Is this dog age calculator free?

Yes, completely free with no signup and no usage limits.

Does my data leave my device?

No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.

Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.

Convert your dog's age to human equivalent years, adjusted for breed size.

Dog's age (years) Breed size

Enter your dog's current age in years (decimals allowed, e.g. 1.5 for 18 months).
Select your dog's breed size — small, medium, or large.
The human-equivalent age updates instantly below.

Is this dog age calculator free?: Yes, completely free with no signup and no usage limits.
Does my data leave my device?: No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.
Does it work on mobile?: Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.

Last updated: 2026-05-20 By jarvisbox