About
About PuppyCalc
Free, fast calculators for the questions every dog and puppy owner asks — age, pregnancy, weight and vaccines — built to be usable in seconds and accurate enough to trust.
What We Do
PuppyCalc is a small collection of free web-based tools for dog owners: a dog age (human-years) calculator, a pregnancy due-date calculator, a puppy weight estimator, a dog weight checker, a puppy development tracker, and reference guides on vaccines, breed sizes and lifespan. Every calculator runs entirely in your browser — enter a value, get an instant answer, no sign-up required.
How We Keep the Numbers Honest
Pet calculator sites are full of copy-pasted formulas with no source behind them. We try to do better: every conversion factor and reference range on this site — dog-to-human age conversion, gestation length, puppy growth checkpoints, vaccine timing, breed lifespan — has been checked against publicly available guidance from the American Kennel Club (AKC), the American Veterinary Medical Association (AVMA), VCA Animal Hospitals, and the American Animal Hospital Association's (AAHA) vaccination guidelines. Where sources disagree slightly, or where a figure is a widely used estimate rather than an exact measurement, we say so on the page.
That said, no online calculator replaces an actual veterinarian who has examined your dog. Treat every result on this site as a helpful estimate, not a diagnosis or medical advice — see our Terms of Use for the full disclaimer.
How the Site Makes Money
PuppyCalc is free to use and supported by advertising. We don't require accounts, and we don't sell or share the values you type into a calculator — see our Privacy Policy for details on data and cookies.
Questions or Corrections?
If you spot an error, have a source that contradicts a figure on this site, or just want to suggest a new tool, get in touch via our Contact page — we read every message.