Border Terrier Age Calculator: Dog Years to Human Years

Border Terrier age in human years

Dog years	Human years	Life stage
1	15	Adolescent
2	24	Adult
6	40	Adult
10	56	Senior begins
13	68	Senior
15	76	Geriatric

Figures based on The Royal Kennel Club's published small-breed guidance, as tabulated by Purina UK. For an exact figure, try the Dog Years calculator.

The Border Terrier is classified by The Royal Kennel Club within the smaller ageing band, typically weighing 5.1–7.1 kg as an adult, with a median life expectancy of around 14.2 years, according to a 2024 analysis of UK veterinary records by Dogs Trust. Bred on the England-Scotland border to run alongside foxhounds and bolt foxes from their dens, the Border Terrier is tough, affectionate, and one of the longer-lived and generally healthiest terrier breeds.

What this means for your Border Terrier

Paroxysmal gluten-sensitive dyskinesia, sometimes called "Spike's disease," is a movement disorder specific to the breed, triggered by gluten in the diet — a gluten-free diet can resolve symptoms in affected dogs. Hip dysplasia is uncommon but reported occasionally.

Generally a robust breed, Border Terriers benefit from staying at a healthy weight throughout life, as they can be prone to overeating given the chance.

When is a Border Terrier considered a senior?

Under The Royal Kennel Club's size-adjusted guidance, small breeds like the Border Terrier are generally considered senior from around 10 dog years old.

Related reading: Is the ×7 Rule Real? · Dog Life Stages Explained · Signs Your Dog Is Entering Its Senior Years

Compare: vs Jack Russell Terrier · vs West Highland White Terrier · vs Staffordshire Bull Terrier