Dog Chocolate Toxicity Calculator
Instant theobromine-dose estimate — enter your dog's weight and what they ate.
Not veterinary advice. This tool gives a general estimate for informational purposes only — it does not replace professional judgment. If you're concerned, contact a veterinarian right away. Call a poison control hotline now if you're worried, even before you finish this calculator: ASPCA Animal Poison Control Center (888) 426-4435 or Pet Poison Helpline (800) 213-6680 (both 24/7/365; a consultation fee may apply).
Sources & how this is calculated
Theobromine content per chocolate type and the mg/kg clinical thresholds above come from the Merck Veterinary Manual, "Chocolate Toxicosis in Animals" . Where Merck publishes a range (semisweet/dark chocolate: 150–160 mg/oz), this calculator uses the higher, more conservative figure. The ASPCA Animal Poison Control Center toxicology brief publishes slightly lower figures for milk chocolate (44 mg/oz) and baker's chocolate (390 mg/oz) — we default to Merck's higher numbers throughout so this tool errs on the side of warning sooner, not later.
This tool estimates theobromine dose only. It cannot account for a dog's individual health conditions, other ingredients (like xylitol in some chocolate products), or how much time has passed since ingestion. It is not a substitute for veterinary care.