Dog calculators that do the arithmetic properly
Five things owners actually need to work out, done with the formulas vets use rather than the rules of thumb that get repeated online. Free, instant, and nothing is stored.
- Instant, no signup
- Nothing you enter is stored
- 🧮 Shows the formula, not just the answer
Why these five
They are the questions that come up over and over, and the ones where the commonly repeated answer is wrong often enough to matter. One dog year is not seven human years. The feeding guide on the bag is written for a dog that does not exist. And "how much chocolate is too much" has a real answer that depends on three numbers most people have to hand.
Each tool shows its working. Where the honest answer is "there is no reliable number" — which is the case for grapes — it says that instead of inventing one.
Start from your dog's breed
Several of these want a size or an expected adult weight. Every breed profile lists the weight range, lifespan and trait scores for that breed, and if you are not sure what you have, the photo identifier will tell you what your dog most resembles.
Still choosing a dog rather than measuring one?
The Breed Match quiz reads your home, your week and your household against every breed we have profiled, and tells you which ones actually fit.