How big is a American Bully full grown?

30 to 120 pounds across every size this breed comes in, standing 19 to 23 inches at the shoulder. Those figures come from the breed standard.

How can I tell how big my American Bully puppy will get?

Weigh your puppy and enter its age in the calculator on this page. It is already set to the giant growth curve for this breed, so it works backwards from where your puppy is now rather than from the breed average. Four to six months is when the estimate is most reliable.

When does a American Bully stop growing?

Weight gain slows to almost nothing at around 13 months for a dog in the giant size class, and the chest and frame keep filling out for months after that. Height finishes earlier than weight in every breed.

How big is a pocket bully full grown?

A Pocket male stands 14 inches to just under 17 at the shoulder, and a female 13 to just under 16. That is the UKC standard. The standard sets no weight, and published general figures put most Bullies between 30 and 85 pounds.

How big does an XL bully get?

Over 20 inches up to 23 inches for a male, and over 19 up to 22 for a female. Weight varies widely and is not part of the standard.

Is a micro bully a recognized size?

No. The UKC recognizes Pocket, Standard, Classic and XL. Micro is a seller's word for a dog under Pocket height, and it carries no official meaning.

When is an American Bully full grown?

The UKC itself treats a year as the dividing line, because dogs are only sorted into varieties at that age. Weight keeps climbing after that in the larger varieties.

American Bully full grown

The American Bully is sorted by height, not weight. A Pocket male stands 14 to under 17 inches, a Standard 17 to 20 inches, and an XL over 20 inches up to 23 inches. The UKC standard sets no weight at all; published figures put adults between 30 and 85 pounds, with XLs going well above that.

full grown, across every size: 30 to 120 lbfull grown, across every size
at the shoulder: 13 to 23 inat the shoulder
before growth slows to a crawl: 13 monthsbefore growth slows to a crawl

American Bully weight calculator

Answers update as you move the sliders.

American Bully size

Age16 weeks

Weight today33.5 lb

Expected adult size

Giant: over 88 lb as an adult.

SexOptional

Likely adult weight

95lb

8 in 10 land between: 76 to 122 lb
Fully grown: around 13 months

Size class: Giant, over 88 lb

Age in monthsSo farProjected

Fair. Four to five months is the usual time to make this estimate. It is reasonable now, but the range is still wide.

Estimate only. For health questions, ask your vet. Mixed breeds can land outside the range.

See the expected weight month by month

Age	Likely weight	Range
2 months	14.3 lb	7.7 to 26 lb
3 months	25 lb	14.8 to 42 lb
4 months	37 lb	23 to 60 lb
5 months	50 lb	32 to 78 lb
6 months	60 lb	40 to 93 lb
7 months	69 lb	46 to 104 lb
8 months	76 lb	52 to 112 lb
9 months	81 lb	54 to 117 lb
10 months	84 lb	58 to 120 lb
11 months	86 lb	60 to 123 lb
12 months	87 lb	61 to 124 lb
13 months	89 lb	64 to 125 lb
14 months	90 lb	64 to 126 lb
15 months	90 lb	65 to 126 lb
16 months	91 lb	66 to 127 lb
17 months	92 lb	67 to 127 lb
18 months	94 lb	73 to 127 lb

Scroll the table sideways to see every column.

Expected weight month by month, from the same estimate.

In short

Key takeaways

A full grown American Bully weighs 30 to 120 lb across all its sizes.
The weight and height here come from the official breed standard.
Most of the growing is done by about 13 months.
A short coat keeps the grooming bill low.
"micro" is a seller's word, not a recognized size.

3 sizes

The 3 sizes

Each size has its own adult range and its own growth curve. Switch between them in the calculator above.

XL American Bully

Giant size class · Category VI (40 kg and over)

Working estimate

adult weight: 70 to 120 lbadult weight
height at the shoulder: 19 to 23 inheight at the shoulder
most growing done by: 13 monthsmost growing done by

	Weight	Height at the shoulder
Male	Not stated	20 to 23 in
Female	Not stated	19 to 22 in

Scroll the table sideways to see every column.

Heights are the UKC standard, which sets no weight. The weight band here is our reading of the general figure A-Z Animals gives (30 to 85 pounds across the breed, with XLs reaching 150 pounds or more) and should be treated as a rough guide.

XL American Bully growth chart. Weight runs from about 11 to 18 pounds at 2 months, up to about 70 to 119 pounds at 18 months, for a full grown American Bully. — Estimated from the adult weight range above and the growth standard for the giant size class. The band runs from the low end of the adult range to the high end.

See the XL American Bully weight by age as a table

Age	Low end	High end
2 months	10.6 lb	18.2 lb
3 months	18.3 lb	31.3 lb
4 months	27.8 lb	47.6 lb
5 months	36.9 lb	63.3 lb
6 months	44.6 lb	76.5 lb
7 months	51 lb	87.4 lb
8 months	56 lb	96.1 lb
9 months	59.8 lb	102.5 lb
10 months	62.1 lb	106.5 lb
11 months	63.4 lb	108.7 lb
12 months	64.8 lb	111 lb
15 months	66.8 lb	114.5 lb
18 months	69.7 lb	119.5 lb

Scroll the table sideways to see every column.

Standard American Bully

Extra large size class · Category V (30 to under 40 kg)

Working estimate

adult weight: 50 to 85 lbadult weight
height at the shoulder: 16 to 20 inheight at the shoulder
most growing done by: 11 monthsmost growing done by

	Weight	Height at the shoulder
Male	Not stated	17 to 20 in
Female	Not stated	16 to 19 in

Scroll the table sideways to see every column.

Heights are the UKC standard. The weight band is our reading of a general published range, not a figure from the standard.

Standard American Bully growth chart. Weight runs from about 9 to 16 pounds at 2 months, up to about 50 to 85 pounds at 18 months, for a full grown American Bully. — Estimated from the adult weight range above and the growth standard for the extra large size class. The band runs from the low end of the adult range to the high end.

See the Standard American Bully weight by age as a table

Age	Low end	High end
2 months	9.2 lb	15.7 lb
3 months	15.3 lb	25.9 lb
4 months	22.2 lb	37.7 lb
5 months	28.3 lb	48.2 lb
6 months	33.8 lb	57.5 lb
7 months	38.2 lb	64.9 lb
8 months	41.5 lb	70.6 lb
9 months	43.5 lb	74 lb
10 months	45 lb	76.5 lb
11 months	45.9 lb	78 lb
12 months	46.6 lb	79.3 lb
15 months	47.9 lb	81.5 lb
18 months	49.8 lb	84.7 lb

Scroll the table sideways to see every column.

Pocket American Bully

Large size class · Category IV (15 to under 30 kg)

Working estimate

adult weight: 30 to 60 lbadult weight
height at the shoulder: 13 to 17 inheight at the shoulder
most growing done by: 11 monthsmost growing done by

	Weight	Height at the shoulder
Male	Not stated	14 to 17 in
Female	Not stated	13 to 16 in

Scroll the table sideways to see every column.

Heights are the UKC standard: a Pocket male is under 17 inches and no less than 14. The weight band is our reading of a general published range, not a figure from the standard.

Pocket American Bully growth chart. Weight runs from about 6 to 12 pounds at 2 months, up to about 30 to 60 pounds at 18 months, for a full grown American Bully. — Estimated from the adult weight range above and the growth standard for the large size class. The band runs from the low end of the adult range to the high end.

See the Pocket American Bully weight by age as a table

Age	Low end	High end
2 months	5.8 lb	11.6 lb
3 months	9.4 lb	18.8 lb
4 months	13.7 lb	27.3 lb
5 months	17.5 lb	35 lb
6 months	20.9 lb	41.9 lb
7 months	23.4 lb	46.8 lb
8 months	25.2 lb	50.5 lb
9 months	26.4 lb	52.8 lb
10 months	27.2 lb	54.4 lb
11 months	27.7 lb	55.4 lb
12 months	28.1 lb	56.2 lb
15 months	28.9 lb	57.8 lb
18 months	29.9 lb	59.8 lb

Scroll the table sideways to see every column.

Timing

When a American Bully stops growing

13 months

before weekly weight gain drops below a quarter of a percent of adult weight

In our figures, a dog in the giant size class has done almost all of its weight gain by about 13 months. After that the weekly gain drops below a quarter of a percent of adult weight, which is slow enough that you will not see it on the scales week to week.

Height finishes earlier than weight. The AKC puts small breeds at full size by 6 to 8 months, medium breeds at around 12 months, and giant breeds at 12 to 18 months, with some very large breeds taking up to 24. In a breed with several sizes, the smaller variety finishes first: that is a size effect, not a breed one.

13 months

before weekly weight gain drops below a quarter of a percent of adult weight

Sex

Male and female

The breed standard gives different figures for males and females, and they are in the tables above. In the growth data behind our calculator, a female of a given size class is also slightly further along toward her adult weight at any given age than a male, so telling the calculator which you have shifts the estimate by a few percent.

Variation

Why individual American Bullys differ

The UKC standard divides the breed by height at the withers and gives no weight figure for any variety. That is unusual, and it is why the weight bands on this page are marked as working estimates rather than verified figures.

All American Bullies are shown as Standard until they reach a year old, at which point they are separated into varieties. So a dog's variety is not settled until it has finished growing.

"Micro" and "XXL" are not UKC varieties. Micro is used for dogs under Pocket height and XXL for dogs above XL, and neither appears in the standard.

Sales words

"micro" is not a size

You will see American Bully puppies advertised as "micro", "XXL", "exotic". None of those is a recognized variety in any registry.

The Chihuahua Club of America, writing about its own breed, lists “Teacup, Pocket Size, Tiny Toy, Miniature or Standard” as labels attached to the breed and calls them incorrect and misleading, used to make a puppy seem more valuable. The same reasoning applies wherever the words turn up.

A puppy sold under one of these labels grows up as an ordinary American Bully, usually at the light end of the range and sometimes not. The label tells you nothing useful about adult size. Your puppy's own weight does, which is what the calculator on this page uses.

FAQ

Questions people ask

How big is a American Bully full grown?: 30 to 120 pounds across every size this breed comes in, standing 19 to 23 inches at the shoulder. Those figures come from the breed standard.
How can I tell how big my American Bully puppy will get?: Weigh your puppy and enter its age in the calculator on this page. It is already set to the giant growth curve for this breed, so it works backwards from where your puppy is now rather than from the breed average. Four to six months is when the estimate is most reliable.
When does a American Bully stop growing?: Weight gain slows to almost nothing at around 13 months for a dog in the giant size class, and the chest and frame keep filling out for months after that. Height finishes earlier than weight in every breed.
How big is a pocket bully full grown?: A Pocket male stands 14 inches to just under 17 at the shoulder, and a female 13 to just under 16. That is the UKC standard. The standard sets no weight, and published general figures put most Bullies between 30 and 85 pounds.
How big does an XL bully get?: Over 20 inches up to 23 inches for a male, and over 19 up to 22 for a female. Weight varies widely and is not part of the standard.
Is a micro bully a recognized size?: No. The UKC recognizes Pocket, Standard, Classic and XL. Micro is a seller's word for a dog under Pocket height, and it carries no official meaning.
When is an American Bully full grown?: The UKC itself treats a year as the dividing line, because dogs are only sorted into varieties at that age. Weight keeps climbing after that in the larger varieties.

Method

How we calculate this

The adult weight and height come from the sources below. The shape of the growth chart comes from our own calculation on the open data behind a published veterinary growth standard, described on the how we calculate page. The charts are estimates built from a breed range and a population curve, not measurements of this breed.

Sources

5 sources behind the figures on this page.

Official UKC Breed Standard: American Bully
United Kennel Club - dated 2013-07-15 - read 2026-10-08
ukcdogs.com
American Bully Progression: Growth Chart and Milestones
A-Z Animals - dated 2026-09-23 - read 2026-10-08
a-z-animals.com
Growth standard charts for monitoring bodyweight in dogs of different sizes
Salt C, Morris PJ, German AJ, Wilson D, Lund EM, Cole TJ, Butterwick RF. PLoS ONE 12(9):e0182064 - dated 2017-09-06 - read 2026-10-08
Open access. Sets the adult-size categories and the growth standard method.
pmc.ncbi.nlm.nih.gov
Growth standard charts for monitoring bodyweight in dogs of different sizes - supporting data
University of Liverpool Data Catalogue - dated 2017-07-28 - read 2026-10-08
14,957,947 weight records from Banfield Pet Hospitals, 1994-2013, released under CC BY 4.0. Our growth curves are calculated from this file.
datacat.liverpool.ac.uk
When Does My Puppy Finish Growing?
American Kennel Club - read 2026-10-08
akc.org

Nearby

Keep going

Last reviewed October 10, 2026. Estimate only. For health questions, ask your vet.

American Bully full grown

American Bully weight calculator

Key takeaways