Cavalier King Charles Spaniel Age Calculator: Dog Years to Human Years

Cavalier King Charles Spaniel 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 Cavalier King Charles Spaniel is classified by The Royal Kennel Club within the smaller ageing band, typically weighing 5.4–8.2 kg as an adult, with a median life expectancy of around 11.8 years, according to a 2024 analysis of UK veterinary records by Dogs Trust. Named after King Charles II, who was rarely seen without one, the breed is prized for its gentle, affectionate temperament and striking silky coat.

What this means for your Cavalier

Cavaliers are sociable, easy-going dogs that thrive on companionship and don't cope well with being left alone for long periods. Their long, floppy ears need regular checking and cleaning, as trapped moisture can lead to ear infections.

The breed's best-known health concern is mitral valve disease, a heart condition that affects Cavaliers at a notably higher rate and often at a younger age than other breeds — regular vet check-ups, including listening for heart murmurs, become especially important as they age. Syringomyelia, a neurological condition linked to the breed's skull shape, and luxating patella are also worth being aware of.

When is a Cavalier King Charles Spaniel considered a senior?

Under The Royal Kennel Club's size-adjusted guidance, small breeds like the Cavalier King Charles Spaniel are generally considered senior from around 10 dog years old — though given the breed's heart health profile, many vets recommend starting regular cardiac checks well before then.

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

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