Estimates a puppy’s adult weight by dividing current weight by the percentage of adult maturity at the current age. Small breeds mature by ~52 weeks, large breeds by ~60, and giant breeds by ~80 weeks. Shows predicted adult weight with ±15% range, percentage of adult weight currently achieved, and growth timeline by breed size category.
Estimate your puppy’s adult weight based on current weight, age, and breed size.
The puppy weight predictor estimates your puppy’s adult weight based on current weight, age in weeks, and breed size category. Small breeds reach adult weight by ~52 weeks; giant breeds take up to 80 weeks.
| Size | Adult Weight | Full Size By |
|---|---|---|
| Toy | Under 10 lbs | 9–12 months |
| Small | 10–20 lbs | 10–12 months |
| Medium | 20–50 lbs | 12–14 months |
| Large | 50–80 lbs | 14–18 months |
| Giant | 80+ lbs | 18–24 months |
Within ±15% for purebreds, less accurate for mixed breeds. The prediction improves as the puppy gets older — a prediction at 16 weeks is more reliable than at 8 weeks.
12–16 weeks gives a reasonable estimate. By 6 months (26 weeks), most dogs have reached 60–75% of adult weight, making predictions more accurate.
Males are typically 10–20% heavier than females of the same breed. If you know the sex, expect males toward the upper range and females toward the lower range of the prediction.
Yes, but accuracy is lower. Choose the size category that best matches the expected adult size based on the parents. If parents are unknown, the vet can estimate based on paw size and bone structure.
Small breeds finish by 10–12 months. Medium breeds by 12–14 months. Large breeds by 14–18 months. Giant breeds may continue growing until 18–24 months.
Yes, completely free. Enter current weight, age, and breed size for an instant adult weight estimate.