Tosa weight by age
Typical weight by age for a Tosa with an adult weight of about 150 lb (male) or 150 lb (female). The range shows where most puppies fall.
| Age | Male | Female |
|---|---|---|
| 2 months | 24 lbrange 16–31 lb | 24 lbrange 16–31 lb |
| 3 months | 40 lbrange 29–52 lb | 40 lbrange 29–52 lb |
| 4 months | 59 lbrange 45–73 lb | 59 lbrange 45–73 lb |
| 5 months | 80 lbrange 64–97 lb | 80 lbrange 64–97 lb |
| 6 months | 95 lbrange 77–112 lb | 95 lbrange 77–112 lb |
| 8 months | 119 lbrange 99–136 lb | 119 lbrange 99–136 lb |
| 10 months | 130 lbrange 109–146 lb | 130 lbrange 109–146 lb |
| 12 months | 136 lbrange 118–150 lb | 136 lbrange 118–150 lb |
Divide pounds by 2.2 for kilograms.
Adult weight
AKC breed page: 100-200 pounds. The calculator uses about 150 lb for males and 150 lb for females as the typical adult weight.
Common questions
How much should a Tosa puppy weigh at 3 months?
A typical male Tosa weighs about 40 lb at 3 months (most between 29 and 52 lb). A typical female weighs about 40 lb (most between 29 and 52 lb).
How much should a Tosa puppy weigh at 6 months?
A typical male Tosa weighs about 95 lb at 6 months (most between 77 and 112 lb). A typical female weighs about 95 lb (most between 77 and 112 lb).
How much does a Tosa weigh at 1 year?
A typical male Tosa weighs about 136 lb at 12 months (most between 118 and 150 lb). A typical female weighs about 136 lb (most between 118 and 150 lb).
When does a Tosa stop gaining weight?
The typical Tosa puppy reaches about 90% of its adult weight around 12 months and 95% around 18 months. Large and giant breeds fill out for longer than small ones.
How accurate is the Tosa weight calculator?
Across our test dogs the typical miss was about 11% of adult weight, smaller for older puppies. Your puppy can land outside the range. See the methods page.
Other breeds
Weight standard: AKC breed page. Growth curves: our analysis of open data from Salt et al. (2017), CC BY 4.0. An estimate, not veterinary advice. Methods.