If your dog ate chocolate, act now
Call your veterinarian or an animal poison control line right away, even if your dog seems completely fine. Do not wait for symptoms. This calculator is guidance to help you describe what happened, not a diagnosis.
Free tool by Omelo
My dog ate chocolate.
How bad is it?
Quick answer
A dog that eats chocolate needs a vet, not a wait-and-see. Toxic signs in dogs generally begin around 20 mg/kg of theobromine (mild: vomiting and restlessness), cardiac effects around 40 mg/kg, and seizures or life-threatening signs above 60 mg/kg. Theobromine is highest in cocoa powder and baking chocolate, lower in dark and milk chocolate, and lowest in white chocolate. Because the risk depends on your dog's weight, the chocolate type, and the amount eaten, call your veterinarian or an animal poison control line right away, even for a small amount.
Your dog's weight
Type of chocolate
Not sure of the cacao percentage? Pick the stronger (darker) option. It is safer to overestimate the dose.
How much was eaten
How the chocolate toxicity calculator works
Chocolate is toxic to dogs because of theobromine, a stimulant that dogs clear from their bodies very slowly. This calculator estimates the theobromine dose your dog received using a simple formula: the grams of chocolate eaten multiplied by the theobromine content of that chocolate type, divided by your dog's body weight in kilograms. The result is a dose in milligrams per kilogram (mg/kg), which is how veterinarians assess the risk.
Typical theobromine values used here are about 0.1 mg/g for white chocolate, 2.4 mg/g for milk chocolate, 5.5 mg/g for semi-sweet and standard dark chocolate, 15 mg/g for high-cacao (70%+) and bittersweet chocolate, 16 mg/g for unsweetened baking chocolate, and 26 mg/g for cocoa powder. The exact number depends on the cacao percentage, so if you are unsure, choose the darker option to avoid underestimating the dose.
How much chocolate is toxic to a dog?
There is no single safe amount, because it depends on your dog's weight and the type of chocolate. As a guide, mild signs in dogs generally begin around 20 mg/kg of theobromine, heart effects around 40 mg/kg, and seizures or life-threatening signs above 60 mg/kg. A small dog eating dark chocolate or cocoa powder can reach dangerous doses from a surprisingly small amount, while the same weight of milk chocolate carries less theobromine. This is why you should always call your vet rather than guess.
Symptoms of chocolate poisoning in dogs
Signs usually appear within 6 to 12 hours and can last up to 72 hours. Early signs include vomiting, diarrhea, restlessness, and increased thirst and urination. As the dose rises, dogs can develop a racing or irregular heartbeat, high blood pressure, muscle tremors, and in severe cases seizures. Because theobromine leaves the body slowly, a dog can look normal at first and then get worse over the next day. Do not wait to see if symptoms appear before calling your vet.
Is white chocolate safe for dogs?
White chocolate has almost no theobromine, so theobromine poisoning is unlikely from it alone. It is still not safe. White chocolate is very high in fat and sugar, which can cause vomiting, diarrhea, and pancreatitis, a painful and sometimes serious inflammation of the pancreas. If your dog eats white chocolate, especially a large amount, call your vet.
Why tracking matters after chocolate exposure
After you have spoken to your vet, the next 24 to 72 hours matter. Noting exactly what your dog ate, when, and how their symptoms change gives your vet a clear picture if the situation develops. Omelo helps you log the incident, track symptoms over time, and keep a health history you can share. Omelo is free to try, then Omelo Plus adds unlimited chat, full history, and trends. The app is for follow-up and record-keeping. It does not replace calling your vet or poison control now.
Frequently asked questions
My dog just ate chocolate. What should I do right now?
Call your veterinarian or an animal poison control line immediately, even if your dog seems fine. Do not wait for symptoms to appear. Have ready your dog's weight, the type of chocolate, roughly how much was eaten, and when it happened. Do not try to make your dog vomit unless a vet tells you to.
How much chocolate is toxic to dogs?
It depends on the theobromine dose, which comes from your dog's weight, the type of chocolate, and the amount eaten. In dogs, mild signs generally start around 20 mg/kg of theobromine, cardiac effects around 40 mg/kg, and seizures or life-threatening signs above 60 mg/kg. Darker and more concentrated chocolate reaches these doses in much smaller amounts.
Which chocolate is most dangerous for dogs?
Cocoa powder and unsweetened baking chocolate have the most theobromine per gram, followed by dark and bittersweet chocolate, then milk chocolate. White chocolate has almost no theobromine, but its high fat can still cause vomiting and pancreatitis, so it is never truly safe.
How long after eating chocolate do dogs show symptoms?
Signs usually begin within 6 to 12 hours and can last up to 72 hours, because theobromine clears slowly from a dog's body. This is why you should call your vet right away rather than waiting to see if symptoms appear.
Is white chocolate dangerous for dogs?
White chocolate contains very little theobromine, so theobromine poisoning is unlikely from it alone. The real risk is its high fat and sugar, which can cause vomiting, diarrhea, and pancreatitis. Call your vet if your dog eats white chocolate, especially a large amount.
Sources
Theobromine values and toxicity thresholds are drawn from the Merck Veterinary Manual (MSD), “Chocolate Toxicosis in Animals”; VCA Animal Hospitals, “Chocolate Poisoning in Dogs”; and the ASPCA Animal Poison Control Center. Thresholds are commonly quoted against total methylxanthines (theobromine plus caffeine); this tool models theobromine only, so it estimates conservatively low.