📅 Dog Age Calculator

Forget the old "multiply by 7" rule. Convert dog years to human years using the latest epigenetic clock science from Cell Systems. Adjusted for breed size — small dogs age slower, large dogs age faster after year two.

Enter Your Dog's Details

Dog's Name (optional)

Age (years)

Age (months)

Breed Size

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Human Years Equivalent

Dog Age: —

Breed Size: —

Life Stage: —

Expected Lifespan: —

Formula: Human Age = 16 × ln(dog age) + 31, adjusted for breed size. Based on research published in Cell Systems. Small dogs age slower after year 2; giant dogs age significantly faster.

Life Stage Progress

Saved Dogs

Date	Name	Dog Age	Breed	Human Age	Life Stage	Actions

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Disclaimer: This calculator uses the formula Human Age = 16 × ln(dog age) + 31, adjusted for breed size based on epigenetic clock research published in Cell Systems. This is an estimate for informational purposes and not a replacement for veterinary assessment of your dog's actual health and aging status.