Dog and cat age in human years
How old would your pet be if it were human?
How it works
Common vet guide: year one is about 15 human years, year two about 9, then 4 to 7 per year depending on size (large dogs age faster).
Results are for guidance only and do not replace professional advice.
Worked example
With the default values:
- Pet's age (years)5
- PetMedium dog (10–25 kg)
you get:
- Human age39 years
- Life stageAdult
Frequently asked questions
How does the “Dog and cat age in human years” tool work?
Common vet guide: year one is about 15 human years, year two about 9, then 4 to 7 per year depending on size (large dogs age faster).
What do I need to enter?
Just fill in: pet's age, pet. The result updates as you type.
Can you give an example?
Pet's age (years): 5; Pet: Medium dog (10–25 kg) → Human age: 39 years; Life stage: Adult.
Is this calculator free, and is my data private?
Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.