Boxer Dog Weight by Age 2026: Complete Male and Female Growth Chart

If you’ve got a Boxer puppy, you’ve probably already noticed how fast they go from a chunky little squirmer to a gangly, floppy-legged teenager. And then, seemingly overnight, into a muscular powerhouse that thinks it’s still a lap dog. Tracking your Boxer’s weight and height as they grow isn’t just satisfying – it’s one of the best ways to catch problems early and make sure they’re getting everything they need.

This guide gives you complete growth charts for both male and female Boxers, feeding amounts by age, and a clear breakdown of what to expect at each development stage. Bookmark it – you’ll come back to it more than once in that first year.

How Boxers Grow: Understanding the Stages

Boxers don’t just get bigger – they go through very distinct phases. Knowing what stage your dog is in helps you set the right expectations and avoid unnecessary panic when they look “off” for a few weeks.

Newborn to 3 months: This is all about rapid, almost shocking growth. Puppies are born around half a pound and can hit 20-30 lbs by 3 months. Their bodies are growing so fast that coordination is basically a suggestion at this point.

3 to 6 months: The biggest growth window for Boxers. You’ll notice them shooting up in height. Don’t be surprised if they look a little disproportionate – long legs, narrow chest, big head. That’s normal. Their bones are lengthening faster than their muscles can fill in. This is also when feeding your Boxer puppy the right food becomes really critical. High-quality large breed puppy formula supports bone density without pushing growth too fast.

6 to 12 months: Height gain slows down, but they’re still adding weight and starting to develop that signature Boxer muscle. This is the teenage phase – energy through the roof, attention span of a goldfish. They might look a bit gangly or underweight during growth spurts. Check the charts below and compare to their age before worrying.

12 to 18 months: Most Boxers hit close to their adult height around here. Males will be approaching 23-25 inches, females around 21-24 inches. Weight is still climbing.

18 months to 3 years: This is the “filling out” phase. Your Boxer’s chest broadens, their muscle mass increases, and they start looking like the powerful athlete the breed is known for. Don’t expect your Boxer to be mentally mature until at least 2-3 years either. Physically adult, mentally still kind of a puppy.

Male Boxer Weight and Height by Age

These figures are breed-standard averages. Your individual dog’s genetics, diet, and activity level will influence where they land. Always consult your vet if your Boxer is significantly outside these ranges.

Age	Weight (lbs)	Weight (kg)	Height (inches)	Height (cm)
Newborn	0.5-1	0.2-0.45	3-4	7.6-10.2
1 month	5-10	2.2-4.5	6-7	15.2-17.8
2 months	10-20	4.5-9	8-11	20.3-28
3 months	20-30	9-13.6	11-14	28-35.6
4 months	30-40	13.6-18	14-17	35.6-43.2
5 months	40-50	18-22.6	17-20	43.2-50.8
6 months	50-60	22.6-27.2	20-23	50.8-58.4
7 months	55-65	25-29.5	21-24	53.3-61
8 months	60-70	27.2-31.8	22-25	56-63.5
9 months	65-75	29.5-34	23-26	58.4-66
10 months	70-80	31.8-36.3	24-27	61-68.6
11 months	75-85	34-38.5	24-27	61-68.6
12 months	80-90	36.3-40.8	24-27	61-68.6
2 years	65-85	29.5-38.5	23-25	58.4-63.5
3 years	65-85	29.5-38.5	23-25	58.4-63.5

Note: You’ll notice male weight actually drops slightly from the 12-month peak as puppies transition off the higher caloric needs of rapid growth. This is normal.

Female Boxer Weight and Height by Age

Female Boxers follow a similar growth curve but run consistently lighter and a little shorter than males. They also tend to reach their adult size slightly earlier.

Age	Weight (lbs)	Weight (kg)	Height (inches)	Height (cm)
Newborn	0.5-1	0.2-0.45	3-4	7.6-10.2
1 month	4-9	1.8-4	5-6	12.7-15.2
2 months	9-18	4-8.2	7-10	17.8-25.4
3 months	18-28	8.2-12.7	10-13	25.4-33
4 months	28-37	12.7-16.8	13-16	33-40.6
5 months	37-47	16.8-21.3	15-18	38.1-45.7
6 months	45-55	20.4-24.9	17-20	43.2-50.8
7 months	50-60	22.6-27.2	18-21	45.7-53.3
8 months	55-65	24.9-29.5	19-22	48.3-55.9
9 months	58-68	26.3-30.8	19-22	48.3-55.9
10 months	60-70	27.2-31.8	20-23	50.8-58.4
11 months	62-72	28.1-32.6	20-23	50.8-58.4
12 months	63-73	28.6-33.1	20-23	50.8-58.4
2 years	55-70	24.9-31.8	21-24	53.3-61
3 years	55-70	24.9-31.8	21-24	53.3-61

How Much to Feed Your Boxer by Age

Feeding a Boxer puppy is different from feeding an adult dog – and getting it right matters more than most people realize. Too many calories during the growth phase can push bones to develop too quickly, which raises the risk of joint problems down the road. Not enough, and you’ll see stunted growth and low energy.

The amounts below are general starting points. Always check your specific food’s feeding guidelines and adjust based on your dog’s body condition, not just the scale.

8-12 weeks (puppy, 10-20 lbs): 3-4 small meals per day, about 1/2 to 1 cup each. Puppies this age have tiny stomachs but huge caloric needs. Stick to a quality Boxer puppy formula designed for large breed pups.

3-6 months (20-50 lbs): 3 meals per day, roughly 1-2 cups each. This is peak growth, so don’t restrict calories unless your vet specifically recommends it. Adding some supplements for Boxer puppies like omega-3s and joint support can be worth it during this phase.

6-12 months (50-80 lbs): Transition to 2 meals per day, around 2-2.5 cups each. Some Boxers try to wolf down everything at once – slow feeders or puzzle bowls help prevent bloat, which Boxers are unfortunately prone to.

12+ months (adult, 65-85 lbs male / 55-70 lbs female): 2 meals per day, 2.5-4 cups total depending on the food’s caloric density and your dog’s activity level. Check out our list of the best dog foods for Boxers if you’re looking to switch to an adult formula.

Always keep fresh water available and avoid exercising your Boxer immediately after eating. That’s a real bloat risk with this breed.

What Healthy Boxer Growth Actually Looks Like

Here’s the thing about Boxers: they’re supposed to look a little weird at certain ages. If you’re comparing your 5-month-old to that gorgeous adult Boxer you saw at the park, you’ll stress yourself out for no reason.

At 4-6 months, it’s completely normal for Boxers to look lanky, uncoordinated, and almost comically out of proportion. Their legs grow faster than their chest and rear fill in. Front end looks big, back end looks small. That’s fine.

By 9-12 months, most Boxers start looking more “put together” but they’re still lean. You might be able to see a slight rib outline – that’s actually fine for a young, active dog. What you don’t want is ribs you can see clearly from 10 feet away, or a dog where you can’t feel ribs at all because of fat padding.

At 18 months to 2 years, your Boxer should really start developing that chest and shoulder mass that makes the breed so striking. This is when joint supplements for Boxers become worth adding to their routine – their joints have been working hard through all that growth, and proactive care pays off.

And for senior Boxers (7+ years), weight management gets even more important. Muscle mass tends to decrease while fat can creep up if feeding doesn’t adjust. Senior Boxer supplements can help maintain muscle tone and joint comfort as they age.

When to Bring It Up With Your Vet

Most weight fluctuations in Boxer puppies are completely normal. But a few situations call for a vet conversation:

Significant drop below the chart range: If your Boxer is more than 10-15% below the average for their age, that’s worth checking. Parasites, food quality issues, and underlying health problems can all affect growth.

Rapid unexplained weight loss in adults: Adult Boxers shouldn’t be dropping weight without a reason. If yours is losing more than a pound or two without a diet change, book a checkup.

Noticeable limping or reluctance to exercise: This can indicate joint problems that are affecting how your Boxer moves and builds muscle. Boxers are prone to hip dysplasia and degenerative conditions – early diagnosis makes a real difference.

Belly looks disproportionately large on a thin puppy: Could indicate parasites, which are common in young puppies and easy to treat but can affect growth if left alone.

Monthly weigh-ins at home (stand on a scale holding your dog, then subtract your own weight) give you a running trend that’s much more useful than a single snapshot number.

While you’re keeping your Boxer healthy, don’t forget basics like flea and tick prevention for Boxers – parasites can affect appetite and nutrient absorption more than most owners realize. And if you’re working on building good habits young, online training courses for Boxers are a great way to channel all that puppy energy productively.

Frequently Asked Questions About Boxer Dog Weight by Age

How much should a 3-month-old Boxer weigh?
At 3 months, male Boxer puppies typically weigh 20-30 lbs and females weigh 18-28 lbs. There’s natural variation based on litter size, genetics, and diet, but if your pup falls within a few pounds of these ranges, you’re in good shape.

When do Boxers reach their full adult weight?
Boxers hit most of their adult weight around 12-18 months, but they keep filling out with muscle until they’re about 2-3 years old. Don’t expect your Boxer to look fully “built” until that third birthday.

How tall do Boxers get?
Male Boxers stand 23-25 inches at the shoulder. Females are slightly smaller at 21-24 inches. Height is mostly determined by genetics – you can’t change it with diet, but you can absolutely affect their muscle mass and overall condition.

Is my Boxer puppy too thin?
Run your fingers along their ribcage. If you can feel individual ribs without pressing hard, that’s normal and healthy for a growing Boxer. If you can clearly see the ribs from across the room, or if there’s no fat padding at all over the hip bones, talk to your vet. Compare their weight to the chart above first, though – many Boxer owners worry about a weight that’s actually perfectly normal for the age.

How much should I feed my 6-month-old Boxer?
At 6 months, most Boxers need about 3-4 cups of a quality large breed puppy food per day, split into two or three meals. Check your specific food’s feeding guide and adjust based on body condition. At this age they’re still growing fast, so don’t restrict calories unless your vet advises it.

Do male and female Boxers grow at the same rate?
Pretty much, yes – especially in the early months. Males tend to be noticeably larger by 4-6 months and that gap stays through adulthood. Females often reach their adult height a little earlier, but both sexes follow the same general pattern of fast growth in the first year followed by muscle development into year two.

Can spaying or neutering affect Boxer growth?
Yes, it can. Early spay/neuter (before 6-12 months) can delay growth plate closure, which sometimes results in dogs that are slightly taller than they’d otherwise be. There’s also emerging research on hormonal effects on joint health. Talk to your vet about timing – this is especially relevant for large breeds like Boxers.

What’s the best way to track my Boxer’s growth at home?
Weigh them monthly by stepping on a bathroom scale while holding your dog, then subtracting your own weight. For height, have them stand squarely and measure from the floor to the top of their shoulder blade (the withers). Log it each month. The trend over time tells you much more than any single number.

Are Boxers prone to weight-related health problems?
Yes. Boxers are prone to bloat (gastric dilatation-volvulus), which is life-threatening and can be triggered by eating too fast or exercising right after meals. They’re also susceptible to hip dysplasia, which is worsened by excess weight. Keeping your Boxer at a healthy weight is one of the most important things you can do for their long-term health. A good supportive dog bed for your Boxer also helps with joint comfort as they age.

Should I keep my Boxer on puppy food past 12 months?
Most vets recommend keeping large breed Boxers on puppy formula until 18 months. Their skeletal development continues past 12 months and they benefit from the different calcium-to-phosphorus ratios in puppy food. After 18 months, transition to a quality adult large breed formula over 7-10 days.

Bottom Line

Boxer dog weight by age is a moving target – and that’s exactly how it should be. These dogs go through a lot of changes in their first two to three years, from a wobbly 10-pound puppy to a 70-pound muscle dog with the personality of a court jester.

Use the charts above as a guide, not a strict rule. The most important things are a consistent upward trend in the first year, a body condition score you can feel rather than just see on a scale, and a vet you trust to flag anything genuinely concerning.

Keep up with regular weigh-ins, feed a quality large breed formula appropriate for their age, and stay on top of joint health as they hit adulthood. Boxers are one of the most rewarding breeds you’ll ever own – and watching them grow from that squirmy little puppy into a full-grown powerhouse is something most Boxer owners never get tired of.