Calculate your puppy's age in human years and get development milestones, care tips, and growth information based on breed size.
25-60 lbs (Beagle, Cocker Spaniel, etc.)
Eyes closed, dependent on mother, limited mobility.
Eyes opening, first teeth, beginning to walk.
Learning social skills, basic training, exploring.
Adult teeth, increased independence, training focus.
Sexual maturity, testing boundaries, adult coat.
Fully mature, settled personality, peak condition.
Our free puppy age calculator converts dog age to human years and shows life stage (neonatal, socialization, juvenile, adult). Dog size affects ageing: larger dogs often age faster. Use it as a guide; individual health varies. For human age try our age calculator.
You may also find our age calculator useful.
The “7 dog years per human year” rule is a rough guide. Modern charts often use different rates for year one and by breed size; this calculator applies a size-based approach.
Generally yes. Small breeds often live longer than large breeds. The calculator can factor in size for the conversion.
Common stages: neonatal (0–2 weeks), transitional (2–4 weeks), socialization (4–12 weeks), juvenile (3–6 months), adolescence (6–18 months), adult (18+ months).