Puppy Growth Chart & Adult Weight Predictor
Predict your puppy's full adult weight and height based on current age in weeks and current weight.
Puppy Growth & Adult Weight Predictor
Target Range: 17.3 - 21.2 kg
How to Use the Puppy Growth Chart & Adult Weight Predictor
- Enter current puppy weight in lbs or kg.
- Enter current puppy age in weeks (e.g. 12 weeks).
- Select breed size class.
- Get predicted adult weight, weight trajectory chart, and month-by-month milestone targets.
Clinical Methodology & Formula Breakdown
Uses standard growth multipliers based on breed size curve. For medium/large dogs, weight at 16 weeks * 2 roughly equals adult weight; for small dogs, weight at 12 weeks * 2.
- WALTHAM Puppy Growth Charts (PLOS ONE)
- AVMA Growth Standards
Worked Clinical Example
Puppy Weight Trajectory (% of Adult Weight by Age)
| Age in Weeks | Toy/Small Breed | Medium Breed | Large Breed | Giant Breed |
|---|---|---|---|---|
| 8 Weeks | 25% | 18% | 12% | 8% |
| 12 Weeks | 50% | 35% | 28% | 20% |
| 16 Weeks | 65% | 52% | 42% | 32% |
| 24 Weeks (6 Mo) | 85% | 75% | 65% | 50% |
| 52 Weeks (1 Yr) | 100% | 98% | 90% | 75% |
| 78 Weeks (18 Mo) | 100% | 100% | 100% | 95% |
Frequently Asked Questions
How accurate are puppy weight predictors?
Most formulas are within 10% accuracy for purebred puppies. Mixed breeds with unknown ancestry may vary based on dominant genetic traits.
Does paw size accurately predict adult size?
Paw size provides a rough visual clue for large breeds with heavy bone structure, but weight-for-age formulas are scientifically far more accurate.
When do puppies stop growing in height vs weight?
Puppies reach adult height first (around 9-12 months for most breeds), then continue filling out muscle and chest width for another 3-12 months.
Why is overfeeding a growing puppy dangerous?
Overfeeding large breed puppies causes rapid bone growth before joints are ready, leading to hip dysplasia, OCD, and elbow deformities.
When should I switch from puppy food to adult food?
Small breeds: 10-12 months. Medium breeds: 12 months. Large/Giant breeds: 18-24 months.