Educational reference only — not a diagnosis. If your dog has eaten chocolate, call your veterinarian or an animal poison control hotline right away, especially if the amount or type is uncertain. Do not wait for symptoms to appear before calling.
Enter the dog's weight and how much chocolate was eaten to estimate exposure.
Commonly cited convention (~44–70 mg/oz depending on brand/cacao %); this tool uses a mid/upper-range figure of ~2.4 mg/g.
How This Calculator Works
Theobromine — the compound in chocolate responsible for toxicity in dogs — varies widely in concentration by chocolate type. This tool uses commonly cited mg-per-gram conventions for five common household chocolate types, then computes:
Exposure (mg/kg) = (theobromine mg/g × grams eaten) ÷ body weight (kg)
That exposure figure is then compared against commonly described concern bands — mild GI signs, cardiac signs, and seizure risk — for reference only.
Worked Example
A 10 kg dog eats 100 g of milk chocolate:
100 g × ~2.4 mg/g ≈ 240 mg theobromine ÷ 10 kg ≈ 24 mg/kg
24 mg/kg falls in the commonly described mild-GI-signs band (~20 mg/kg and up) — this is still a call-your-vet situation, particularly because actual theobromine content varies by brand and cacao percentage.
If your dog has eaten chocolate, call your veterinarian or an animal poison control hotline right away — especially if the amount or type of chocolate is uncertain. This tool is an educational estimate only and does not replace a professional assessment.
Frequently Asked Questions
My dog just ate chocolate — should I use this calculator instead of calling the vet?
No — call your veterinarian or an animal poison control hotline right away, especially if the amount or type of chocolate is uncertain. This calculator is an educational estimate to help frame the conversation, not a substitute for a professional assessment, and it cannot account for factors like the exact cacao percentage of the specific product eaten.
Why does chocolate type matter so much?
Theobromine — the compound responsible for chocolate toxicity in dogs — is far more concentrated in darker, less-sweet chocolate. Dry cocoa powder and baking chocolate contain many times more theobromine per gram than milk or white chocolate, so the same weight of different chocolate types can produce very different exposure levels.
How is the mg/kg exposure calculated?
Total theobromine (mg) = theobromine content per gram for the chocolate type × grams eaten. That total is then divided by the dog's body weight in kilograms to give mg/kg — the exposure figure compared against commonly described concern thresholds.
What do the "commonly described" thresholds mean?
They reflect ranges commonly cited in veterinary and poison-control reference material — roughly 20 mg/kg for mild GI signs, 40–50 mg/kg for cardiac signs, and 60 mg/kg for seizure risk. These are reference bands, not a diagnosis, and individual dogs can react differently based on size, health status, and sensitivity.
What if the estimated exposure is below the "mild GI" threshold?
A lower estimate still warrants caution — call your veterinarian if you have any concern, if the dog shows any signs, or if you are unsure about the amount or type eaten. Fat and sugar content alone can also cause GI upset or, in some cases, pancreatitis, separate from theobromine toxicity.
Does this tool account for other toxic foods, like xylitol or grapes?
No — this calculator is scoped specifically to chocolate/theobromine exposure. Xylitol, grapes/raisins, and other toxic foods work through entirely different mechanisms and are not covered here. If any toxic food ingestion is suspected, contact your veterinarian or an animal poison control hotline.
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