Dog Age Chart: Dog Years To Human Years | How Old Is My Dog?

How old is your dog in human years? We used to simply multiply a dog’s age by seven. However, this calculation isn’t so cut-and-dried. See our dog age calculator and chart to discover your dog’s age.

Do Dogs Age 7 Years to Our 1 Year?

The easy way to calculate a dog’s age is to take 1 dog year and multiply it by 7 years. This is based on the assumption that dogs live to about 10 and humans live to about 70, on average. For example, a dog that is 5 years old is 35 in “human years.”

Contrary to common belief, dogs do not age at a rate of 7 human years for each dog year. The number of human years piles onto a dog’s life more quickly during the dog’s rapid growth to maturity. Read Next

• Cat Age Chart: Cat Years to Human Years Calculator
• Windchill Chart for the United States
• 100 Ways to Avoid Dying: Learn How Not to Die

That said, this isn’t a bad approach from a health perspective because it helps humans realize that our dogs aren’t the same as children.

As pets get older, they need extra care and attention. Small dogs are generally considered “senior” at seven years of age. Larger breeds are often senior when they are 5 to 6 years of age.

Be aware of arthritis and related discomfort or irritability, weight control, sight and hearing issues, and any changes in behavior or activity that could indicate more serious issues.

Visit your vet for exams regularly; adjustments can be made to give your pet a more comfortable, longer, and healthier life.

How to Calculate a Dog’s Age Properly

Statistics from pet insurance companies, breed club surveys, and veterinary hospitals have helped us learn more about how dogs age. According to the American Veterinary Medical Association:

• The first year of a medium-sized dog’s life equals approximately 15 years of a human’s life.
• The second year of a dog’s life equals about 9 years for a human.
• After that, every human year equals approximately 4 or 5 years for a dog.

Dog Years to Human Years Chart

If we think like a dog, here’s how a dog’s age compares to a human’s age! Note that this is still not a perfect calculator. There are many variations based on a dog’s breed, its background, and its size. Note that this calculator is for a medium-sized breed of dog. Consult the chart below to see the differences between dogs of different sizes (small, medium, large, giant). It should give you a good sense of where your dog is in the development/aging process.

• Small Dog: 20 pounds or less
• Medium Dog: 21 to 50 pounds
• Large Dog: 51 pounds to 100 pounds
• Giant Dog: Over 100 pounds

Age of Dog	Dog’s Age in Human Years
	Small	Medium	Large	Giant
1 year	15	15	15	12
2 years	24	24	24	22
3	28	28	28	31
4	32	32	32	38
5	36	36	36	45
6	40	42	45	49
7	44	47	50	56
8	48	51	55	64
9	52	56	61	71
10	56	60	66	79
11	60	65	72	86
12	64	69	77	93
13	68	74	82	100
14	72	78	88	107
15	76	83	93	114
16	80	87	99	121

Courtesy of “How to Calculate Dog Years to Human Years”

Related Articles

• Have a cat? See our Cat Age Chart!
• Is your dog starting to enter its elderly years? Get some tips for caring for an old pup.
• Also, check our home remedies for your pet’s arthritis.

How old is your canine companion? Tell us in the comments below!