Dog Chocolate Toxicity Calculator
Find out how dangerous chocolate is for your dog. Enter their weight, the type of chocolate, and how much they ate.
If you're worried at all — even if the calculator says it's safe — see a vet immediately.
Australian Animal Poisons Helpline: 1300 869 738
Chocolate and dogs — why it's dangerous
Chocolate contains theobromine, a compound in the same family as caffeine. Humans metabolise theobromine quickly, but dogs process it much more slowly — the half-life in dogs is about 17.5 hours compared to 6–10 hours in humans. This means theobromine builds up to toxic levels far more easily in dogs.
The severity depends on three factors: the type of chocolate, the amount eaten, and the size of the dog. Darker, more concentrated chocolates contain dramatically more theobromine:
- White chocolate: Contains almost no theobromine (0.25 mg/g). Unlikely to cause theobromine poisoning, but the fat and sugar content can still cause pancreatitis.
- Milk chocolate: About 2.3 mg/g of theobromine. A 10 kg dog would need to eat roughly 90 grams to reach moderate toxicity — that's about one standard chocolate bar.
- Dark chocolate (70%): About 8 mg/g. Just 25 grams could cause moderate symptoms in a 10 kg dog.
- Baking chocolate: About 16 mg/g. Extremely concentrated — small amounts are dangerous for dogs of any size.
- Cocoa powder: The most dangerous at 28.5 mg/g. A single tablespoon (~7 g) contains nearly 200 mg of theobromine.
Frequently Asked Questions
How much chocolate is toxic to dogs?
It depends on the type of chocolate and the size of your dog. Theobromine, the toxic compound, varies greatly by chocolate type. White chocolate has very little (0.25 mg/g), while cocoa powder has the most (28.5 mg/g). As a general rule, a dose above 20 mg of theobromine per kg of body weight can cause symptoms, and above 60 mg/kg is potentially lethal. A 10 kg dog eating just 25 grams of dark chocolate could show moderate symptoms.
What should I do if my dog eats chocolate?
Note the type and approximate amount of chocolate, then contact your vet or an emergency animal hospital immediately. Do not try to induce vomiting unless specifically instructed by a veterinarian. Time is critical — treatment within 2 hours of ingestion is most effective. In Australia, you can call the Animal Poisons Helpline on 1300 869 738 for advice.
Is white chocolate safe for dogs?
White chocolate contains very little theobromine (about 0.25 mg per gram), so theobromine poisoning is extremely unlikely. However, white chocolate is still high in fat and sugar, which can cause pancreatitis and digestive upset in dogs. It should still be kept away from pets.
How long does chocolate poisoning take to show symptoms?
Symptoms typically appear within 6 to 12 hours of ingestion, but can start as early as 2 hours. Early signs include vomiting, diarrhea, excessive thirst, and restlessness. More severe symptoms such as rapid heart rate, tremors, and seizures may develop later. Theobromine has a long half-life in dogs (about 17.5 hours), so symptoms can persist for 24–72 hours.