Small Dog Age Chart

Small dogs (under 20 lbs) have the longest lifespans of all dog sizes, often living 12-16 years or more. They age more slowly after reaching maturity compared to larger breeds. Popular small breeds include Chihuahuas, Pomeranians, Yorkshire Terriers, and Dachshunds.

Small Dog Age Conversion

Pet Years	Human Years
0	0
1	15
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

Want to calculate your pet's exact age? Try our Pet Age Calculator for instant results.

Key Points

Small dogs often live 12-16 years or longer
They become seniors around age 10-12
Dental care is especially important for small breeds
Small dogs may need more frequent meals

Why Small Dogs Live Longer

The relationship between body size and lifespan in dogs is opposite to what we see across species (elephants outlive mice). Within dogs, smaller breeds consistently outlive larger ones. Research suggests this is because large dogs age at an accelerated rate—their lives seem to unfold in fast motion. A study published in The American Naturalist found that large dogs age faster and die younger because they expend more energy growing. Every 4.4 lbs of body mass reduces life expectancy by about one month. Small dogs also have lower rates of cancer and age-related diseases, contributing to their longevity advantage.

Note: This information is for general guidance only. Individual pets may age differently based on genetics, diet, and health. Always consult your veterinarian for personalized advice.

Frequently Asked Questions

Why do small dogs live longer?

Smaller dogs have slower metabolisms and experience less physical stress on their bodies. They also tend to develop age-related diseases later than larger breeds.

What are common health issues in small dogs?

Small dogs are prone to dental problems, luxating patellas, and tracheal collapse. Regular vet care and dental cleaning help prevent many issues.