Dog Breed Size Calculator
Look up the typical adult height, weight and lifespan for a range of dog breeds.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Look up reference ranges for selected breeds. These are broad adult ranges, not predictions for an individual dog; mixed ancestry, sex, and local breed standards can change the result. This tool does not determine feeding, exercise, or medication needs.
Worked example
calculated with the default values below
Breed Labrador Retriever Typical adult weight range 55–80 lb · Typical adult height range 21–24 in · Typical lifespan range 10–12 years · Reference size class Large
General background references
Disclaimer
These calculators offer general guidance and do not replace veterinary advice. Individual animals vary with breed, weight, health status and medication. Suspected poisoning from chocolate, medication, plants or chemicals is an emergency — contact your veterinarian or a pet poison control service immediately rather than relying on a calculator.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
Lookup weight range, height range, lifespan range, and size class by breed
- W1
- breed weight low, lb
- W2
- breed weight high, lb
- H1
- female height, in
- H2
- male height, in
Reference ranges from the 14-breed table; no individual prediction or advice on exercise, feeding, or medication.
Frequently asked questions
What should I know about this estimate?
Look up reference ranges for selected breeds. These are broad adult ranges, not predictions for an individual dog; mixed ancestry, sex, and local breed standards can change the result. This tool does not determine feeding, exercise, or medication needs.