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Chihuahua age in human years

long coat chocolate and tan chihuahua

Chihuahua is a small dog breed adored for loyal character, charming personality, and a big-dog attitude.

Chihuahuas normally weigh under 6 pounds (less than 2.7 kg) and live from 14 to 16 years. Their average lifespan is 15 years (which is longer than the average dog lifespan). They are prone to some genetic health issues, but most of them are not fatal.

If you have a Chihuahua, you might wonder how old your dog is in human years. To answer this question, first, you need to know your Chihuahua's dog age. Then convert it the same way used to calculate small dog age in human years:

  • the first Chihuahua's year equals 15 human years;
  • the second year adds 9 more years to the human age;
  • each subsequent year equals 4 years in human years.

Here’s a table you can use to find a Chihuahua age equivalent in human years:

Chihuahua age Human age
1 year 15 years
2 years 24 years
3 years 28 years
4 years 32 years
5 years 36 years
6 years 40 years
7 years 44 years
8 years 48 years
9 years 52 years
10 years 56 years
11 years 60 years
12 years 64 years
13 years 68 years
14 years 72 years
15 years 76 years
16 years 80 years
17 years 84 years
18 years 88 years
19 years 92 years
20 years 96 years

Some interesting facts:

  • 8 weeks - this is a minimum legal age when a Chihuahua puppy can be adopted. It’s the time when the pups make a complete switch to solid foods;
  • Female Chihuahuas are thought to live 1 or 2 years longes than males;
  • Female Chihuahuas get their first periods at the age of 6 months old, but the best time to breed is after they become adults;
  • Chihuahua TobyKeith is considered the oldest Chihuahua. On 16 March 2022 he had his record verified at the age of over 21 years (over 100 years in human age equivalen).

Chihuahua age chart

chihuahua age in human years chart