Dog chocolate toxicity calculator

Work out if the chocolate your dog ate is dangerous. Based on current US veterinary data (ASPCA, Merck Veterinary Manual). Takes 30 seconds.

This tool is a guide, not a replacement for a vet

If your dog has eaten chocolate, call your vet regardless of what this calculator says. Individual dogs vary, theobromine levels vary between brands, and only a vet can decide on treatment. ASPCA Animal Poison Control Center: (888) 426-4435 (24/7, fees apply). Or Pet Poison Helpline: (855) 764-7661 (fees apply).

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Enter the details

Your dog's weight

What did your dog actually eat?

Select a specific product for the most accurate estimate. Can't find it? Pick "Other / not listed" to choose a chocolate type instead.

Type of chocolate

How many of these did your dog eat?

Enter the number of units (whole or fraction). Example: 2 = two bars, 0.5 = half a bar.

Amount eaten

Not sure? A standard Hershey's bar is 43g (1.55 oz). A Kit Kat finger is 10g (0.35 oz). A Hershey's Kiss is 4.5g (0.16 oz). A fun-size candy bar is about 15g (0.5 oz).

How to use this

Three pieces of information matter: how heavy your dog is, what type of chocolate they ate, and roughly how much. The calculator uses veterinary-grade theobromine concentrations and compares the dose to the thresholds published by the ASPCA Animal Poison Control Center and the Merck Veterinary Manual.

Guide to chocolate types

White chocolate — has almost no theobromine. Danger is fat and sugar, not toxicity.
Milk chocolate (Hershey's, KitKat, Milky Way, 3 Musketeers, most mainstream candy bars) — moderate theobromine.
Dark chocolate — theobromine rises sharply with cocoa percentage. Check the packaging.
Baking / cocoa powder — the most dangerous by weight. Small amounts can be severe.
Cocoa mulch — garden mulch made from cocoa husks. Smells attractive to dogs; very high theobromine.

What the risk levels mean

Below 20 mg/kg Usually no clinical signs — monitor at home, but call your vet if worried

20–40 mg/kg Mild signs: vomiting, diarrhea, excessive thirst. Call your vet.

40–60 mg/kg Cardiotoxic effects: rapid or irregular heart rate. Urgent vet needed.

60–100 mg/kg Seizures likely. Emergency vet immediately.

Over 100 mg/kg Potentially lethal. Emergency hospitalisation required.

A chocolate emergency can cost $500–$10,000+

Pet insurance covers chocolate poisoning treatment. Compare US providers in 60 seconds.

Learn about vet costs & insurance →

Sources

Theobromine concentrations sourced from the ASPCA Animal Poison Control Center, Merck Veterinary Manual, and Veterinary Partner (VIN). Toxicity thresholds based on current veterinary consensus (20 mg/kg mild, 40–50 mg/kg cardiotoxic, 60 mg/kg seizures).

Read our full chocolate and dogs guide →

Important: This calculator uses average theobromine concentrations — actual content varies by brand and batch. Individual dogs have different sensitivities. The calculator is an assessment aid only. If your dog has eaten chocolate, always contact a vet.