Lo Shu Grid Compatibility Calculator

How is each Lo Shu grid built?

All digits of the date (year, month, day) are read, zeros are skipped, and each digit 1 to 9 is counted. The grid is drawn with 4, 9, 2 across the top row, 3, 5, 7 in the middle and 8, 1, 6 along the bottom. A filled cell shows the digit and its count, such as [9×2]; an empty cell shows [ ].

What is the exact scoring formula?

Start at 20, add 10 for every digit 1 to 9 that appears in both grids, add 6 for every digit that appears in only one of the two grids, and cap the total at 95. How many times a digit repeats does not matter, only whether it is present.

Is there a minimum score for two dates in the same century?

Everyone born from 1900 to 1999 has a 1 and a 9 from the “19” at the start of the year, so those two cells are shared automatically, adding 20 before anyone’s own digits are counted. Together with the base of 20, that gives a floor of 40 for any two dates in the 1900s. For two dates in 2000 or later, the automatically shared digit is a 2 from “20”, so the floor is lower.

Does the order of the two dates matter?

No. Complementary digits are counted in both directions, so swapping person 1 and person 2 gives the same score. The results list also shows each person’s unique digits separately.

Why can identical dates score lower than different ones?

Because shared digits earn 10 each and complementary ones 6 each, the score rises with the number of distinct digits in play. Two identical dates with only three distinct digits, such as 2001-02-03 entered twice, give 20 + 30 = 50. Two different dates covering six digits between them can score higher.

What do the trait labels beside the numbers mean?

Each digit carries a one-word label in the output: 1 Communication, 2 Intuition, 3 Memory, 4 Practicality, 5 Emotion, 6 Creativity, 7 Sacrifice, 8 Wisdom, 9 Idealism. They are traditional associations built into the tool, not measured traits.

What if a date has digits the other lacks completely?

Those digits are listed as complementary and each adds 6 points. The list of unique digits for each person and the combined complementary list are shown separately, so you can see exactly which digits produced the points.

Does the score say how well two people will get on?

No. Lo Shu numerology is a traditional, belief-based practice and has not been scientifically validated. The percentage is a count of overlapping digits in two dates, with no demonstrated link to how two people relate, and it should not influence decisions about a relationship.