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Dog Age Calculator - Dog Years to Human Years

Convert your dog's age to human years using the latest veterinary science. Results vary by size because larger dogs age faster. The old "multiply by 7" rule isn't accurate. Dogs age differently based on their size, with larger breeds aging faster than smaller ones.

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How Old Is My Dog in Human Years?

The old "multiply by 7" rule isn't accurate. Dogs age differently based on their size, with larger breeds aging faster than smaller ones.

The Science of Dog Aging

Small dogs (under 20 lbs): Age slower, often living 15-20 years
Medium dogs (20-50 lbs): Moderate aging rate, typically 12-15 years
Large dogs (50-100 lbs): Age faster, typically 10-13 year lifespan
Giant dogs (100+ lbs): Age fastest, often 7-10 year lifespan

Enter your dog's age and size below for an accurate human years conversion.