Chocolate Toxicity Calculator for Dogs
My dog ate chocolate - is it dangerous? Estimate the risk in seconds by weight, chocolate type and amount.
This calculator is for dogs only. It works from thresholds published for dogs, because dogs are the species the veterinary literature actually covers in detail.
A cat is not a smaller dog. The same two chemicals in chocolate, theobromine and caffeine, affect cats too, but the thresholds reported for cats are not the same numbers, and a cat’s much lower body weight changes the arithmetic before you even begin. Reading a dog result across to a cat will mislead you in one direction or the other, and there is no safe way to guess which.
If a cat has eaten chocolate, do not use this tool. Read Can Cats Eat Chocolate and ring your vet or your national animal poison line. The same applies to rabbits, ferrets and every other species: this page cannot speak for them.
Why chocolate is toxic to dogs
Chocolate contains theobromine, a stimulant dogs metabolise far more slowly than humans. The darker the chocolate, the more theobromine: cocoa powder and baking chocolate are 5-10Ă— more dangerous than milk chocolate, while white chocolate contains almost none. Doses above roughly 20 mg per kg of body weight cause symptoms; above 60 mg/kg can be life-threatening.
Symptoms usually appear within 6-12 hours: vomiting, diarrhoea, excessive thirst, restlessness, fast heart rate, tremors. This calculator is a triage aid, not a diagnosis - when in doubt, call your vet or an emergency clinic immediately. Keep the packaging so the vet knows the cocoa content. Read more in Can dogs eat chocolate?
This tool gives general estimates only and is not veterinary advice. Always consult your vet about your individual pet. Full disclaimer.
What this tool does and, more importantly, what it refuses to do
It takes a weight, a chocolate type and an amount, and reports where that lands against thresholds published in a veterinary reference, with the reference and the date it was read shown alongside the result.
What it will not do is tell you that your dog is fine. There is no all clear in this tool, no reassuring band, and no advice about what to do at home. That is a design decision, not an oversight. A calculator that issues an all clear is a calculator that talks somebody out of phoning, and the cost of being wrong in that direction is not symmetrical with the cost of being wrong in the other.
Why a threshold is not a safety line
Published thresholds come from case series and reference works, and they describe where effects have been observed across populations of animals. They are not a boundary your particular animal sits safely below, and they were never intended to be read that way by an owner with a phone in one hand.
Individual animals vary. Reported amounts are usually estimates. The product in your kitchen may not match the category it was assigned. Each of those alone would be enough reason not to treat a number as permission, and here you have all three at once.
What actually helps, right now
Phone your vet or your nearest emergency service. Have the packaging, the animal’s weight, roughly how much is missing, and roughly how long ago it happened. Those four facts are what you will be asked for, and gathering them takes less time than reading this page.
We publish no home remedies, nothing about making an animal sick, and no treatment of any kind. Those are veterinary procedures, some of them are actively dangerous when attempted at home, and none of them is ours to describe.
Where our figures come from
From veterinary reference works, quoted and dated on the page, not from consumer content libraries or from other calculators. Where a reference publishes a range rather than a single value, we take the more cautious end and say that we have.
Where nothing is published, the tool refuses to calculate rather than deriving something plausible. Several substances elsewhere on this site sit in exactly that state, named on the page as unverified, with the reason printed. We would rather show you a refusal than a manufactured number.
