Cat Chocolate Toxicity Calculator
Calculate the toxicity risk if your cat ate chocolate.
Estimates theobromine exposure based on chocolate type, amount, and your cat's weight.
Why Chocolate Is Toxic to Cats Chocolate contains theobromine and caffeine, both methylxanthines that cats metabolize much more slowly than humans. Cats are actually more sensitive to theobromine than dogs. The toxic dose for cats is approximately 200 mg/kg of theobromine, with lethal doses at around 80-150 mg/kg (lower than dogs due to cats’ smaller size and different metabolism).
Theobromine Content by Chocolate Type Cocoa powder: 800 mg/oz (the most dangerous). Baking/unsweetened chocolate: 450 mg/oz. Dark chocolate (70%+): 228 mg/oz. Dark chocolate (50-69%): 150 mg/oz. Milk chocolate: 58 mg/oz. White chocolate: 0.25 mg/oz (virtually no theobromine).
Why Cat Chocolate Poisoning Is Rarer Cats lack the taste receptor for sweetness (they literally cannot taste sugar), so they are far less likely than dogs to eat chocolate voluntarily. However, some cats are attracted to the milk fat in chocolate, and kittens may eat it out of curiosity. Chocolate-flavored medications or treats also pose a risk.
Symptoms Mild: restlessness, vomiting, diarrhea (at 20+ mg/kg). Moderate: rapid heartbeat, muscle tremors, excessive thirst (at 40+ mg/kg). Severe: seizures, cardiac arrhythmia, collapse (at 60+ mg/kg). Fatal: respiratory failure (at 80-150 mg/kg, depending on the cat).
IMPORTANT: Cats are MORE sensitive than dogs. Even small amounts of dark chocolate or cocoa can be dangerous. Contact your veterinarian immediately if your cat has eaten any chocolate.