Cat Chocolate Toxicity Calculator
Cats rarely eat chocolate on purpose, but if yours did, enter their weight, the type and the amount for an instant risk read and what to do now.
Most candy bars and milk-chocolate chips.
Enter your cat's weight and how much they ate to see the risk.
- ASPCA Animal Poison Control: (888) 426-4435 · US (fee may apply)
- Pet Poison Helpline: (855) 764-7661 · US/Canada (fee may apply)
This is an estimate, not a diagnosis. Cats are very sensitive and rarely eat chocolate on purpose — if yours did, err toward calling.
Estimate only — not veterinary advice. Every animal is different; for a medication dose, a possible poisoning, or any emergency, call your veterinarian or an animal poison control line right away.
Cats need their own calculator
Most online chocolate checkers are built only for dogs. Cats weigh far less and are at least as sensitive to theobromine, so a dose that is mild for a Labrador can be serious for a house cat.
How we adjust, and why we say so: the published theobromine thresholds most often quoted (roughly 20 mg/kg for stomach upset, 40 for cardiac signs, 60 for seizures) come from dog data. There is no equally established cat-specific set of bands. Rather than reuse the dog numbers unchanged, we deliberately lower the thresholds by 15% for cats, so a given dose lands one notch more cautious. That 15% is our editorial choice in the direction of safety, not a published veterinary constant — which is exactly why any real ingestion by a cat should be a phone call, not a calculator result.
What to do now
- Note the chocolate type, the amount, and the time eaten.
- Run the calculator. If the result is moderate or higher, call.
- Call your vet or an animal poison control line with your cat's weight and the details ready.
- Keep watching for at least 12–24 hours — theobromine clears slowly.
This is an estimate to help you decide whether to call, not a diagnosis. When in doubt, especially with a small or unwell cat, treat it as serious and pick up the phone.
Frequently asked questions
- Is chocolate toxic to cats?
- Yes. The same theobromine that poisons dogs poisons cats, and because cats are small a little goes a long way. Cats are also picky eaters and usually avoid chocolate, so any real ingestion is worth taking seriously.
- How much chocolate is dangerous for a cat?
- Theobromine becomes a concern around 20 mg per kg of body weight and serious around 40+. A 4–5 kg cat reaches that with a surprisingly small amount of dark or baking chocolate. Enter the details above for your cat's specific dose.
- What are the symptoms in cats?
- Vomiting, diarrhea, increased thirst, restlessness or hyperactivity, a fast heart rate, and in severe cases tremors or seizures. Signs may take several hours to appear.
- What should I do if my cat ate chocolate?
- Run the numbers, then call your vet or an animal poison line (ASPCA 888-426-4435, Pet Poison Helpline 855-764-7661), especially for dark or baking chocolate or if your cat is small. Don't try to make a cat vomit at home unless a professional tells you to.
Sources
These are the references behind this calculator. Where a source gives a range we take the midpoint and round toward caution, and where we go beyond what a source states — an extra safety margin, or a rule of thumb rather than a clinical threshold — the page says so in the text above.
- Chocolate — Pet Poison Helpline
- Chocolate poisoning in dogs — VCA Animal Hospitals
- Animal Poison Control Center — ASPCA