Straight answers about your dog,
backed by real data.

Free tools built on veterinary research and measured population data, with the sources shown and the limitations stated, so you can see how much to trust the number.

Puppy size calculator Dog calorie calculator

Why these tools are different

Most pet calculators apply one rule of thumb to every dog and never say where it came from. Ours are calibrated against published data, cover 268 breeds including designer crosses, show a confidence level with every answer, and tell you plainly when the estimate should not be trusted. See the methodology.

Breed size guides

All breed guides →

In-depth guides to how individual breeds grow, what they are like to live with, and what the health evidence actually shows, each one sourced at the point of the claim.

Straight answers about how dogs grow, with the veterinary sources cited and the uncertainty stated rather than smoothed over.

Also in progress, in the order their research is ready: a daily calorie calculator, a searchable food-safety lookup, a chocolate toxicity calculator. Each ships when the evidence behind it is solid enough to publish, not before.