Boxer puppy weight chart
The ranges below run from a puppy that will end up at the light end of the breed (50 lb) to one heading for the heavy end (80 lb). Males usually track the upper numbers and females the lower.
| Age | Weight (lb) | Weight (kg) | % of adult |
|---|---|---|---|
| 8 weeks | 8.5 to 14 | 3.9 to 6.4 | 17% |
| 10 weeks | 11 to 18 | 5 to 8.2 | 23% |
| 12 weeks | 14 to 22 | 6.4 to 10 | 28% |
| 14 weeks | 17 to 27 | 7.7 to 12 | 34% |
| 16 weeks | 20 to 32 | 9.1 to 15 | 40% |
| 5 months | 27 to 43 | 12 to 20 | 54% |
| 6 months | 32 to 51 | 15 to 23 | 63% |
| 7 months | 35 to 56 | 16 to 25 | 71% |
| 8 months | 39 to 62 | 18 to 28 | 77% |
| 9 months | 41 to 66 | 19 to 30 | 82% |
| 10 months | 43 to 69 | 20 to 31 | 87% |
| 12 months | 47 to 74 | 21 to 34 | 93% |
| 15 months | 49 to 78 | 22 to 35 | 97% |
| 18 months | 50 to 79 | 23 to 36 | 99% |
| 24 months | 50 to 80 | 23 to 36 | 100% |
How Boxers grow
Bouncy, playful and very patient with kids. As a large breed, a Boxer is roughly half grown at about 5 months and reaches adult size at around 18 to 24 months. Boxers reach their height around a year old but keep adding muscle until about two.
Feed a Boxer puppy a food labeled for large-breed puppies (or "all life stages including growth of large size dogs"). These foods control calcium and calories so bones grow at a steady pace, which lowers the risk of hip and elbow problems.
Is my Boxer puppy underweight or overweight?
The scale only tells half the story. Check your puppy's body condition: you should be able to feel the ribs easily under a thin layer of fat, and see a waist when you look down from above. A puppy that tracks low on the chart but has good energy and body condition is usually just going to be a smaller adult. Talk to your vet if your puppy stops gaining for more than two weeks, loses weight, or has persistent diarrhea.
Frequently asked questions
How big will my Boxer puppy get?
Most Boxers finish at 50 to 80 lb. Enter your puppy’s age and weight in the calculator above for a personal estimate.
When does a Boxer stop growing?
Most Boxers reach adult height and weight at around 18 to 24 months, and often keep adding muscle for a few months after that.
How much should a Boxer puppy weigh at 12 weeks?
Usually around 14 to 22 lb, which is about 28% of adult weight. Lighter or heavier can still be normal if your vet is happy with your puppy’s body condition.