Dog Age Calculator

The "multiply by 7" method is outdated. Get your dog's real human age based on breed size.

In human years, that's

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How is a dog's age calculated?

A dog reaches about 15 human years at age 1, and 24 by age 2. After that, aging depends on size: small breeds add about 4 human years per year, medium 5, large 6, and giant breeds 7. Larger dogs age faster.

When is a dog considered senior?

Small breeds are usually senior around age 10, medium 8–9, and large breeds around 7. Senior dogs benefit from twice-yearly checkups and joint/kidney care.

Why is the "×7" rule inaccurate?

Dogs pack about 20 years of growth into their first 1–2 years, then age slowly. Multiplying by 7 makes puppies seem too old and senior dogs too young.

How do I calculate a puppy's age in months?

Divide the months by 12. For example, 6 months = 0.5 years.

This result is for general reference and does not replace veterinary advice.