Wondering how big your Flat-Coated Retriever puppy will get? Use the calculator below: enter your puppy’s age and current weight to see a personalized growth curve and an adult weight estimate.
Estimates combine your puppy’s current trajectory with typical growth curves for this breed and size class. Individual dogs vary — nutrition, genetics and neuter timing all matter. For health concerns, ask your vet.
The Flat-Coated Retriever is a large breed. Adult males typically weigh 60–80 lb (27.2–36.3 kg) and females 55–70 lb (24.9–31.8 kg). Most Flat-Coated Retrievers reach about half their adult weight around 4.5 months, hit 90% by roughly 9.9 months, and are fully grown near 16 months. Large breeds keep growing well past their first birthday, mostly filling out in the chest.
When do Flat-Coated Retrievers stop growing?
Most Flat-Coated Retrievers reach their full adult height and weight by about 16 months. Growth is fastest before 4.5 months, then slows steadily — by 9.9 months your puppy will be about 90% of its final size.
How much should a Flat-Coated Retriever puppy weigh at 4 months?
A typical 4-month-old Flat-Coated Retriever weighs roughly 25–33 lb, about 44% of its adult weight. Use the calculator above with your puppy’s exact weight for a personalized estimate — individual dogs vary.