DNA Relationship Probabilities

This table shows the ranges of actual shared DNA segment lengths that you can expect based on standard deviation calculations (see On Deriving the DNA Relationship Probability Table). The lengths shown are calculated based on a total chromosome length of 6950 cM. If you need values in percent, simply divide by that number.

Use with caution - Sample sizes must be at least 400 before the confidence levels can begin to be accurate. Sample sizes greater than 10,000 should not improve the accuracy further.
DNA Survey Submission Form

Collapse Confidence Level
Cluster Relation Gen. Sample 99.0% 99.9% 100%
2.0 Parent/Child 7 3,439.90-3,489.95 cM 3,432.95-3,496.89 cM 3,413.17-3,516.68 cM
3.0 Sibling 2 2,890.00-2,890.00 cM 2,890.00-2,890.00 cM 2,890.00-2,890.00 cM
3.5 Half Sibling 3 1,415.22-1,870.56 cM 1,352.05-1,933.73 cM 1,172.07-2,113.70 cM
4.0 Aunt/Uncle/Nephew/Niece 9 1,308.53-1,985.08 cM 1,214.67-2,078.94 cM 947.26-2,346.35 cM
4.5 Half Aunt/Uncle/Nephew/Niece 6 591.16-1,066.51 cM 525.21-1,132.46 cM 337.32-1,320.34 cM
5.0 Great Aunt/Uncle/Nephew/Niece 2 770.76-804.24 cM 766.11-808.89 cM 752.88-822.12 cM
5.0 1st Cousin 4 438.98-1,067.13 cM 351.83-1,154.27 cM 103.56-1,402.55 cM
5.5 Half Great Aunt/Uncle/Nephew/Niece 2 379.24-515.76 cM 360.30-534.70 cM 306.34-588.66 cM
5.5 Half 1st Cousin 13 281.92-622.48 cM 234.67-669.73 cM 100.07-804.33 cM
6.0 1st Cousin 1x Removed 24 139.92-724.08 cM 58.88-805.12 cM 0.00-1,036.01 cM
6.5 Half 1st Cousin 1x Removed 20 53.11-395.88 cM 5.56-443.44 cM 0.00-578.92 cM
7.0 1st Cousin 2x Removed 17 51.87-319.07 cM 14.80-356.14 cM 0.00-461.76 cM
7.0 2nd Cousin 34 0.00-438.18 cM 0.00-502.76 cM 0.00-686.75 cM
7.5 Half 1st Cousin 2x Removed 5 11.18-40.78 cM 7.07-44.88 cM 0.00-56.58 cM
7.5 Half 2nd Cousin 15 0.00-248.22 cM 0.00-289.54 cM 0.00-407.26 cM
8.0 1st Cousin 3x Removed 2 0.00-267.19 cM 0.00-314.89 cM 0.00-450.81 cM
8.0 2nd Cousin 1x Removed 98 0.00-188.34 cM 0.00-215.64 cM 0.00-293.42 cM
8.5 Half 1st Cousin 3x Removed 2 19.46-27.44 cM 18.35-28.55 cM 15.19-31.71 cM
8.5 Half 2nd Cousin 1x Removed 31 0.00-113.44 cM 0.00-131.92 cM 0.00-184.55 cM
9.0 1st Cousin 4x Removed 2 34.00-34.00 cM 34.00-34.00 cM 34.00-34.00 cM
9.0 2nd Cousin 2x Removed 60 0.00-97.06 cM 0.00-112.53 cM 0.00-156.59 cM
9.0 3rd Cousin 107 0.00-134.24 cM 0.00-154.58 cM 0.00-212.52 cM
9.5 Half 2nd Cousin 2x Removed 10 8.23-72.19 cM 0.00-81.06 cM 0.00-106.34 cM
9.5 Half 3rd Cousin 16 0.00-83.57 cM 0.00-97.70 cM 0.00-137.96 cM
9.999 Double 3rd Cousin 1x Removed 1 69.00-69.00 cM 69.00-69.00 cM 69.00-69.00 cM
10.0 1st Cousin 5x Removed 1 7.00-7.00 cM 7.00-7.00 cM 7.00-7.00 cM
10.0 2nd Cousin 3x Removed 11 2.69-29.67 cM 0.00-33.42 cM 0.00-44.08 cM
10.0 3rd Cousin 1x Removed 198 0.00-78.07 cM 0.00-89.37 cM 0.00-121.57 cM
10.5 Half 3rd Cousin 1x Removed 15 0.00-67.73 cM 0.00-77.73 cM 0.00-106.21 cM
10.94 3rd Cousin 2x Removed 6 3 0.00-110.68 cM 0.00-129.49 cM 0.00-183.05 cM
10.999 Double 4th Cousin 2 0.00-48.83 cM 0.00-57.37 cM 0.00-81.70 cM
11.0 2nd Cousin 4x Removed 3 0.00-37.09 cM 0.00-42.62 cM 0.00-58.36 cM
11.0 3rd Cousin 2x Removed 58 0.00-45.47 cM 0.00-51.85 cM 0.00-70.02 cM
11.0 4th Cousin 164 0.00-55.17 cM 0.00-63.53 cM 0.00-87.34 cM
11.5 Half 3rd Cousin 2x Removed 4 2.33-40.42 cM 0.00-45.71 cM 0.00-60.76 cM
11.5 Half 4th Cousin 26 0.00-36.91 cM 0.00-42.21 cM 0.00-57.31 cM
11.93 3rd Cousin 3x Removed 7 1 19.00-19.00 cM 19.00-19.00 cM 19.00-19.00 cM
11.94 4th Cousin 1x Removed 6 17 0.63-32.68 cM 0.00-37.13 cM 0.00-49.80 cM
11.949 Double 4th Cousin 1x Removed 5 1 42.00-42.00 cM 42.00-42.00 cM 42.00-42.00 cM
11.999 Double 3rd Cousin 3x Removed 1 23.00-23.00 cM 23.00-23.00 cM 23.00-23.00 cM
11.999 Double 4th Cousin 1x Removed 10 0.00-52.72 cM 0.00-60.82 cM 0.00-83.91 cM
12.0 3rd Cousin 3x Removed 19 0.00-60.98 cM 0.00-70.85 cM 0.00-99.00 cM
12.0 4th Cousin 1x Removed 275 0.00-46.81 cM 0.00-53.69 cM 0.00-73.29 cM
12.499 Half Double 4th Cousin 1x Removed 1 8.00-8.00 cM 8.00-8.00 cM 8.00-8.00 cM
12.5 Half 3rd Cousin 3x Removed 1 56.48-56.48 cM 56.48-56.48 cM 56.48-56.48 cM
12.5 Half 4th Cousin 1x Removed 21 0.00-51.93 cM 0.00-59.49 cM 0.00-81.03 cM
12.93 4th Cousin 2x Removed 7 8 7.26-15.12 cM 6.16-16.21 cM 3.06-19.32 cM
12.93 5th Cousin 7 4 19.10-33.90 cM 17.05-35.95 cM 11.20-41.80 cM
12.939 Double 5th Cousin 6 1 37.00-37.00 cM 37.00-37.00 cM 37.00-37.00 cM
12.94 4th Cousin 2x Removed 6 2 24.42-36.78 cM 22.70-38.50 cM 17.82-43.38 cM
12.94 5th Cousin 6 21 0.00-37.55 cM 0.00-43.27 cM 0.00-59.57 cM
12.949 Double 4th Cousin 2x Removed 5 1 21.80-21.80 cM 21.80-21.80 cM 21.80-21.80 cM
12.997 Quadruple 4th Cousin 2x Removed 1 24.90-24.90 cM 24.90-24.90 cM 24.90-24.90 cM
12.999 Double 4th Cousin 2x Removed 7 1.81-25.50 cM 0.00-28.79 cM 0.00-38.15 cM
12.999 Double 5th Cousin 26 0.00-40.61 cM 0.00-46.70 cM 0.00-64.05 cM
13.0 4th Cousin 2x Removed 113 1.02-36.77 cM 0.00-41.73 cM 0.00-55.87 cM
13.0 5th Cousin 235 0.00-36.81 cM 0.00-41.93 cM 0.00-56.50 cM
13.499 Half Double 4th Cousin 2x Removed 1 39.00-39.00 cM 39.00-39.00 cM 39.00-39.00 cM
13.5 Half 4th Cousin 2x Removed 17 5.43-39.34 cM 0.72-44.05 cM 0.00-57.45 cM
13.5 Half 5th Cousin 7 3.28-34.50 cM 0.00-38.83 cM 0.00-51.17 cM
13.929 Double 5th Cousin 1x Removed 7 1 11.90-11.90 cM 11.90-11.90 cM 11.90-11.90 cM
13.93 5th Cousin 1x Removed 7 3 7.63-22.37 cM 5.58-24.42 cM 0.00-30.24 cM
13.94 5th Cousin 1x Removed 6 17 1.53-37.67 cM 0.00-42.68 cM 0.00-56.97 cM
13.997 Quadruple 5th Cousin 1x Removed 1 9.70-9.70 cM 9.70-9.70 cM 9.70-9.70 cM
13.998 Triple 5th Cousin 1x Removed 4 4.62-41.33 cM 0.00-46.42 cM 0.00-60.93 cM
13.999 Double 5th Cousin 1x Removed 31 1.82-30.37 cM 0.00-34.33 cM 0.00-45.61 cM
14.0 4th Cousin 3x Removed 6 0.00-43.95 cM 0.00-50.27 cM 0.00-68.28 cM
14.0 5th Cousin 1x Removed 402 0.00-37.68 cM 0.00-42.93 cM 0.00-57.90 cM
14.44 Half 5th Cousin 1x Removed 6 3 5.90-10.10 cM 5.31-10.69 cM 3.65-12.35 cM
14.499 Half Double 5th Cousin 1x Removed 1 9.00-9.00 cM 9.00-9.00 cM 9.00-9.00 cM
14.5 Half 4th Cousin 3x Removed 3 10.43-39.90 cM 6.34-43.99 cM 0.00-55.64 cM
14.5 Half 5th Cousin 1x Removed 39 2.96-32.73 cM 0.00-36.87 cM 0.00-48.63 cM
14.93 6th Cousin 7 5 0.25-28.95 cM 0.00-32.93 cM 0.00-44.28 cM
14.94 5th Cousin 2x Removed 6 1 9.10-9.10 cM 9.10-9.10 cM 9.10-9.10 cM
14.94 6th Cousin 6 7 1.87-52.36 cM 0.00-59.37 cM 0.00-79.33 cM
14.95 6th Cousin 5 1 49.00-49.00 cM 49.00-49.00 cM 49.00-49.00 cM
14.998 Triple 6th Cousin 2 1.57-34.03 cM 0.00-38.53 cM 0.00-51.36 cM
14.999 Double 5th Cousin 2x Removed 2 3.04-32.66 cM 0.00-36.77 cM 0.00-48.48 cM
14.999 Double 6th Cousin 22 1.67-25.47 cM 0.00-28.77 cM 0.00-38.17 cM
15.0 5th Cousin 2x Removed 23 0.00-52.79 cM 0.00-60.85 cM 0.00-83.83 cM
15.0 6th Cousin 334 0.00-35.49 cM 0.00-40.90 cM 0.00-56.31 cM
15.44 Half 6th Cousin 6 1 11.00-11.00 cM 11.00-11.00 cM 11.00-11.00 cM
15.5 Half 5th Cousin 2x Removed 2 23.10-23.10 cM 23.10-23.10 cM 23.10-23.10 cM
15.5 Half 6th Cousin 44 2.49-26.00 cM 0.00-29.26 cM 0.00-38.55 cM
15.93 6th Cousin 1x Removed 7 4 0.43-42.27 cM 0.00-48.08 cM 0.00-64.61 cM
15.94 6th Cousin 1x Removed 6 1 20.70-20.70 cM 20.70-20.70 cM 20.70-20.70 cM
15.949 Double 6th Cousin 1x Removed 5 1 9.40-9.40 cM 9.40-9.40 cM 9.40-9.40 cM
15.998 Triple 6th Cousin 1x Removed 2 0.00-55.15 cM 0.00-63.83 cM 0.00-88.57 cM
15.999 Double 5th Cousin 3x Removed 1 9.20-9.20 cM 9.20-9.20 cM 9.20-9.20 cM
15.999 Double 6th Cousin 1x Removed 12 1.86-58.37 cM 0.00-66.21 cM 0.00-88.55 cM
16.0 5th Cousin 3x Removed 3 3.11-25.62 cM 0.00-28.75 cM 0.00-37.65 cM
16.0 6th Cousin 1x Removed 77 2.64-32.24 cM 0.00-36.35 cM 0.00-48.04 cM
16.5 Half 6th Cousin 1x Removed 2 0.00-33.03 cM 0.00-38.03 cM 0.00-52.29 cM
16.919 Double 7th Cousin 8 1 34.00-34.00 cM 34.00-34.00 cM 34.00-34.00 cM
16.93 7th Cousin 7 1 15.30-15.30 cM 15.30-15.30 cM 15.30-15.30 cM
16.949 Double 6th Cousin 2x Removed 5 1 10.80-10.80 cM 10.80-10.80 cM 10.80-10.80 cM
16.95 7th Cousin 5 1 9.50-9.50 cM 9.50-9.50 cM 9.50-9.50 cM
16.996 Pentuple 7th Cousin 1 17.60-17.60 cM 17.60-17.60 cM 17.60-17.60 cM
16.997 Quadruple 7th Cousin 1 14.70-14.70 cM 14.70-14.70 cM 14.70-14.70 cM
16.998 Triple 6th Cousin 2x Removed 1 12.20-12.20 cM 12.20-12.20 cM 12.20-12.20 cM
16.998 Triple 7th Cousin 2 9.25-15.95 cM 8.32-16.88 cM 5.68-19.52 cM
16.999 Double 6th Cousin 2x Removed 5 1.50-27.10 cM 0.00-30.65 cM 0.00-40.77 cM
16.999 Double 7th Cousin 2 20.76-54.24 cM 16.11-58.89 cM 2.88-72.12 cM
17.0 6th Cousin 2x Removed 15 0.00-34.22 cM 0.00-39.31 cM 0.00-53.82 cM
17.0 7th Cousin 42 0.13-33.32 cM 0.00-37.93 cM 0.00-51.05 cM
17.499 Half Double 7th Cousin 1 10.90-10.90 cM 10.90-10.90 cM 10.90-10.90 cM
17.92 7th Cousin 1x Removed 8 1 15.50-15.50 cM 15.50-15.50 cM 15.50-15.50 cM
17.996 Pentuple 7th Cousin 1x Removed 1 9.20-9.20 cM 9.20-9.20 cM 9.20-9.20 cM
17.998 Triple 7th Cousin 1x Removed 1 14.20-14.20 cM 14.20-14.20 cM 14.20-14.20 cM
17.999 Double 6th Cousin 3x Removed 1 30.00-30.00 cM 30.00-30.00 cM 30.00-30.00 cM
17.999 Double 7th Cousin 1x Removed 2 9.62-14.78 cM 8.91-15.49 cM 6.87-17.53 cM
18.0 6th Cousin 3x Removed 1 35.00-35.00 cM 35.00-35.00 cM 35.00-35.00 cM
18.0 7th Cousin 1x Removed 37 3.32-31.90 cM 0.00-35.86 cM 0.00-47.16 cM
18.499 Half Double 7th Cousin 1x Removed 1 15.40-15.40 cM 15.40-15.40 cM 15.40-15.40 cM
18.996 Pentuple 8th Cousin 1 8.80-8.80 cM 8.80-8.80 cM 8.80-8.80 cM
18.999 Double 8th Cousin 1 6.90-6.90 cM 6.90-6.90 cM 6.90-6.90 cM
19.0 7th Cousin 2x Removed 2 6.94-32.96 cM 3.33-36.57 cM 0.00-46.85 cM
19.0 8th Cousin 10 2.43-23.41 cM 0.00-26.31 cM 0.00-34.60 cM
19.92 8th Cousin 1x Removed 8 1 11.00-11.00 cM 11.00-11.00 cM 11.00-11.00 cM
19.94 7th Cousin 3x Removed 6 1 13.40-13.40 cM 13.40-13.40 cM 13.40-13.40 cM
20.0 8th Cousin 1x Removed 11 0.00-28.20 cM 0.00-32.54 cM 0.00-44.89 cM
20.94 8th Cousin 2x Removed 6 2 5.48-13.72 cM 4.34-14.86 cM 1.08-18.12 cM
20.998 Triple 9th Cousin 1 19.10-19.10 cM 19.10-19.10 cM 19.10-19.10 cM
21.94 8th Cousin 3x Removed 6 5 0.00-21.77 cM 0.00-24.81 cM 0.00-33.48 cM
21.94 9th Cousin 1x Removed 6 9 2.26-24.16 cM 0.00-27.20 cM 0.00-35.86 cM
22.0 9th Cousin 1x Removed 1 34.00-34.00 cM 34.00-34.00 cM 34.00-34.00 cM
22.94 9th Cousin 2x Removed 6 11 0.00-32.15 cM 0.00-37.57 cM 0.00-53.01 cM
22.94 10th Cousin 6 2 7.03-8.57 cM 6.81-8.79 cM 6.20-9.40 cM
23.0 9th Cousin 2x Removed 1 49.00-49.00 cM 49.00-49.00 cM 49.00-49.00 cM
23.93 9th Cousin 3x Removed 7 1 24.10-24.10 cM 24.10-24.10 cM 24.10-24.10 cM
23.94 10th Cousin 1x Removed 6 13 0.78-22.38 cM 0.00-25.37 cM 0.00-33.91 cM
24.0 10th Cousin 1x Removed 1 29.60-29.60 cM 29.60-29.60 cM 29.60-29.60 cM
24.5 Half 10th Cousin 1x Removed 1 16.90-16.90 cM 16.90-16.90 cM 16.90-16.90 cM
24.94 10th Cousin 2x Removed 6 1 11.40-11.40 cM 11.40-11.40 cM 11.40-11.40 cM
24.94 11th Cousin 6 1 6.70-6.70 cM 6.70-6.70 cM 6.70-6.70 cM
25.94 11th Cousin 1x Removed 6 5 6.73-21.87 cM 4.63-23.97 cM 0.00-29.96 cM
26.0 11th Cousin 1x Removed 1 10.90-10.90 cM 10.90-10.90 cM 10.90-10.90 cM
27.0 11th Cousin 2x Removed 2 16.11-17.39 cM 15.93-17.57 cM 15.42-18.08 cM
27.94 12th Cousin 1x Removed 6 1 8.70-8.70 cM 8.70-8.70 cM 8.70-8.70 cM
28.0 11th Cousin 3x Removed 1 13.70-13.70 cM 13.70-13.70 cM 13.70-13.70 cM
Total 3032
Last Updated: Sunday, 14-Aug-22 21:33:28 GMT (Now)
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