Free business calculator
Dog Age Calculator
Estimate a dog’s human-age stage using age and adult size instead of the old seven-times rule.
- Instant results
- Private in your browser
- PDF report included
Use the result well
A clear answer, with the assumptions visible
These recommendations turn the result into an operational next step without hiding the inputs behind a score.
- 1
Use life stage as a conversation starter, not a diagnosis.
- 2
Ask a veterinary professional about checkup timing and age-related needs.
- 3
Healthy weight, dental care, movement, and medical history matter more than one age number.
How this tool works
- Treat the first two years as fast early development.
- Use a slower yearly factor after age two.
- Increase later-year aging for larger dogs.
Build it in Bookify
Start with Bookify Bring the plan into your daily work
Keep bookings, clients, payments, and records together in Bookify.