CalHub

Cat Chocolate Toxicity Calculator

Screen the risk if a cat eats chocolate. Not a substitute for a vet.

Theobromine dose (mg/kg) 28.444
Risk level Mild signs possible

Formula: dose = amount(oz) × theobromine(mg/oz) ÷ weight(kg)

Step-by-step with your numbers:
1. Values used:
2. Cat weight = 4.5
3. Chocolate eaten = 2
4. Chocolate type = 64
5.
6. Theobromine dose = 28.444mg/kg
7. Risk level = Mild signs possible
Did we solve your problem today?

⚠️ If your cat has eaten chocolate, contact your veterinarian or a pet poison helpline NOW — do not rely on this estimate. This only screens the theobromine dose for context.

The math behind it

Chocolate is toxic because of theobromine. dose (mg/kg) = ounces eaten × theobromine per ounce ÷ body weight (kg). Signs can start around 20 mg/kg; over 60 mg/kg is dangerous.

Worked example

A 15 kg dog eating 2 oz milk chocolate → ~8.5 mg/kg (low, but still monitor).

FAQ

Should I wait and see?

No — call your vet immediately if any chocolate was eaten, regardless of this number.

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