Puppy Weight Calculator β Adult Size Estimate
Quick answer: Enter puppy's current weight and age to estimate adult weight and weeks to maturity.
Estimate how big your puppy will grow based on current weight, current age, and breed size. Uses growth milestone percentages to project adult weight.
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Last reviewed: April 2026Report an error
Estimated Adult Weight
37.0 lbs
Estimated adult weight: 37.0 lbs. Currently 27.0% of adult weight.
Estimated Adult Weight (lbs)
37.0
% of Adult Weight
27.0%
Weeks to Adult
40
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How to Use This Puppy Weight Calculator
- 1Enter your puppy's current weight in pounds.
- 2Enter your puppy's current age in weeks.
- 3Select breed size: small, medium, large, or giant.
- 4Read estimated adult weight and weeks until fully grown.
Frequently Asked Questions
- Small breeds (under 20 lbs): 9β12 months. Medium breeds: 12 months. Large breeds: 15β18 months. Giant breeds (over 100 lbs): 18β24 months. Larger dogs take much longer to mature.
- These are estimates based on average growth curves. Mixed breeds and dogs with health issues may deviate significantly. The best predictor is parent size.
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