How Big Will My Cavalier King Charles Spaniel Get?
Cavalier King Charles Spaniels are a small breed that typically weigh 5–8 kg (11–18 lbs) at full size. Small breeds typically reach their adult weight around 10–12 months of age.
Cavalier King Charles Spaniel Size at a Glance
Adult Weight
5–8 kg
11–18 lbs
Adult Height
30–33 cm
12–13 in
Size Category
small
Fully Grown By
10–12 mo
Cavalier King Charles Spaniel Growth Chart
Cavalier King Charles Spaniel Weight by Age
Predict Your Cavalier King Charles Spaniel Puppy's Adult Weight
Enter your puppy's current age and weight for a personalized prediction.
Open Weight CalculatorCavalier King Charles Spaniel Growth & Development
Small breeds typically reach their adult weight around 10–12 months of age. They grow quickly in the first few months and then level off.
A Cavalier King Charles Spaniel's growth rate is fastest in the first 6 months of life. During this period, proper nutrition and regular vet checkups ensure your puppy stays on a healthy growth trajectory.
Factors that influence your Cavalier King Charles Spaniel's adult size include genetics (parent size), nutrition quality, spay/neuter timing, and overall health. Males typically weigh 10–20% more than females.
Frequently Asked Questions
How big will my Cavalier King Charles Spaniel puppy get?
A full-grown Cavalier King Charles Spaniel typically weighs between 5–8 kg (11–18 lbs). Males tend to be on the larger end of the range while females are usually smaller.
When do Cavalier King Charles Spaniels stop growing?
Small breeds typically reach their adult weight around 10–12 months of age. They grow quickly in the first few months and then level off. Individual dogs may reach their full size slightly earlier or later depending on genetics, diet, and overall health.
How much should a Cavalier King Charles Spaniel puppy weigh at 12 weeks?
At 12 weeks, a Cavalier King Charles Spaniel puppy typically weighs around 2–2.6 kg (4–6 lbs), which is roughly 30–40% of their adult weight.
How can I tell if my Cavalier King Charles Spaniel puppy is the right weight?
Compare your puppy's weight to the growth chart above. A healthy Cavalier King Charles Spaniel puppy should follow a steady growth curve. If your puppy's weight deviates significantly from the expected range, consult your veterinarian.
Learn More About Cavalier King Charles Spaniels
Explore the full breed profile, find name ideas, or check ownership costs.