Calculating the relationship between two people is often a confusing issue. There are lots of tables and charts that try to alleviate this situation, but often they just make things more complicated. I developed the following programs in an attempt to make this process easier. The Popup Cousin Calculator runs right in your browser (assuming JavaScript is enabled). The downloadable versions (DOS and Windows) are no longer available. I've also provided one version of a cousin chart below (see Boring tabular version, below).

• Popup Cousin Calculator

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Boring tabular version

From CompuServe's Genealogy Forum

On the top row, find the relationship of one person to the common ancestor and follow the column straight down. Find the other persons relationship to the common ancestor on the left hand column and follow that row straight across. The relationship is where the projected row and column meet.

CA	Common Ancestor	S	Sibling (brother or sister)
C	Child	N	Niece/Nephew
GC	Grand Child	GN	Grand Niece/Nephew
GGC	Great Grand Child	GGN	Great Grand Niece/Nephew
#C	# Cousin (1C - 1st cousin, 2C - 2nd cousin, etc.)
#R	# of times removed (1R - once removed, 2R - twice removed, etc.)

(Based on the system used by courts and most genealogical societies.)

	0	1	2	3	4	5	6	7	8	9	10
0	CA	C	GC	GGC	2 GGC	3 GGC	4 GGC	5 GGC	6 GGC	7 GGC	8 GGC
1	C	S	N	GN	GGN	2 GGN	3 GGN	4 GGN	5 GGN	6 GGN	7 GGN
2	GC	N	1C	1C 1R	1C 2R	1C 3R	1C 4R	1C 5R	1C 6R	1C 7R	1C 8R
3	GGC	GN	1C 1R	2C	2C 1R	2C 2R	2C 3R	2C 4R	2C 5R	2C 6R	2C 7R
4	2 GGC	GGN	1C 2R	2C 1R	3C	3C 1R	3C 2R	3C 3R	3C 4R	3C 5R	3C 6R
5	3 GGC	2 GGN	1C 3R	2C 2R	3C 1R	4C	4C 1R	4C 2R	4C 3R	4C 4R	4C 5R
6	4 GGC	3 GGN	1C 4R	2C 3R	3C 2R	4C 1R	5C	5C 1R	5C 2R	5C 3R	5C 4R
7	5 GGC	4 GGN	1C 5R	2C 4R	3C 3R	4C 2R	5C 1R	6C	6C 1R	6C 2R	6C 3R
8	6 GGC	5 GGN	1C 6R	2C 5R	3C 4R	4C 3R	5C 2R	6C 1R	7C	7C 1R	7C 2R
9	7 GGC	6 GGN	1C 7R	2C 6R	3C 5R	4C 4R	5C 3R	6C 2R	7C 1R	8C	8C 1R
10	8 GGC	7 GGN	1C 8R	2C 7R	3C 6R	4C 5R	5C 4R	6C 3R	7C 2R	8C 1R	9C