About puppyweightcalculator.co

puppyweightcalculator.co is a free, independent set of tools that help dog owners answer a simple question: how big will my puppy get? Everything is free to use, with no sign-up, no login and no limits.

Our methodology

Our puppy weight calculator uses the percentage-of-adult-weight method: it estimates adult weight by dividing your puppy's current weight by the fraction of adult weight a dog of that size class has typically reached at its current age. The growth curves are modelled on published canine growth research and standard breed size classes, and every tool shows its own "Sources & methodology" section.

Sources we rely on

• Salt C, et al. (2017). "Growth standard charts for monitoring bodyweight in dogs of different sizes." PLOS ONE 12(9): e0182064.
• WALTHAM Petcare Science Institute: puppy growth charts and size-class references.
• Breed size standards from recognised kennel clubs, including the American Kennel Club (AKC).
• WSAVA Global Nutrition Committee: body condition score guidelines.

Our commitment

• Free and open: no account, no paywall.
• Private: the calculators run in your browser; we don't store your puppy's details.
• Honest: every result is clearly labelled an estimate with a stated margin, and is not a substitute for veterinary advice.

Editorial standards

Our content is grounded in the cited, published research above rather than opinion. We are adding a named, credentialed veterinary reviewer to further strengthen our editorial process; until then, our methodology and sources are published transparently on every tool so you can check the basis of each estimate yourself.

Contact

Feedback or corrections are welcome at hello@puppyweightcalculator.co.