Dog Chocolate Toxicity Calculator
Find out if the amount of chocolate your dog ate is dangerous. Enter your dog's weight, the type of chocolate, and the amount consumed.
Theobromine: 2.4 mg/g
A standard chocolate bar is about 43g (1.5 oz). A baking square is about 28g (1 oz).
Theobromine by Chocolate Type
Theobromine Toxicity Levels
Safe: under 20 mg/kg
No symptoms expected. Monitor your dog.
Mild: 20–40 mg/kg
Vomiting, diarrhea, restlessness.
Moderate: 40–60 mg/kg
Rapid heart rate, tremors. Call your vet.
Severe: over 60 mg/kg
Seizures, cardiac failure. Emergency vet visit.
Frequently Asked Questions
How much chocolate is toxic to dogs?
It depends on the type of chocolate and your dog's weight. Dark chocolate and cocoa powder are the most dangerous. As little as 1 ounce of dark chocolate per 10 lbs of body weight can cause moderate toxicity. Milk chocolate requires about 3.5 ounces per 10 lbs for mild symptoms.
What should I do if my dog ate chocolate?
First, determine the type and amount of chocolate eaten. Use this calculator to estimate the danger level. For moderate or severe toxicity, contact your local veterinarian or nearest emergency animal clinic immediately. Do not induce vomiting unless directed by a veterinarian.
Why is chocolate toxic to dogs?
Chocolate contains theobromine and caffeine, which are methylxanthines. Dogs metabolize theobromine much more slowly than humans — it can take 17+ hours for a dog to process half the theobromine consumed. This slow metabolism allows toxic levels to build up.
How long after eating chocolate will a dog show symptoms?
Symptoms typically appear within 6 to 12 hours of ingestion. They can last up to 72 hours. Early signs include vomiting, diarrhea, and restlessness. More severe symptoms like tremors and seizures may appear later.