MicroCalculatorsPuppy Growth Calculator
Estimate adult weight from current puppy weight and age. Uses growth curves by breed size: small (<25 lb), medium (25–50 lb), large (>50 lb).
Puppy's current weight in pounds.
Puppy's age in weeks (e.g. 12 for 3 months).
Based on breed or parent size.
Result:
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Estimating Puppy Adult Weight
Growth curves differ by breed size: small (<25 lb), medium (25–50 lb), and large (>50 lb). This calculator uses current weight and age in weeks with size-specific curves to estimate adult weight.
Mixed breeds are harder to predict — use the size category of the largest parent. Genetics drive size; nutrition affects health, not final frame. Consult your vet for feeding and growth guidance.
People Also Ask
- How big will my puppy get?
- Can I predict my mixed breed dog's adult weight?
- At what age do puppies stop growing?
Puppy Growth Calculator — FAQ
- Are growth estimates accurate for mixed breeds?
- Mixed breeds are harder to predict. Use the size category of the largest parent as a guide.
- Does nutrition affect final size?
- Genetics largely determine size. Poor nutrition can stunt growth; overfeeding can cause obesity, not larger frame.
- Do male and female dogs grow differently?
- Males are often 5–15% heavier. Use breed averages as a guide.
Want to learn more?
Read our full guide: Puppy Growth Stages: How Big Will My Puppy Get? — growth timelines by breed size, the prediction method, and what affects final weight.
Last updated: February 2026