Pet care calculators that show you the formula
Every tool here shows its working. The formula is on the page, the source is cited, and the limitations are stated rather than buried — including when the honest answer is that a calculation cannot be done.
Puppy Growth & Feeding Calculator
Adult weight, daily calories, portion size and crate size.
Open the calculator →Dog Chocolate Toxicity Calculator
The methylxanthine dose from a chocolate exposure, against the published canine thresholds.
Open the calculator →Dog Breed Match Quiz
Seven questions, and the reasoning behind every suggestion.
Open the quiz →Cat Feeding & Calorie Calculator
How many calories your cat needs, using the feline factors — the dog table overfeeds by a third.
Open the calculator →Why we cite everything
Pet care advice online tends to be confident and unsourced, which is how people end up following a formula invented by whoever wrote the page. Every calculator here names its source, shows the working, and states its limitations — including when the answer is weak. The puppy weight formula assumes steady growth, so the tool labels which reliability band your input falls in instead of showing false precision.
We do not diagnose or recommend treatments. Those need your pet’s body condition, history and a hands-on exam. Where something is urgent — a suspected poisoning, say — the tool tells you to contact a veterinarian rather than reassuring you on its own authority.