Labrador Age in Human Years — Dog Age Calculator
Convert your dog's age to human years with two published models — the AVMA/AKC size-class table and the 2019 UCSD epigenetic formula — plus a life-stage label.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
This page opens the dog age calculator with the large size class preselected — the right bracket for a Labrador Retriever, which typically weighs 25–36 kg. Enter your Lab's age and you get two estimates at once: the AVMA/AKC size table (15 human years for year one, +9 for year two, then +5 per year for large dogs) and the 2019 UCSD epigenetic formula 16 × ln(age) + 31.
The epigenetic estimate is especially relevant here: the UCSD study that produced the formula measured DNA methylation in Labrador Retrievers specifically, so this breed is the one dog for which the curve is a direct fit rather than an extrapolation. It shows rapid early aging — a 2-year-old Lab maps to roughly 42 human years — followed by a much slower climb.
Labradors typically live 11 to 13 years. Weight management makes a documented difference: a lifelong Purina study found that lean-fed Labs lived nearly two years longer than their overfed littermates and developed joint problems later. Expect the senior stage from around age 7–8, when vets recommend twice-yearly checkups for the breed.
Example. A 2-year medium dog maps to 24 human years on the size table and 42.1 on the epigenetic formula 16 times ln(age) plus 31.
Limit. Ages above 30 are ignored, and the epigenetic figure is withheld when the age is under 1 year.