Data-driven estimates
Based on growth patterns from thousands of healthy dogs.
Puppy Weight Calculator
Estimate how big your puppy may get as an adult.
Enter your puppy's details to see the estimate
How it works
Enter your puppy's age, weight, and breed to get an estimated adult weight range backed by typical growth curves—not guesswork.
US-focused
Tailored for US breeds and measurement standards.
Always free
No sign-up, no limits. Just helpful tools.
Frequently asked questions
How accurate is the puppy weight calculator?
Our calculator provides estimated weight ranges based on breed data and growth curves. Individual puppies may vary based on genetics, nutrition, and health. Use the result as a helpful guide, not a guarantee.
At what age is a puppy fully grown?
Toy breeds (under 12 lb) typically finish growing around 9–10 months. Small to medium breeds reach adult weight by 12–15 months. Large and giant breeds may continue growing until 18–24 months.
How does the calculator work for mixed breed puppies?
For mixed breeds, you can enter parent weights for a better estimate or select an expected adult size category. The calculator uses size-based growth curves when breed-specific data isn't available.
Why does the calculator show a weight range instead of an exact number?
No prediction can be exact. Showing a range is more honest and accounts for natural variation in genetics, diet, exercise, and individual growth patterns.
Should I be concerned if my puppy is outside the estimated range?
Slight variations are normal. If your puppy is significantly above or below the range, or if their growth rate changes suddenly, consult your veterinarian. This calculator is not a substitute for professional advice.