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dog years

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It’s often said that the age of dogs can be calculated by multiplying their age, in human years, by seven.

However, it’s more complicated than that, and here’s a handy calculator to do it for you.

  • Different breeds of dog age at varying speeds
  • Dogs age at varying speeds at different stages of their lives

Alternatively, you can find out how old you would be if you were a dog. You can choose to be a labrador, a spaniel, a whippet, or any one of 20 breeds.

The calculator uses these multipliers for the first two years of a dog’s life:

  • 12.5 for small dogs
  • 10.5 for medium-sized dogs
  • 9 for large dogs

Then, for the third and subsequent years of the dog’s life, each human year has to be multiplied by between 4.3 and 13.4 years, depending on the breed:Dog years calculator

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

The calculator does not work for cross breeds, sadly, but on average these live 1.22 years longer than pure breeds.

Nor does the calculator work for cats. What we can say is that the average life expectancy of a cat is 12.1 years, which equates to 64 human years.

Guidelines issued by the American Association of Feline Practitioners say that cats reach 10 human years in their first six months and are approximately 24 at the age of two years. After this their age increases by four “cat years” every year.

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