Dog Age Chart – How Old Is My Dog

Are you interested in knowing the age of your dog using their age chart? Many studies say that one dog year is equivalent to seven human years and while some agree, others tend to disagree.

If asked, we all would want our dogs to live eternally so we can enjoy their loyalty, friendliness, and much more endlessly. Unfortunately, our canine friends only live for a limited amount of time and knowing the dog age chart will help us relate better with them as they age. Different dog breeds have unique age charts as some live longer and others shorter.

Today, we shall look into the calculation of dog age, the dog age chart based on different factors such as weight, teeth, breed, and size, as well as their age in human years. By the end of this topic, you will have an answer to all your questions to end the confusion.

What is the dog age chart?

The dog age chart refers to a table that compares the age of a dog to that of humans based on their size (small, medium, large, and giant). The chart helps you calculate the real age of your canine friend without assumptions depending on your dog breed and size.

How to determine or calculate the dog age

The most straightforward method to calculate or determine the real age of your dog is by multiplying 1 dog year by 7 years. How so you may ask? As said earlier, it is an assumption stating that on average, humans live approx. 70 years while dogs have a lifespan of 10 years.

If your dog is 4 years old, for instance, that is 28 human years.

The most precise way to determine or calculate the dog age, however, is different from the above as displayed by data from different bodies such as vet hospitals, pet-insurance companies, and breed-club surveys. The ageing rate of a dog is not consistently 7 human years. Instead, the number of human years heaps onto a pooch’s life more rapidly during his or her fast growth to maturity.

According to these statistics from the American Veterinary Medical Association (AVMA), a medium-size dog 1^st year equals 15 human years and the 2^nd year approx. 9 human years. After this, each human year is equivalent to about 4 or 5 human years.

How to calculate small dog age

Just like any other dog breed, calculating a small dog’s age uses three principles where the first dog year is equivalent to 15 human years. The dog’s second year equals approx. 9 human years and after that each extra dog year equals to approx. 4 to 5 human years.

How old is my dog chart

Check out our chart below if you wish to know how old your dog is.

Size of Dog	Small-Size Dogs	Medium-Size Dogs	Large-size dogs
Age of Dog	Age in Human Years	Age in Human Years	Age in Human Years
1 year	15	15	15
2	24	24	24
3	28	28	28
4	32	32	32
5	36	36	36
6	40	42	45
7	44	47	50
8	48	51	55
9	52	56	61
10	56	60	66
11	60	65	72
12	64	69	77
13	68	74	82
14	72	75	88
15	76	83	93
16	80	87	120

Table 1: Your dog’s age in human years [Courtesy of WebMD]

Dog age chart based on weight

Here is a dog age chart based on weight:

Dog Age	1 – 20 lbs.	20 – 50 lbs.	50 – 90 lbs.	Above 90 lbs.
1	7	7	8	9
2	13	14	16	18
3	20	21	24	26
4	26	27	31	34
5	33	34	38	41
6	40	42	45	49
7	44	71	50	56
8	48	51	55	64
9	52	56	61	71
10	56	60	66	78
11	60	68	72	86
12	64	69	77	93
13	68	74	82	101
14	72	78	88	108
15	76	83	93	115
16	80	87	99	123

Table 2: Dog age chart based on weight

Dog age chart in months

Dog Age	Human Age
2 months	1 year 2 months
6 months	5 years
8 months	9 years
1 year	15 years
2 years	24 years
3 years	28 years
4 years	32 years
7 years	37 years
8 years	47 years
9 years	52 years
10 years	57 years
11 years	67 years
12 years	72 years
13 years	77 years
14 years	82 years

Table 3: Dog age chart in months

Dog age chart by breed

Dog breeds are divided into small, medium, large, and giant.

Age of Dog	Age in Human Years for small dogs	Age in Human Years for medium dogs	Age in Human Years for large-size dogs	Age in Human Years for giant dogs
1	15	15	15	12
2	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	58	74	82	100
14	72	78	88	107
15	76	83	93	114
16	80	87	99	121

Table 4: Dog age chart by breed

Calculate dog age by breed

Different dog breeds age in a different way which means that small and large dog breeds will not age alike. To calculate dog age by breed, take their age against the calculation principle mentioned above (1^st dog years = 15 human years, 2^nd dog year = 9 human years & 4-5 human years after that). 

Dog age chart for Different Dog Breeds:

There are more than 400 different breed of dogs globally which are all unique in the way they age and progress. From toy or small dog breeds like the Yorkshire Terriers (Yorkies) and Chihuahuas to medium-size dog breed like a Siberian Huskies and large dog breeds such as the German Shepherds and Golden Retrievers, all these dogs have different timetables when it comes to ageing.

Here are the dog age charts for:

German Shepherd Age Chart

The German Shepherd is a medium-to-large sized dog breed with a life expectancy of 9 to 13 years. Here is the dog age chart for the German Shepherd:

German Shepherd Years	Human years
1	15
2	24
3	28
4	32
5	36
6	45
7	50
8	55
9	61
10	66
11	72
12	77
13	82

Yorkies Age Chart

The Yorkshire Terrier or Yorkie is a toy or small size dog breed with a life expectancy of 13 to 16 years. Here is the dog age chart for the Yorkies:

Yorkie years	Human years
2	24
3	28
4	32
5	36
6	40
7	44
8	48
9	52
10	56
11	60
12	64
13	68
14	72
15	76
16	80
17	84

Chihuahua Age Chart in Human Years

The Chihuahua is a toy or small sized dog breed with a life expectancy of 12 to 20 years. Here is the dog age chart for the Chihuahua:

Chihuahua Years	Human years
1	7
2	13
3	20
4	26
5	33
6	40
7	44
8	48
9	52
10	56
11	60
12	64
13	68
14	72
15	76
16	80
17	84
18	88
19	92
20	96

Siberian Husky Age Chart

The Siberian Husky is a medium-sized dog breed with a life expectancy of 12 to 15 years. Here is the dog age chart for the Siberian Husky:

Siberian Husky	Human Years
1	15
2	24
3	28
4	36
5	42
6	47
7	51
8	56
9	60
10	65
11	69
12	74
13	78
14	83
15	87

Golden Retriever

The Golden Retriever is a medium-to-large size dog breed with a life expectancy of 10 to 12 years. Here is the dog age chart for the Golden Retriever:

Golden Retriever Years	Human years
1	7
2	14
3	21
4	27
5	34
6	42
7	47
8	51
9	56
10	60
11	68
12	69

Dog age chart by size

Dog’s Age	Age in Human Years for Small-size breed	Age in Human Years for Medium-size breed	Age in Human Years for Large breed
1	15	15	15
2	24	24	24
3	28	28	28
4	32	32	32
5	36	36	36
6	40	42	45
7	44	47	50
8	48	51	55
9	52	56	61
10	56	60	66
11	60	65	72
12	64	69	77
13	68	74	82
14	72	78	88
15	76	83	93
16	80	87	120

Table 5: Dog age chart by size

Dog age chart by teeth

You can also tell how old your dog is by looking at their teeth. Here is how:

Dog age	Teeth
8 weeks	Has all puppy teeth
6 – 7 months	Has all adult teeth
1 – 2 years	Duller teeth & possible yellowing on the back teeth
3 – 5 years	Possible tartar on the teeth
5 – 10 years	More wear & infection signs on the teeth
10 – 15 years	Possible dense tartar build-up on teeth & might appear broken or missing

Table 6: Dog age chart by teeth

How old are dogs in human years chart

Although you have been told that your dog’s 1 year equals your 7 years, the math is not as easy as they make it sound. That is because the rate of maturity in dogs is faster as compared to that of humans which explains why a 1 dog year equals to approx. 15 human years.

And because dog breed and size are factors affecting ageing as well, it is why small dog breeds have a long lifespan compared to large dog breeds. They also tend to mature faster than large dog breeds. Check out the chart below:

Age of Dog	Age in Human Years for Small Dog Breed	Age in Human Years for Medium Dog Breed	Age in Human Years for Large Dog Breed
1 year	15	15	15
2	24	24	24
3	28	28	28
4	32	32	32
5	36	36	36
6	40	42	45
7	44	47	50
8	48	51	55
9	52	56	61
10	56	60	66
11	60	65	72
12	64	69	77
13	68	74	82
14	72	75	88
15	76	83	93
16	80	87	120

Table 7: Dog age chart in human years

Dog age conversion chart

Do you wish to know how old your canine buddy would be in human years? The dog is man’s best friend so they say and knowing how they age helps maintain them better. If you are tired of the assumptions, use the AKC dog age conversion chart below:

AKC dog age chart

Here is the dog age chart from the American Kennel Club (AKC):

Dog Age	Age in Human Years for Small dog	Age in Human Years for Medium dog	Age in Human Years for Large dog	Age in Human Years for Giant dog
1	15	15	15	12
2	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	58	74	82	100
14	72	78	88	107
15	76	83	93	114
16	80	87	99	121

Table 8: AKC dog age chart

Hills dog age chart

Here is Hills dog age chart to help you determine the true age of your canine friend:

Dog’s Age	Weight in Kgs (0 – 10) – small dogs	Weight in Kgs(10 – 25) -medium dogs	Weight in Kgs(25 – 40) large dogs	Weight in Kgs – Over 40 giant dogs
1	7	7	8	9
2	13	14	16	18
3	20	21	24	26
4	26	27	31	34
5	35	34	38	41
6	40	42	45	49
7	44	47	50	56
8	48	51	55	64
9	52	56	61	71
10	56	60	66	78
11	60	65	72	86
12	64	69	77	93
13	68	74	82	101
14	72	78	88	108
15	76	83	93	115
16	80	87	99	123
17	84	92	104	131
18	88	96	115	139
19	92	101	120
20	96	105	126
21	100	109	130
22	104	113
23	108	117
24	112	120
25	116	124

Table 9: Hills dog age chart

FAQs

How to calculate my dog’s age

Here is a methodology for calculating your dog’s age whether it is a small, medium, or large dog breed that has a weight of below 100 lbs. Below is a simplified formula – [human_age = 16ln(dog_age) + 31]. To calculate your dog’s age, remember these principles:

• 1^st dog year equals 15 human years
• 2^nd dog year equals approx. 9 human years
• Extra years equals approx. 4 – 5 human years