Lab Puppy Color Calculator
Predict Labrador Retriever puppy coat colors — black, chocolate, or yellow — from the parent coat colors using B and E locus genetics.
What Is the Lab Puppy Color Calculator?
Predict Labrador Retriever puppy coat colors — black, chocolate, or yellow — from the parent coat colors using B and E locus genetics.
Labrador coat color is determined by just two gene loci — B (black/brown) and E (extension/yellow). Understanding these genes lets breeders and owners predict puppy colors before a litter is born. This calculator uses the known or estimated parent genotypes to calculate the probability of each color in the litter.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
Labrador color is controlled by two loci: the B locus (TYRP1 gene) determines black vs chocolate/brown. BB or Bb = black pigment, bb = chocolate/brown pigment. The E locus (MC1R gene) determines whether pigment is expressed — EE or Ee = normal expression, ee = yellow (overrides B locus entirely). A yellow Lab can carry black (Ebb) or chocolate (eebb) genes and pass them to offspring despite appearing yellow.
All three Labrador colors follow standard Mendelian inheritance with no linked health effects from coat color alone. The so-called "Dudley" Labrador (pink nose, pale eyes in a yellow dog) results from being homozygous recessive at both loci (bbee).
Sources: Schmutz SM, Berryere TG. Genes affecting coat colour and pattern in domestic dogs. Animal Genetics 2007; Eizirik E et al. Recessive mutations at the MC1R gene produce yellow coloration in some mammals. J Hered 2003.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- Merck Veterinary Manual u2014 Genetics — Canine coat colour genetics and hereditary traits
- Kennel Club Breed Standards — Recognised breed standards and genetic characteristics
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.