Free Calculator
How old is your dog in human years?
Enter your dog's breed and age for an accurate result — based on size and breed lifespan data, not the 1:7 myth.
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Uses a size-based formula: small breeds age more slowly, giant breeds age faster after year 2. Results are estimates — consult your vet for health advice. Learn more about how we calculate.
Result
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Select your dog's breed and age, then tap Calculate.
Human Age Equivalent
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human years old
Life Stage
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Avg. Lifespan
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Life Progress
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Did you know?
1:7
The popular myth. Real ratio varies widely
~15
Human years a dog gains in its first year
29yr
Oldest recorded dog ever, Bobi (Portugal)
200+
Dog breeds covered in this calculator
From the Blog
Learn more about dog ages
Science
Is the 7-Year Rule a Myth? The New Science of Dog Aging
New research including the epigenetic clock has changed how we understand dog aging entirely.
Milestone Guide
How Old is 1 Human Year in Dog Years? The Critical First 12 Months
The answer is closer to 15 human years — not 7. Here is what really happens in year one.
Rescue Guide
How to Tell Your Dog's Age if You Rescued Them
No birth records? Estimate your rescue dog's age using teeth, eyes, coat, and behaviour.