-09-22 · Reviewed by fateshow · Editorial method
Add to one place, and stop on a master number
Above 9, keep adding. On 11, 22, or 33, stop by default. Do not reduce those to 2, 4, or 6 unless master numbers are turned off.
0 can appear in a challenge number. 0 is a legal result, not a blank.
The life path keeps two sums
Split: reduce month, day, and year, add them, and reduce again. Whole: add every digit of the date, then reduce.
The two results usually match. They split when a master number appears in between. Both are printed.
Month, day, and year each stay
The birthday number is the reduced day. The attitude number is day plus month, reduced. The year number is the reduced year. They are not aliases of the life path.
No birth time or place is required. A lunar date is converted to the civil date before the digits are taken.
Illustration: 20 May 1990 reduces to 8
Civil date 20 May 1990. Both the split sum and the whole sum are 8. Month 5, day 2, year 1, attitude 7.
The definition is on What numerology is.
Common mistakes
- Reducing 11 to 2 while master numbers are on.
- Keeping one life-path sum and hiding the other.
- Adding the digits of a lunar date directly.
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Frequently asked questions
Why is 20 May 1990 an 8?
Month 5. Day 2. Year 1+9+9+0 reduces to 1. 5+2+1=8. The all-digit sum is also 8.
When do the two sums differ?
When 11, 22, or 33 appears in the split sum and is kept. This date does not split.
Is a birth time required?
No. Only the civil year, month, and day are used.
Sources and editorial basis
- 1. Reduction rules
Master numbers 11, 22, and 33 stay by default. The life path keeps both the split sum and the all-digit sum.
- 2. fateshow rule snapshot
Supports only the fields printed in the illustration.