Dog age calculator
Forget the old "multiply by 7" rule, it's never been accurate. How fast a dog ages depends far more on their size than a flat multiplier. Pop in their age and size below for a better estimate.
| Roughly equivalent to | — |
|---|---|
| Life stage | — |
A general estimate based on commonly published size/age guidance, not an exact science, every dog ages differently. For a proper read on your own dog's life stage, ask your vet.
Bigger dogs tend to mature faster early on but age faster in later life too, which is why a giant breed and a small breed of the same age can be at very different life stages. It's also part of why exercise needs change with age, my guide on how often your dog needs walking covers how that shifts for puppies and older dogs.
Got a dog with more birthdays ahead than behind? My guide to choosing a dog walker and guide to choosing a boarder are worth a read whatever their age.
Where this advice comes from
The old "multiply by 7" rule and the size-based approach explained here are covered well by:
- WebMD, Calculate Your Dog's Age, medically reviewed, the source for the medium-dog reference points used above
- MSD Veterinary Manual, Dog Years Versus Human Years
This is general guidance, not advice about your own dog, every dog ages differently, so if you're ever concerned about your dog's health or life stage, please ask your vet.