Calculate your pet's age in human years. Accurate dog age calculator (by size) and cat age calculator. See how old your furry friend really is.
Understand Your Pet's Life Stage
Ever wondered how old your dog or cat really is? Our Pet Age Calculator uses the latest veterinary guidelines to give you a more accurate conversion than the old '7-year rule'. By factoring in your pet's size (for dogs) and species, we help you understand their life stage, health needs, and how to care for them better.
Dog Age Calculation Formula
The calculation depends on the dog's weight category:
Cat Age Calculation Formula
Cats follow a more consistent aging pattern than dogs.
Frequently Asked Questions
Q:How do you calculate dog years to human years?
The old 'multiply by 7' rule is a myth. The first year of a dog's life is roughly equal to 15 human years. The second year is about 9 years. After that, each dog year equals approximately 4-6 human years, depending on the dog's size (Small, Medium, Large, Giant).
Q:How do you calculate cat years to human years?
Cats age differently than dogs. The first year of a cat's life is about 15 human years. The second year adds 9 years (total 24). After the second year, each additional cat year is approximately 4 human years.
Q:Why does dog size matter for age calculation?
Larger dogs generally age faster and have shorter lifespans than smaller dogs. For example, a 7-year-old Great Dane (Giant) is considered 'senior' (around 50 human years), while a 7-year-old Chihuahua (Small) is still in their prime (around 44 human years).
Q:What is the average lifespan of a dog vs. a cat?
The average lifespan of a dog ranges from 10-13 years, with small breeds often living longer (15+ years). Cats generally live longer, with an average lifespan of 12-18 years, and many reaching 20 years or more.