Dog Years to Human Years Calculator
Convert dog years to human years with the modern science-based formula. Accounts for dog size. Free dog age calculator.
Based on the epigenetic clock research: dogs age fast early, then slow down. Large breeds age faster after maturity.
Frequently asked questions
- Why is multiply by 7 wrong?
- Dogs age much faster than humans in the first two years and slower afterwards. The logarithmic formula matches DNA methylation research.
- Does dog size matter?
- Yes. Large breeds mature later but age faster in adulthood and have shorter lifespans than small breeds.
- When is a dog fully grown?
- Around 10 months for small breeds, 8 for medium and up to 18-24 months for giant breeds.
- What is a typical dog lifespan?
- Small breeds often reach 14-16 years, medium 12-14 and large breeds 9-12 years.
This tool runs entirely in your browser. No data is uploaded anywhere.