The Right Way To Calculate Dog's Age


Image: Annette Shaff/Shutterstock

The old way of multiplying a dog's age in human years by 7 is just not cutting it anymore. To get at your dog's true age, follow this formula:

For first two years:

9 years per human year for the first two years for small dogs
10.5 years per human year for the first two years for medium sized dogs
12.5 years per human year for the first two years for large dogs

For years 3+:

Small: Dachshund (Miniature) 4.32, Border Terrier 4.47, Lhasa Apso 4.49, Shih Tzu 4.78, Whippet Medium 5.30, Chihuahua 4.87, West Highland White Terrier 4.96, Beagle 5.20, Miniature Schnauzer 5.46, Spaniel (Cocker) 5.55, Cavalier King Charles 5.77, Pug 5.95, French Bulldog 7.65

Medium: Spaniel 5.46, Retriever (Labrador) 5.74, Golden Retriever 5.74, Staffordshire Bull Terrier 5.33, Bulldog 13.42

Large: German Shepherd 7.84, Boxer 8.90

Read more about the reasoning behind the new formula over at this post by Ben Carter of the BBC News: Link

Love cute animals? View more at Lifestyles of the Cute and Cuddly blog

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Confused. Most female dogs have their 1st heat at around 6 months. They are capable of getting pregnant and having puppies at that point. Male dogs can also reproduce at a very young age. So I would say 6 calendar months equals about 12 or 13 years in human aging. After that it would slow down condiderably.
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