COI Calculator for Dog Breeders
COI estimate, shared ancestors, pedigree depth, and confidence rating

Understand inbreeding risk
before planning a litter.

SmartPupPro helps breeders review pedigrees, identify shared ancestors, estimate Coefficient of Inbreeding, and understand how much pedigree depth supports the calculation.

Estimate
COI
Find
Ancestors
Review
Depth
Support
Decisions
COI workflow

From pedigree to pairing review

🐕 Select a potential sire and dam
🌳 Review available pedigree depth
🔎 Identify shared ancestors
📊 Estimate COI percentage
Review risk and confidence

COI is easier to use when it is connected to your pedigree records.

SmartPupPro helps breeders connect pedigree data, shared ancestors, genetic notes, and breeding plans in one workflow.

What is COI in dog breeding?

COI stands for Coefficient of Inbreeding. It helps estimate how closely related a breeding pair is.

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COI Estimate

Review an estimated COI percentage based on the pedigree information available for the planned pairing.

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Shared Ancestors

See which ancestors appear on both sides of the pedigree so relationship risk is easier to understand.

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Risk Awareness

Use COI as one part of your breeding review alongside health testing, structure, temperament, and goals.

Confidence Rating

Understand whether the COI estimate is supported by deep pedigree data or limited ancestry records.

Dog breeder COI analysis tools

Review pedigree relationship risk before committing to a breeding plan.

📊

COI Calculation

Estimate the Coefficient of Inbreeding for a potential breeding pair using available pedigree data.

  • ✔ Estimated COI percentage
  • ✔ Relationship review
  • ✔ Breeding pair comparison
  • ✔ Pairing decision support
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Shared Ancestor Review

Identify common ancestors between the sire and dam so linebreeding patterns are easier to see.

  • ✔ Common ancestor list
  • ✔ Pedigree relationship clues
  • ✔ Sire and dam comparison
  • ✔ Better visibility before breeding
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Pedigree Depth Rating

See how much pedigree depth was available so the COI estimate is easier to trust and explain.

  • ✔ Available generations
  • ✔ Data depth review
  • ✔ Confidence rating
  • ✔ Insufficient data notice
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Breeder Decision Notes

Keep notes about why a pairing was selected, avoided, delayed, or reconsidered.

  • ✔ Pairing notes
  • ✔ Risk observations
  • ✔ Health considerations
  • ✔ Future planning history

Move beyond guessing from a printed pedigree.

SmartPupPro helps breeders estimate COI, review shared ancestors, understand pedigree depth, and connect the results to real breeding plans.

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Why pedigree depth matters for COI.

A COI estimate is only as useful as the pedigree information behind it. A shallow pedigree may miss shared ancestors that appear farther back.

High confidence
Deeper pedigree information is available, making the estimate more useful for planning.
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Limited confidence
Some pedigree information is available, but the estimate should be reviewed with caution.
⚠️
Insufficient data
When there is not enough pedigree data, SmartPupPro can show that the COI estimate is not reliable yet.
Example COI analysis

Planned Pairing Review

Sire
Champion Blue Ridge Archer
Dam
Willow Creek Bella
Estimated COI
3.9%
Risk Level
Low
Pedigree Depth Used
5 generations
Confidence Rating
High
Shared Ancestors
  • Grand Champion Evergreen Duke
  • Silver Creek Legacy
This example pairing shows a relatively low estimated COI with enough pedigree depth to support a more useful review.

Understanding COI percentages

COI is one part of a responsible breeding decision, not the only factor.

Estimated COI General Interpretation Breeder Review
Under 5% Low Often easier to justify when other health and pairing factors are favorable.
5% - 10% Moderate Worth reviewing shared ancestors, health testing, and breeding goals carefully.
10% - 15% Elevated May require stronger justification and a closer look at pedigree risk.
Above 15% High Should be reviewed cautiously with health, genetic, and long-term program goals in mind.
COI does not replace genetic testing, health screening, temperament evaluation, structure review, or breeder judgment. It gives breeders another way to evaluate a planned pairing.

Connect COI to real breeding decisions.

COI is most useful when it is connected to dog profiles, pedigree records, genetic results, breeder notes, and planned litters.

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Pedigree-based review
Keep pedigree data connected to each dog so future pairings are easier to evaluate.
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Genetic context
Review COI alongside genetic test results, carrier status, health notes, and breeder priorities.
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Planning notes
Save notes about why a pairing was selected, delayed, avoided, or reconsidered.
SmartPupPro genetic analysis screen showing COI review, shared ancestors, pedigree confidence, and breeding notes
Ready to review COI before your next litter?

Plan pairings with clearer pedigree information.

SmartPupPro helps breeders estimate COI, review shared ancestors, understand pedigree confidence, and connect breeding decisions to future litter plans.