How long does a Dog live?

A dog lives 12 years on average (maximum recorded: 29 years). They reach maturity at 2 years.

Lifespan Overview

Average Lifespan

12 years

Maximum Recorded

29 years

Maturity Age

2 years

Human Year Ratio

1:7

Dogs live 10-13 years on average (varies hugely by breed). The '7 dog years = 1 human year' rule is a myth — the first year equals ~15 human years, the second ~9, then ~4-5 per year after.

Dog Age → Human Age Converter

Dog age: 6 years

≈ 42 human years

Developmental Stages

Puppy 0 days – 6 months

Human equivalent: 0-10 years

Rapid growth, socialization window, teething.

Adolescent 6 months – 2 years

Human equivalent: 10-25 years

Sexual maturity, testing boundaries, full size reached.

Adult 2 years – 7 years

Human equivalent: 25-50 years

Prime of life. Stable energy, peak health.

Senior 7 years – 10 years

Human equivalent: 50-70 years

Slowing down, gray muzzle, joint issues begin.

Geriatric 10 years – 13 years

Human equivalent: 70-85 years

Significant decline. Cognitive changes. End of life care.

Fun Fact

The oldest verified dog was Bobi, a Rafeiro do Alentejo from Portugal, who lived 31 years (2023 record, later disputed). Bluey, an Australian Cattle Dog, lived 29 years 5 months.

Frequently Asked Questions

How long does a dog live?

Dogs live 10-13 years on average (varies hugely by breed). The '7 dog years = 1 human year' rule is a myth — the first year equals ~15 human years, the second ~9, then ~4-5 per year after.

What is 1 dog year in human years?

Approximately 7 human years, though this varies by life stage. Use the age converter above for a more accurate estimate.

What is the oldest dog ever recorded?

The maximum recorded lifespan is 29 years. The oldest verified dog was Bobi, a Rafeiro do Alentejo from Portugal, who lived 31 years (2023 record, later disputed). Bluey, an Australian Cattle Dog, lived 29 years 5 months.

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