Puppy Age Calculator
Calculate your puppy's age in human years and get development milestones, care tips, and growth information based on breed size.
Puppy Information
25-60 lbs (Beagle, Cocker Spaniel, etc.)
Puppy Development Stages
Neonatal (0-2 weeks)
Eyes closed, dependent on mother, limited mobility.
Transitional (2-4 weeks)
Eyes opening, first teeth, beginning to walk.
Socialization (4-12 weeks)
Learning social skills, basic training, exploring.
Juvenile (3-6 months)
Adult teeth, increased independence, training focus.
Adolescence (6-18 months)
Sexual maturity, testing boundaries, adult coat.
Adult (18+ months)
Fully mature, settled personality, peak condition.
How the Puppy Age calculator works
This free puppy age calculator runs entirely in your browser using standard mathematical formulas. Enter your figures, tap Calculate, and results update instantly — no signup required.
Figures are estimates for general information. Always verify important decisions with a qualified professional where relevant.
- Input your values using the fields above (numeric keypad on mobile).
- Results use precise floating-point arithmetic rounded for display.
- Refresh or change inputs and recalculate anytime.
Worked example
- Choose typical values for a common puppy age scenario.
- Enter those values in the calculator fields above.
- Tap Calculate and compare the on-screen result with the expected formula outcome.
- Adjust one input at a time to see how the result changes.