Chihuahua Age in Human Years (How Old is Chihuahua)

Chihuahua Age in Human Years

So you want to know your chihuahua age in human years? Finding out how old your chihuahua is in human years is not much difficult.

The Chihuahua is one of the smallest dog breeds, known for its alertness, sassiness, and loyalty. Smaller breeds like the Chihuahua dog tend to have a different aging pattern compared to larger breeds.

When it comes to determining the Chihuahua lifespan in human years, it’s important to keep in mind that their lifespan is much shorter than that of humans.

On average, Chihuahua’s lifespan is 12-20 years in dog years, but this can vary depending on factors such as diet, exercise, and health conditions.

Chihuahua live for 96 years in human years, which is equal to 20 Chihuahua dog years.

To calculate the Chihuahua years to human years, you can use the following formula:

  • First year: The first year of a Chihuahua’s life is equivalent to 15 human years.
  • Second year: The second year is equal to about 9 human years.
  • After two years: Each additional year is equivalent to 4 human years.

On the other hand, 1 human year is equivalent to 7-8 chihuahua years. Chihuahuas mature much faster early on.

Chihuahua Age in Human Years

Chihuahua Years to Human Years
Chihuahua Years to Human Years

Use below chihuahua age calculator to find out how old your Chihuahua is in human years.

1 Years old Chihuahua is 15 years old in human years

2 Years old Chihuahua is 24 years old in human years

3 Years old Chihuahua is 28 years old in human years

4 Years old Chihuahua is 32 years old in human years

5 Years old Chihuahua is 36 years old in human years

6 Years old Chihuahua is 40 years old in human years

7 Years old Chihuahua is 44 years old in human years

8 Years old Chihuahua is 48 years old in human years

9 Years old Chihuahua is 52 years old in human years

10 Years old Chihuahua is 56 years old in human years

11 Years old Chihuahua is 60 years old in human years

12 Years old Chihuahua is 64 years old in human years

13 Years old Chihuahua is 68 years old in human years

15 Years old Chihuahua is 76 years old in human years

18 Years old Chihuahua is 88 years old in human years


  1. Puppyhood: Like other dogs, Chihuahuas mature faster in their initial years. The first year of a Chihuahua’s life is roughly equivalent to about 15 human years.
  2. Adolescence: By the age of 2, a Chihuahua would have aged about 24 human years.
  3. Adulthood: After the age of 2, the aging process slows down for smaller breeds. For each subsequent year after 2, a Chihuahua ages approximately 4 human years.

Conversion Formula:

  • For the first year: Human years = 15
  • For the second year: Human years = 24
  • For each subsequent year: Human years = 24 + (Dog years – 2) * 4

How long do chihuahuas live in human years

Chihuahuas live an average of 12-18 years. A healthy adult Chihuahuas can live up to 20 years. In human years, a Chihuahua lives from 72 to 80 years.

Female Chihuahuas are thought to live 1 or 2 years longer than males. Factors that impact a Chihuahua’s lifespan include diet, weight, healthcare, genetics, and oral care.

Chihuahua Age Chart

The key life stages shown are Puppy, Adolescent, Adult, Mature Adult, and Senior. The Chihuahua years to human years chart maps out the comparative ages over the first 13 years of a chihuahua’s life. 

Chihuahua Age Chart
Chihuahua Age Chart

The chart shows the conversion of Chihuahua years to human years, based on the assumption that 1 Chihuahua year is equal to 15 human years. The chart includes the following life stages:

  • Puppyhood (0-9 months)
  • Adolescence (10-18 months)
  • Adulthood (1-7 years)
  • Seniorhood (8-13 years)

The chart also shows the equivalent human years for each Chihuahua year, ranging from 15 human years for a 1-year-old Chihuahua to 68 human years for a 13-year-old Chihuahua.

10 Interesting Facts About Chihuahuas

Here are some interesting facts about Chihuahuas:

  1. The oldest known Chihuahua lived to be 20 years and 9 months old.
  2. Chihuahuas are the smallest dog breed in the world, with an average weight of 2-8 pounds (1-4 kilograms) and an average height of 6-9 inches (15-23 centimeters).
  3. Chihuahuas have a unique skull structure that allows them to survive birth canal injuries that would be fatal for other breeds.
  4. Chihuahuas have a high metabolism and can eat more frequently than other breeds, but they should be fed in moderation to avoid obesity.
  5. Chihuahuas are known for their loyalty and can make great companions, but they can also be wary of strangers and may be protective of their owners.
  6. Chihuahuas come in a variety of coat lengths and colors, including short-haired, long-haired, and smooth-coated varieties, as well as a range of colors such as fawn, chestnut, black, and blue.
  7. Chihuahuas have a relatively low energy level and do not require a lot of exercise, making them a good choice for city living or owners who don’t have a lot of space.
  8. Chihuahuas are intelligent and can be trained with patience and consistency, but they can be stubborn at times.
  9. Chihuahuas have a strong sense of smell and can be used as therapy dogs, search and rescue dogs, and detect dogs.
  10. Chihuahuas have a long history and are believed to have originated in Mexico over 2,000 years ago. They were once considered a sacred animal by the Aztecs and were often buried with their owners.

Chihuahuas Breads

Here are some of the most common breeds of Chihuahuas:

  • Apple Head Chihuahua: This is the most common type of Chihuahua and has a rounded apple-shaped head and a short, compact body.
  • Deer Head Chihuahua: This type of Chihuahua has a slender, elongated head that resembles a deer, and a lean, athletic body.
  • Teacup Chihuahua: This is a marketing term for Chihuahuas that weigh less than 4 pounds (1.8 kilograms) and are bred to be small and compact.
  • Toy Chihuahua: This type of Chihuahua is smaller than the average Chihuahua and is often marketed as a “toy” or “pocket” size.
  • Long Coat Chihuahua: This type of Chihuahua has a long, flowing coat that requires regular grooming.
  • Smooth Coat Chihuahua: This type of Chihuahua has a short, smooth coat that is easy to maintain.
  • Fawn Chihuahua: This type of Chihuahua has a light brown or fawn-colored coat with a black mask and white markings.
  • Brindle Chihuahua: This type of Chihuahua has a striped or brindled coat with a mix of colors such as black, brown, and tan.
  • Merle Chihuahua: This type of Chihuahua has a mottled or patchwork coat with a mix of colors such as black, gray, and tan.
  • Blue Chihuahua: This type of Chihuahua has a blue-gray coat with a black mask and white markings.

It’s important to note that these are not official breed standards and that the appearance of Chihuahuas can vary greatly depending on their lineage and breeding.

Chihuahua Life Stages

The Puppy Stage

The puppy stage spans from 8 weeks when they can leave their litter to 6 months old. During this time, chihuahua puppies undergo very rapid physical and mental development. It’s important they receive proper nutrition, usually with 3-4 small meals per day. Owners also start training and socialization foundations like housebreaking, basic commands, and positive exposures to people and environments. Puppies need lots of sleep but also have bursts of high energy in between naps.

The Adolescent Stage

From 6 months to 2 years old is the adolescent phase for chihuahuas. They transition from the puppy stage to near physically adult during this time. Many vets consider chihuahuas fully grown at 1 year old. Their energy and food needs fluctuate during rapid development. They have growing capability for learning but may occasionally test boundaries like a headstrong teenager. Continuing obedience reinforcement prepares them for adulthood.

The Adult Stage

By 2 years old, chihuahuas reach their full adult stage in terms of physical and mental maturity. Energy mellows compared to adolescence and they are generally calmer in temperament if properly socialized. At this point they eat twice daily to maintain ideal body condition. It’s easier to train them and set patterns as adults. Females typically enter their first heat cycle for breeding around 6 months old.

The Senior Stage

The senior life stage starts any time after 8 years old. Signs of aging like change in activity, greying fur, joint issues, or illness may begin showing. Close medical supervision ensures catching health issues early. Owners adjust nutrition and exercise routines for the slowed metabolism. Short, gentle walks replace high energy playtimes but mental activity remains important for their health.


  1. American Kennel Club – Dog Age Chart
  2. Chihuahua Dog

Leave a Reply

Your email address will not be published. Required fields are marked *