Date & time Pets
Dog age calculator
Date of birth
On this date
Age in years —
The same age, other ways
Exactly —
In months —
In weeks —
In days —
In hours —
Born on a —
Next birthday —
Days to go —
Turning —
Note Enter a date of birth
Exact age · convert to human years separately
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A dog age in its own years is the same calendar arithmetic as a person. The human-equivalent conversion is a separate step and depends heavily on size — a Great Dane at seven is elderly while a Chihuahua is middle-aged.
How to work out a dog age
1 Enter the date of birth, or the best estimate from a rescue.
2 Read the exact age in years, months and days.
3 Use the dog years calculator to convert to human terms by size.
4 Weeks and months are the useful units for a puppy.
Rescue dogs rarely come with a date of birth, and the estimate usually comes from teeth. Puppies have a predictable dental timeline that gives an age to within weeks up to about seven months; after that, wear and tartar give only a rough band, and a vet estimate of "three to five years" is genuinely as precise as it gets. Recording an approximate birth date and sticking to it is more useful than re-estimating.
Questions
From its date of birth, the same as any age. Converting to human years is a separate step.
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