Puppy Weight Predictor
Predict how big your puppy will grow based on current weight, age, and expected adult size. Track growth progress with our easy-to-use tool.
About This Calculator
Puppy growth follows predictable patterns based on their expected adult size. Small breed dogs reach their adult weight faster (around 9-12 months), while giant breeds continue growing until 18-24 months. Our calculator uses size-specific growth formulas to estimate your puppy's adult weight.
The prediction is based on the ratio of current age to the typical maturity age for the size category. While genetics, nutrition, and health all play a role, this calculator gives you a reliable ballpark figure. The ±10% range accounts for natural variation in growth rates.
📖 Read our guide: How Big Will My Puppy Get? Growth Curves Explained — size-class growth curves, the prediction math, and how often to weigh your puppy.
Frequently Asked Questions
How accurate is the puppy weight prediction?
Predictions are generally within ±10% of actual adult weight for most puppies. Mixed breeds and individual variation can affect accuracy. The prediction is most accurate for puppies between 8 weeks and 6 months old.
When do puppies stop growing?
Small breeds reach adult weight by 9-12 months. Medium breeds by 12-15 months. Large breeds by 15-18 months. Giant breeds can continue growing until 18-24 months of age.
What size category is my dog?
Small: under 10kg (22 lbs) as adult. Medium: 10-25kg (22-55 lbs). Large: 25-45kg (55-100 lbs). Giant: over 45kg (100 lbs). If unsure about your puppy's expected size, check the breed standard or ask your vet.