Pitbull Growth Chart: Puppy Weight by Month

Pitbull puppy weight chart (lb)

Adult weight	2 mo	3 mo	4 mo	5 mo	6 mo	8 mo	10 mo	12 mo
Male, 35 lb	6.7	12	16	21	24	29	32	34
Male, 60 lb	12	20	28	36	42	50	55	58
Female, 30 lb	5.8	10	14	18	21	25	28	29
Female, 50 lb	9.6	17	24	30	35	42	46	48

Pitbull puppy weight chart (kg)

Adult weight	2 mo	3 mo	4 mo	5 mo	6 mo	8 mo	10 mo	12 mo
Male, 16 kg	3.0	5.3	7.5	9.4	11	13	15	15
Male, 27 kg	5.2	9.0	13	16	19	23	25	26
Female, 14 kg	2.6	4.5	6.4	8.1	9.5	11	13	13
Female, 23 kg	4.3	7.5	11	13	16	19	21	22

Typical weights by month. Individual puppies often sit 10–15% above or below these numbers. Last reviewed October 7, 2026.

The American Kennel Club does not register the American Pit Bull Terrier, so this chart uses the UKC standard. The UKC calls these “desirable” weights and says overall balance matters more than the exact number.

For comparison, the AKC lists the closely related American Staffordshire Terrier at 55–70 lb for males and 40–55 lb for females.

How big does a Pitbull get?

According to the United Kennel Club breed standard for the American Pit Bull Terrier, adults weigh: male 35–60 lb; female 30–50 lb.

	Weight	Height
Male	35–60 lb	18–21 in
Female	30–50 lb	17–20 in

When does a Pitbull stop growing?

Pitbulls grow like other medium-sized dogs: they are close to adult weight at around 13 months. At 6 months a typical Pitbull puppy has reached about 70% of its adult weight.

To estimate your own puppy's adult weight from its current weight and age, use the puppy weight calculator and choose "Medium" as the expected adult size.

How the chart is made

The adult weights come from the UKC breed standard for the American Pit Bull Terrier. The weight at each month is estimated with our medium-breed growth curve, which gives the share of adult weight a typical puppy of that size reaches at each age. The curves are simplified from published research on dog growth, including the growth standard charts by Salt and colleagues (PLOS ONE, 2017).

If your puppy is well below or above the chart, stops gaining weight, or looks very thin or round, ask your vet to check its body condition.

Questions people ask

How much should a 3-month-old Pitbull weigh?

Typically about 10–20 lb, depending on sex and how big the dog will be as an adult.

How much should a 6-month-old Pitbull weigh?

Typically about 21–42 lb, roughly 70% of adult weight.

When is a Pitbull full grown?

Most Pitbulls are close to their adult weight at around 13 months, though many keep filling out with muscle for a while after that.

How big will my Pitbull get?

The United Kennel Club (UKC) standard for the American Pit Bull Terrier lists adult weights of male 35–60 lb; female 30–50 lb. Your puppy's parents are a good guide to where in that range it will end up.

Pitbull growth chart