WhatsMyPetsAge.com
How old is my pet in human years?
Dogs, cats, horses and rabbits all grow up faster than we do, then settle into their own pace. Pop in your pet's age and we'll translate it.
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Dog age compared with human age
Dog years to human years chart
Why not just multiply by seven?
Because pets don't age in a straight line. A one-year-old dog or cat is about as grown up as a 15-year-old, and a two-year-old is in their mid-twenties. After that it slows to four to seven human years a year, depending on the animal. The times-seven rule makes puppies too young and old terriers far too old.
Why does a dog's size matter?
Big dogs age faster. A ten-year-old Chihuahua is middle-aged; a ten-year-old Great Dane is properly elderly. For a cross-breed, go by the weight your dog is (or will be) when fully grown.
And horses?
A yearling is like a six- or seven-year-old child, and a three-year-old is about 18. From four onwards it's roughly two and a half human years a year, so a 20-year-old horse is about 60. Plenty of ponies are still going strong in their thirties.
And rabbits?
Rabbits grow up astonishingly fast: a four-month-old is like a 12-year-old, and by their first birthday they're about 20. After that it's roughly six human years a year. Most pet rabbits live 8 to 12 years.
How exact is this?
It's a good rough guide, not a medical measurement. Breed, weight, diet and plain luck all play a part, so if you're wondering how your own pet is getting on, ask your vet.