Cavalier King Charles Spaniel age in human years

Cavalier King Charles Spaniels are a small breed. Here is the full age chart and what each stage means.

Updated October 2026Numbers calculated for this page

Cavalier King Charles Spaniels are a small breed (typically 13–18 lb), so they age about 4 human years for every dog year after age two. A 5-year-old Cavalier King Charles Spaniel is about 36 in human years, and the senior years usually start around age 10.

12–15 yrstypical life expectancy

76human years at age 15

~10senior years begin

13–18 lbtypical adult weight

Cavalier King Charles Spaniel age chart

Dog age	Human years	Life stage
1 year	15	Young adult
2 years	24	Young adult
3 years	28	Mature adult
4 years	32	Mature adult
5 years	36	Mature adult
6 years	40	Mature adult
7 years	44	Mature adult
8 years	48	Mature adult
9 years	52	Mature adult
10 years	56	Mature adult
11 years	60	Senior
12 years	64	Senior
13 years	68	Senior
14 years	72	Golden years
15 years	76	Golden years
16 years	80	Golden years
17 years	84	Golden years

Uses the common size-based chart: the first year equals about 15 human years, the second adds about 9, and each year after that adds 4 (small), 5 (medium), 6 (large) or 7 (giant). It is an estimate, not a medical measure.

What each stage means for a Cavalier King Charles Spaniel

Young adult (1–3): still learning. Keep training consistent and set the healthy weight now; for a Cavalier King Charles Spaniel that is usually within 13–18 lb.
Mature adult (3–9): yearly checkups, dental care and steady exercise. Watch the waistline as activity drops.
Senior (10+): many vets suggest checkups every six months, plus attention to joints, teeth and weight changes.

How much a Cavalier King Charles Spaniel eats

A spayed or neutered adult around 16 lb needs roughly 480 calories a day, about 1.3 cups of a typical 380-calorie-per-cup dry food. See the full feeding guide for a 15 lb dog.

Planning the budget? See what a Cavalier King Charles Spaniel costs per year.

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Other small breeds

French Bulldog Miniature Poodle Toy Poodle Yorkshire Terrier Miniature Schnauzer Shih Tzu Pomeranian Boston Terrier Havanese Shetland Sheepdog

Any small dog: see how old a 7-year-old small dog is or try the dog age calculator.

Questions people ask

How old is a 10-year-old Cavalier King Charles Spaniel in human years?

About 56, using the small-breed chart.

How long do Cavalier King Charles Spaniels live?

Typically 12 to 15 years, though genetics, weight, diet and vet care all matter.

When is a Cavalier King Charles Spaniel considered a senior?

Around age 10, roughly the last quarter of the breed's typical lifespan.

The Paw Plan shares general pet care information, not veterinary advice. Figures on this page are estimates calculated from the assumptions shown. Every pet is different, so check with your vet about yours.