Question 1

How do you calculate dog years to human years?

Accepted Answer

Modern research (UC San Diego 2019) shows the old "multiply by 7" rule is wrong. A 1-year-old dog is roughly 15 in human years, a 2-year-old dog is 24, and each year after adds 4-5 years. Smaller breeds live longer; larger breeds age faster after year 5.

Question 2

How old is my cat in human years?

Accepted Answer

A 1-year-old cat equals about 15 human years, a 2-year-old cat equals 24, and each year after adds 4 human years. Indoor cats typically live 12-18 years, while outdoor cats average 8-12 years.

Question 3

Is this pet age calculator free and private?

Accepted Answer

Yes — completely free, no signup, and all calculations run in your browser. Your pet's information never leaves your device.

Question 4

What pets are supported?

Accepted Answer

The calculator supports dogs (with size adjustments), cats, rabbits, hamsters, parrots/birds, horses, guinea pigs, and turtles — each using their species-appropriate lifespan formula.