PetCalc was founded with a simple goal: to replace outdated "multiplication rules" with real biological growth data.
Most puppy weight calculators use a simple formula: (Current Weight / Age) * 52. The problem? Dogs don't grow linearly. A Great Dane grows at a completely different rate than a Toy Poodle. Using linear math for biological growth leads to inaccurate predictions and, more importantly, can lead to overfeeding and joint issues.
We wanted to give pet owners a tool that understands the Power-Law of canine development.
Our engine uses different biological curves for toy, medium, large, and giant breeds, adjusting the exponent of growth based on expected skeletal maturity.
We've compiled data on over 100 AKC recognized breeds to provide benchmarks that respect breed-specific standards and gender differences.
PetCalc isn't just about satisfying curiosity. By tracking your puppy's growth against our curves, you can identify potential developmental issues or nutritional imbalances early, ensuring a longer, healthier life for your companion.
Try the Calculator