Dog Age Calculator
Convert dog years to human years by size.
years
How it works
A dog's first year counts as about 15 human years, the second as 9 more (24 total), and each later year adds 4 for small, 5 for medium, or 6 for large dogs. Larger breeds age faster. This is an estimate; your vet can judge your dog's real condition.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.