Dog Years to Human Years by Size

Size of Dog =>	Small 20 lbs or less	Medium 21 - 50 lbs	Large 51 - 100 lbs	Giant 100+ lbs
Age of Dog	Age in human years
2 months	1.5	1.5	1.5	1.2
6 months	5	5	5	4.5
8 months	9	9	9	8
1 year	15	15	15	12
2 years	24	24	24	22
3 years	28	28	28	31
4 years	32	32	32	38
5 years	36	36	36	45
6 years	40	42	45	49
7 years	44	47	50	56
8 years	48	51	55	64
9 years	52	56	61	71
10 years	56	60	66	79
11 years	60	65	72	86
12 years	64	69	77	93
13 years	68	74	82	100
14 years	72	78	88	107
15 years	76	83	93	114
16 years	80	87	99	121

How to Calculator Dog Age?

Calculating a dog's age involves understanding the way dogs age compared to humans. Contrary to the belief that one dog year equals seven human years, the aging process is not linear. Dogs age more quickly in their earlier years and then the rate slows down as they mature. Here are the steps to calculate a dog's age:

Traditional Method:

For Younger Dogs: In the first two years of a dog's life, their aging process is more rapid. A common approximation is that the first year of a dog's life is equivalent to 15 human years, and the second year is similar.
Beyond Two Years: After the initial two years, the calculation becomes a bit more complex. A general rule is that each additional dog year might be roughly equivalent to 4-5 human years.

Breed and Size Consideration:

The breed size also plays a significant role in the aging process. Different breeds age at varying rates. Smaller breeds tend to live longer and mature more slowly compared to larger breeds.

Modern Calculations:

More accurate models for dog age calculations take into account different phases of a dog's life and various breed sizes. They involve complex algorithms and genetic studies.

Online Tools and Calculators:

Several online tools and calculators are available that take into account a dog's breed size and specific age to provide a more accurate estimate of the dog's age in human years.