How accurate is the pet age calculator?

Our pet age calculator uses modern veterinary research and scientific formulas, not the outdated "multiply by 7" rule. It accounts for species differences and breed sizes to provide accurate age conversion from pet years to human years.

Why do small and large dogs age differently?

Large breed dogs age faster than small breeds due to their accelerated growth and metabolism. Our dog age calculator adjusts for breed size (small, medium, large) to give you the most accurate human age equivalent for your specific dog.

At what age is my pet considered a senior?

Dogs are typically considered seniors around 7-10 years old (depending on size), while cats become seniors around 7-11 years old. Use our pet age calculator to determine your pet's human age equivalent and plan appropriate senior care.

Pet Age Calculator

Calculate Your Pet's Age

Pet Type

Dog

Calculate dog years

Cat

Calculate cat years

Dog Size

Small

≤20 lbs (9 kg)

Medium

21-50 lbs (10-23 kg)

Large

51-100 lbs (24-45 kg)

Giant

>100 lbs (45 kg)

Pet's Age

Years

Months

Years

Please enter valid years (0-30)

Your Pet's Human Age

0 years

Life Stage

Based on your pet's age and size, this is their equivalent human age.

Did you know? The first year of a medium-sized dog's life is equal to approximately 15 human years.

Smaller breeds tend to live longer than larger breeds, and cats generally live longer than dogs.

Calculate Your Pet's Age in Human Years

Curious about your pet’s age in human years? Our Pet Age Calculator provides accurate age conversion for dogs and cats using modern veterinary research. Simply enter your pet’s age and breed size to discover their equivalent human age instantly.

Understanding your dog age in human years or using a cat age calculator helps you provide better care for your furry friend. Our tool uses scientific formulas rather than the outdated “multiply by 7” rule, giving you precise results based on your pet’s species and size.

Knowing your pet’s human age equivalent helps you choose age-appropriate nutrition, plan suitable exercise routines, and schedule proper veterinary checkups. Whether you have a playful puppy or a senior cat, our pet age calculator makes it easy to understand your companion’s life stage and provide the best possible care.