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The Shared cM Project 4.0 tool v4

Read more about the tool and this update

March 2020

Blaine T. Bettinger

www.thegeneticgenealogist.com

More about this project

CC 4.0 Attribution License

Interactive version v4 by Jonny Perl at DNA Painter

Click here to contribute data to the shared cM project

Last updated 26th March 2020

Important

• For relationships more distant than Half 2C, the averages were determined only for relationships in which DNA was shared.

• The more distant a relationship, the more likely it is that you won't share DNA at all (read more)

• These statistics do not cater for pedigree collapse or endogamy

Filter

reset or enter %
Click here for a shareable link to the cM amount above

New Click on any relationship to view a histogram

Relationship probabilities (based on stats from The DNA Geek)

  • Enter a number above to see probabilities

How to read this chart

  • RelationshipAverageRange
    (low to high;
    99th percentile)
  • Great-Great-Great-Grandparent
  • GGGG Aunt / Uncle
  • Great-Great-Grandparent
  • GGG Aunt / Uncle
  • Half GG-Aunt / Uncle208103 – 284
  • Great-Grandparent887485 – 1486
  • Great-Great-Aunt / Uncle420186 – 713
  • 1C3R11725 – 238
  • 2C3R510 – 154
  • Other Relationships
  • Half 1C2R12516 – 269
  • Half Great-Aunt / Uncle431184 – 668
  • Grandparent1754984 – 2462
  • Great-Aunt / Uncle850330 – 1467
  • 1C2R22133 – 471
  • 2C2R710 – 244
  • 3C2R360 – 166
  • 6C180 – 71
  • Half 2C1R660 – 190
  • Half 1C1R22462 – 469
  • Half Aunt / Uncle871492 – 1315
  • Parent34852376 – 3720
  • Aunt / Uncle17411201 – 2282
  • 1C1R433102 – 980
  • 2C1R12214 – 353
  • 3C1R480 – 192
  • 4C1R280 – 126
  • 6C1R150 – 56
  • Half 3C480 – 168
  • Half 2C12010 – 325
  • Half 1C449156 – 979
  • Half Sibling17591160 – 2436
  • Sibling26131613 – 3488
  • SELF
  • 1C866396 – 1397
  • 2C22941 – 592
  • 3C730 – 234
  • 4C350 – 139
  • 5C250 – 117
  • 6C2R130 – 45
  • Half 3C1R370 – 139
  • Half 2C1R660 – 190
  • Half 1C1R22462 – 469
  • Half Niece / Nephew871492 – 1315
  • Niece / Nephew17401201 – 2282
  • Child34872376 – 3720
  • 1C1R433102 – 980
  • 2C1R12214 – 353
  • 3C1R480 – 192
  • 4C1R280 – 126
  • 5C1R210 – 80
  • 7C140 – 57
  • Half 3C2R270 – 78
  • Half 2C2R480 – 144
  • Half 1C2R12516 – 269
  • Half Great-Niece / Nephew431184 – 668
  • Great-Niece / Nephew850330 – 1467
  • Grandchild1754984 – 2462
  • 1C2R22133 – 471
  • 2C2R710 – 244
  • 3C2R360 – 166
  • 4C2R220 – 93
  • 5C2R180 – 65
  • 7C1R120 – 50
  • Half 3C3R
  • Half 2C3R
  • Half 1C3R600 – 120
  • Half GG-Niece / Nephew208103 – 383
  • Great-Great-Niece / Nephew420186 – 713
  • Great-Grandchild887485 – 1486
  • 1C3R11725 – 238
  • 2C3R510 – 154
  • 3C3R270 – 98
  • 4C3R190 – 60
  • 5C3R130 – 30
  • 8C110 – 42