Dog Age Calculator | Dog Age in human years chart

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
17 years	84	91	104	128
18 years	88	95	109	135
19 years	92	99	114	142
20 years	96	103	119	149

How to Calculate Dog Age?

Calculating a dog's age involves understanding how dogs age differently compared to humans. It's a common misconception that one dog year is equivalent to seven human years, but the aging process is more complex. Here are some methods to help you determine your dog's age in human years:

Traditional Method:

The traditional method for calculating a dog's age involves simple multiplication:

First Year: The first year of a dog's life is roughly equivalent to 15 human years. This is because dogs mature much faster in their early years.
Second Year: The second year adds approximately nine human years.
Subsequent Years: Each following year is equivalent to about five human years for small and medium breeds, and about six years for large breeds.

Breed and Size Consideration:

The breed and size of a dog significantly influence its aging process. Smaller breeds tend to live longer and age more slowly compared to larger breeds. Here's how size affects aging:

Small Breeds (20 lbs or less): Generally, small dogs age slower and have a longer lifespan.
Medium Breeds (21-50 lbs): Medium-sized dogs age at a moderate rate, falling between small and large breeds.
Large Breeds (51-100 lbs): Large dogs age faster and typically have shorter lifespans.
Giant Breeds (100+ lbs): Giant breeds age the fastest and have the shortest lifespans.

Modern Calculations:

Modern methods for calculating a dog's age take into account more variables than traditional methods. Veterinary science has developed more accurate models that consider factors such as genetics, breed, and overall health. These methods provide a more precise estimate of a dog's age in human years.

Online Tools and Calculators:

For a quick and easy way to determine your dog's age in human years, you can use online calculators. These tools use advanced algorithms that factor in the dog's breed, size, and age to provide an accurate conversion. Simply input your dog's age and size, and the calculator will do the rest.