Ever wondered exactly how old your dog is in human years? The old “multiply by 7” rule isn’t actually accurate — dogs age faster in their early years, and how quickly they age later depends a lot on their size. Smaller breeds tend to live longer and age more slowly overall, while larger breeds age faster and reach their senior years sooner. Enter your dog’s age and size below to get a more accurate estimate — and find out if they may be entering their senior years.

Curious what "senior" actually means for your dog's size and breed? Check out our full guide: What Age Is a Dog Considered a Senior? (By Size & Breed)