Estimate how big your puppy will grow. Enter your details below and get an instant, easy-to-read result.
Puppy Adult Weight Predictor
Estimate how big your puppy will grow.
Puppy Adult Weight Predictor
How this calculator works
Puppies grow at predictable curves that depend on their adult size group. Toy breeds finish growing early, while giant breeds keep growing for up to two years. Using your puppy's current weight, age and expected size group, this calculator projects a likely adult weight range — useful for choosing the right crate, harness and food plan.
Frequently Asked Questions
How accurate is a puppy weight prediction?
It is an estimate, not a guarantee. Mixed-breed puppies and growth spurts add variation, but size-group growth curves give a useful planning range.
At what age is a dog fully grown?
Toy and small breeds finish around 9 to 12 months, medium breeds around 12 to 16 months, and large to giant breeds can keep filling out until 18 to 24 months.
Does predicted weight change the food I buy?
Yes — large and giant breed puppies should eat large-breed puppy formulas that control calcium and calories to protect growing joints.