Large breed

Boxer Growth Chart

Male adult weight65–80 lb

Female adult weight50–65 lb

Boxers are muscular working dogs with a late chest fill that can continue into the second year. Puppies often appear lean during adolescent growth spurts. Use breed and sex ranges together with current age for a realistic adult estimate.

Expected Boxer puppy weight at key ages (lb)
Age	Expected weight (low–high)
8 weeks	6.2–20.3 lb
12 weeks	9.4–25.4 lb
16 weeks	12.3–30.1 lb
20 weeks	14.9–34.2 lb
24 weeks	17.5–38.3 lb
32 weeks	22.2–45.8 lb
40 weeks	26.6–52.9 lb
1 year	32.8–62.9 lb
1y 26w	45.3–80 lb
2 years	46.8–80 lb

Boxer Growth Stages

Understanding the typical growth stages helps you know what to expect as your Boxer puppy grows.

Neonatal

0–2 weeks

Puppies are born with eyes and ears closed, relying entirely on their mother. Rapid weight gain occurs during this period.

Socialization

3–12 weeks

Eyes and ears open. Puppies begin to explore, play, and learn social behaviors. This is a critical period for development.

Juvenile

3–8 months

Rapid growth continues. Puppies become more independent, start teething, and develop coordination.

Adolescent

8–14 months

Growth rate begins to slow. Puppies reach sexual maturity and may test boundaries. Muscle mass develops.

Young Adult

14–18 months

Growth is nearly complete. Your puppy is filling out and approaching adult proportions.

Adult

18+ months

Your puppy has reached their full adult size. Weight should remain relatively stable with proper nutrition.

Enter your puppy's details to see the estimate

How much will my Boxer puppy weigh as an adult?

As a large breed, Boxers usually reach an estimated adult range of 50–80 lb overall. Sex matters: males typically finish around 65–80 lb and females around 50–65 lb. Track weekly weigh-ins to see whether your puppy trends toward the lower or upper end.

At what age is a Boxer fully grown?

As a large breed, most Boxers finish growing between 14 and 18 months. Boxers are known for late chest fill that can extend into the second year. Growth charts work best when you track several weekly weights rather than relying on one measurement taken during a growth spurt or quiet phase.

How accurate is a Boxer puppy weight chart?

Chart accuracy for Boxers depends on individual build. Differences in late chest fill in the second year can shift results, since lean adolescent phases look underweight on generic charts. Weekly weigh-ins on the same scale and time of day typically improve estimate quality over time.